MIL-STD-2191.pdf

NOTE: MIL-STD-2191 has been redesignated as a Standard Practice. The cover page has been changed for Administrative reasons. There are no other changes to this Document.

MIL-STD-2191 (SH)

5 NOVEMBER 1992

SUPERSEDING

NAVSEA 0900-LP-014-1010

JUNE 1966

AMSC N/A FSC 2010

DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.

INCH-POUND

DEPARTMENT OF DEFENSE

STANDARD PRACTICE

REPAIR WELDING, WELD CLADDING, STRAIGHTENING,

AND COLD ROLLING

OR MAIN PROPULSION SHAFTING

HIL-STD-2191(SH)

I

1. l%is nilicnry scandnrd is approved for uso by the Naval Son Systems Command, Dopartnent of the Navy and is available for use by all Doparcaents and AgencLes of the Depnrcment of Dofenso.

2. Beneficial cortments(recouroendacions,additions, deletions) and any pertinent data which may be of usc in improving this docwncnc should be addressed co:

Commnndar, Naval Sea Systems Command, SEA 5523, Dopnrcment of the Navy, Washington, DC 2D362-5101 by using the self-nddrossodStsndardlzntion Document Im.provcmentProposal (00.Form 1426) appaaring at the end of this document or by lctcer.

I

I

. ii ‘

A

Paragraph 1.

1.1

2.

2.1 2.1.1 2.1.2

2.2 2.3

3.

3.1 3.1.1 3.1.2 3.1.3

6.

6.1 4.1.1 4.1.1.1 4.1.2 .i.l.3 6.L.4 6.2 6.2.1 6.2.2 6.2.3

5.

5.1 5.1.1 5.1.1.1 5.1.1.2 5.1.1.2.1 5.1.1.2.2 5.1.1.3 5.1.1.4 5.1.1,5 5.1.1.5.1 5.1.1.5.2 5.2

6.

6.1 6.1.1 6.1.2 6.1.3

HIL-STD-2191(SH)

CmTms

SCOPE .................................$

scope

APPLICABLE DOCUUSNTS

Government documents specifications,standards, and handbooks

Other Government documents, dravings, and publications

Non-CovcwLmmrtpublicacions Order of precedence

DEFIN1’fIOliS Cmrernl Uald build-up Cladding Compleced weld

GStW.RALRSQUIREUSNTS Repairs ...........................- Major repairs

W.aldingofmajorrcpnirs Minor cepairs Cracks Cold rolling after .voldirigor scrnighcening

Shaft mncorial Carbon steels

Alloy steels Other shaft macorinls

UELDINC RSQUIRSWNTS

Welding procedure qunlificor.ion Specific qualification requizemants Essential elements ......................”

Inspection and test requirements Welding qualifications Cladding qualiffcaCiOns ‘Testassambly Thickness Cross qualification MIL-S-23286 materials Materialsnot listedin NIL-S-2328h Welderperformancequalification

RECJ3RDRSQUIRSKENTS

Records Welding electrode con’cKolinspaccion

Repairs llondastmctivo cesci~ k 6+ L fl .2 k Ii

I

. iii

HIL-STD-ZIYICSHJ

cmTENTs - Sonchued

Paragraph 7.

7.1 7.2 7.3

8.

8.1 8.1.1 8.1.2 8.2

9.

9.1

10.

10.1 10.1.1 10.1.2 10.2 10.3 10.3.1 10.3.2 10.3.3 10.3.6 10.3.5 10.6 10.4.1 10.4.2 10.4.3 lo.4.fl 10.4.5 10.6.5.1 10.h.5.2 lo.h.5.3 10.6.5.6 10.4.6 10.4.7 10.4.8

11.

11.1 11.1.1 11.1.2 11.2 11.2.1 11.2.2 il.2.2.l

INSPECTION RWISlSS4SNTS Visunlimpoctf.on tiagnacicparticla and liquid pamtronc inspection ..

Ultrasonic inspection

RECEIPT INSPECTIONOF WELDING FILLER MATERIALS

Responsibility Contractor inspection Receiving activicy inspection Nonconforming filler ❑ntorinls

WELDINGHATSRIALS AND PROCESSES ..........’

Approved filler mncerinls .md procossos

RSPAIRRQVIRS!UZNTS

Apprwal Major repairs Minor repairs Defect removal Repair by fairLngin MinOrpitcing Cracks andsrnmiepits Additional crack and pitting requirements Submarinoshnfts Surface ship shr.frs Weld repair NaterialsrequiringapprOval Preparocion forwarding Preheat Welding sequence Post.weld heat treatment Stress relief pOsitiOn Heating methods

Temperature mnsurcmmt during stress relief Intemadiate stiess relief Hardness tasting for stressralief Waldingposition Distortionmnasuremontduringwelding

STRAIGHTENING

Shaft mntorial New ahnfts Used shafts Procedure Determine location, magnitude, and type of band ...

Kerhods Hotstraighmning

Mu s

M iv

I .

I

Pnragraph 11.2.2.1.1 11.2.2.1.2 11.2.2.1.3 11.2.2.1.4 11.2.2.2 11.2.2.2.1 11.2.2.2.2 11.2.2.3 11.2.2.3.1 11.2.2.3.1.1 11.2.2.3.2 11.2.2.3.2.1 11.2.2.4

12.

12.1 12.1.1 12.1.2 12.2 12.2.1 12.2.2 12.2.3 12.2.6 12.2.4.1 12.2.4.2 12.2.5 12.2.6 12.2.7 12.2.8 12.2.9

13.

13.1

M M.1 lL.2 14.3 16.6 16.5

CONTENTS - Concirruad

During tempering Afcerccmpering Scrass roliof Cold rolling iacnlized heating (hoc sPOtting) Hot spotting procedure Dial indicators .............................;...

Cold straightening Cold peening Machining.or grinding after cold strnighcening ..

Vibracionsupporc Vibrauxyforcas Ot.hormethods

C4MDROLLINC

Cenernl requircmenta New shafts Refurbished shafts Procedure Finish requirements Roller sizes Rocircionand face Shafts Newshnfcs Repaired shrifts RollLng tapered sectionsof existingshaft Lubrication Roller loads Inspection Final finishing

SHOT PESNINC RQUIRRCtN’TS Shot peening requirements

NOTES

Intended USE Issue of DODISS F.acilicyapproval NAVSEA authorized representative Subject term (key vord) listing pJJcJ la lg lg

I

. v

Tnble I.

Ix.

111.

Figuro 1.

2.

3.

CONTSNTS - Continued

TABLE

Filler materials and specifications Prahencing and post-weld hcac r.reammnt requirements

ROllOr loads

FIGURE

Joint design for weld rcpnit in solid shafting

Joint design for weld repair in hollow shafting

Methods of supporclng shaft for straightening by vibration vi

141L-STD-2191(SH)

1. SCOPE

1.1 -. This standard concains minimum requirements for weld cladding, repair welding, mechnnicnl straightening,and cold rolling of new ond refurbished main propulsion shafting and for repair welding of rudder stock: for ships of cite U.S. Navy.

2. APPLICABLE DOCUHENTS

2.1 Governrmnt dacumenc~.

2.1.1 Specifications. standards. and handbooks. The folloving specifi-caclom, scandnrds, and handbooks form n part of this document to che extent specified herein. Unlass otherwisci specified, che issues of chose documancs are c.hoseliscad in the isstm of the Dopartmnc of DefenseIndexof Specifications and Standnrds (00DISS) and supplement cheroco, ciccd in the solicitation (see 14.2).

SPECIFICATIONS

MILITARY

MIL-S-13165 -

HIL-E-21562 -

nIL-E-22200/l -liIL-E-22200/3-tlIL-E-22200/lo-

HIL-S-23284 -

MIL-E-23765/l -

KIL-E-23765/2 -

lUL-E.2f@03/l -

MIL-E-24h03/2 -

KIL-R-81841 -

Shot Peening of Metal Parts.

Electrodes and Rods - Volding; Baro, Nickel Al10Y.

Electrodes, UoldLng, Mineral Covered, Iron-Powder, lm.Hydrogan tIodlumand High Tensile Steel, as Welded or Stress-Relieved Weld Application.

Electrodes, Welding, Covared: NickelBase A11oY:

and Cobalt Base Alloy.

Elcctrodos,Welding,HinornlCovored,Iron-Powder, Lotr.HydrogenMedium,High Tensileand Hlgher- Strength Low Alloy SCeels.

Steel Forgings,Carbonand Alloy, for Shafrs, Sleeves,PropellerNuts, Couplings, and Scocks (Rudders and DfvLng Planes).

Electrodes and Rods . Velding,Bare, Solid and Alloyed Cored, Ordinary Strangth and tin Alloy Steel.

Electrodesand Rods - Welding,Bare, Solid,or Alloyed Gored,Mu Alloy Steel.

Electrodes- Welding, Flux Cored, Ordinary Scrcmgth and Law AI1OY Sceo1.

Electrodes- Welding,Flux Cored, LOW-A11OYSteel.

RotaryFlap Pecningof Netd Parts.

1.

I

141L-STD-2191(SH)

STANDARDS

I

MILITARY

MIL-STD-248 - Welding and Brazing Procedure and Performance

Qualification.

MIL-STD-271 - Requiremont8 for Nondestructive TestingMethods.

HIL-STD-27S - Welding and Casting Standard.

(Unless othczwise inditoted, copies of federal and military specifications, scnndnrds, and handbooks arc available from the Scandardizncion Documents Order Desk, BUYS. 40, 700 RobbirrsAvenue, Philadelphia, PA 19111-5096.)

2.1.2 ~llgs. doc w nnd nub~ 0. The following other Covomnimc docrmmncs, dravings, and publications form a Parr of this documenc to the cxcent specified herein. Unless othervise specified, the issues arc chose ciced in the solicicacion.

PUBLICATIONS

NAVAL SSA SYSTEMS CD3UWND (NAVSW

0900-LP-003-8000- Metals,SurfaceInspection Acceptance Standards.

O9OO-LP-OO6.3O1O . Hull Structure Production - RepaiC Wc+lds

U1trnsonic Inspection Procedure - Acceptance Standnrds for.

0910-LP-105-1300- SSN and SSB(N) Submarine Main Propulsion Shafting, TRS Volunm Pare 1 Refurbishment Procedures. (S9243-AT-TRS-Dll/0203-0S6-009A)

O91O-LP-1O5-MOO - Surface Ships Main Propulsion Shafting, TRS Volume 1 Part 1 Refurbishment Procedures.

(s92ft3-Au-TRs-011/0203-0B6-501A).

(Application for copies should be addreaaed co the Scandardf.zationDocuments Order Oesk, BLDG. 6D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.)

2.2 ?Jon-Go.errmencu.bliceti. Tho following document(s) form a pare of .

this docunmnt co the extent specified heroin. Unless otherwise specified, the issues of the documents which arm 000 adopted are chose liscad in the issue of cho DODISS cited in the solicitation, Unless othervise specified, the issues of docummtts noc llsced in the DDDISS are the issues of the documents clced in the solicicacion (sea 14.2).

AM~ICAN SOCISTY FOR TSST2NC AND MATSRIA3S (AS314)

E8 - Standnrd”Tesc Hathods of Tonsion Testing of Metallic ltacarials. (DoO ndopced)

(Application for copies should bo addressed to che American Society for Testins and Haterinls, 191$ Race Street, Philadelphia. PA 19103.)

AMERICAN WELDING SOCIHY (AWS)

A3.0 - SctrndardWelding Terms and Oefinlcions Including Terms for

Brazing, Soldering Thermal Spraying and T3mrmal cutting.

(DoD adopted)

A5.01 - FillerTi?JlialProcurementGuidelines.

2“

(Applicationfor copios should bo nddrossod co tha American Welding Society, Inc., 550 N.U. L-e.JouneRoad, P.O. Box 3510b0, Miami, FL 33135.)

(Non-Goverrtmentstandards and othor publications aro normally available fron the organizations that preparo or distribute the documents. These documents also may ba available in or through libraries or other informacfoml services.)

2.3 Order of nrecedenco. In che event of a conflicc bacwecn the text of this document and the references cited herein, the text of this document takas precedence. Nothing in this document, however, supersedes applicable laws and regulations unless n specific oxcmpcion has bean obcnlned.

3. DEFINITIONS

3.1 Canernl. Excepc as noted heroin, welding nomenclature and definitions shall conform co AUS A3.D.

3.1.1 !Jeldbuild-un (b~ . . Void build-up %s deposiclng veld metal chnc is compatible to the base material in metallurgical and mechanical propertiesfor tha purposeof restoringweldeddimensions,thicknesses,or orher configuration requirements.

3.1.2 Cledd~. Cladding is a surfacing variation that depositsor applies surfacingmatoriol, usually to improvo corrosion or heat resist.?nco.

3.1.3 @mPlated ve3,Q. WoldLng is complacod when preheat is removed and the material has coolad to ambient tamperucuroand the weld has been visually accepced and 15 ready for ocher nondestructive cesc (NOT)’inspections.

4. CSNSRAL RSQUIRSKSNTS

4.1 ~. Repairs shall include replacement of shafting sections or I flanues. buildinz UD of erodad or corroded arms. repairof d/iuu3KOdbolt holesor koyviys; and rep;ir”of cracks. Repairs shall also i~cluda rowori by grinding.

4.1.1 Mnlor ~ Repnir shall bo considered major if i.tinvolves joining two sactions of .&fes cogechar, replacing a f’lnngo,repair of crack. 1/2 inch deep or deeper, build-up of 3/8 inch or aora in thickness, or build-up of any thickness that covers 5 percent or more of the total surface area in way of sleeves, capers, flnnges or fillet5, or build-up of any thickness that cover more than 25 percenr of the remaining surface area. Crooves frmm cablo wrapping are to be considered cracks for classificationos to mmjoror minor repairs. Thicknesses are deflnod as finul machined thickness.

4.1.1.1 Weldine of mnlor reon~. Unless othmvise approved (SOO 14.b), welding of rapairs Clnssifiod IISmajor shall be accomplished after exccnding che weld repair groove 360 degrees around the shaft circumference to mirrlmize distortion and equalize weld stresses.

ML-sTD-2191(SH)

6.1.z ~ rer.~. Repairs shall be considered minor if they involve build up of keywys rindbolt holes or othe~ise do noc meet cho crftoria specified II!fb.z.l.

6.1.3 w. Crack repairs. whether classified minor or major, or repaired by fairing or welding, shall be reported (see 14.L).

.4.1,A Cold ~ aft x elding or .scr~ Cold rolling may be required nfter welding or sc;ni&tanLng (see 12.1.1 and”12.1.2).

6.2 Shnfc mncaru. TMs standard shrillbo follovcd for repair of all stcol shafts. Repairs co shafts of materials noc listed in 6.2.1 or 6.2.2 require approval (see M. ~).

L.2.1 Carbon steals. Roplacomenc (new) shafts of corbon SCCOIS shall ba in accordance with MIL-S-23284,class 3 and 4. For che purposo of welding qumlification, class 3 and class f?will be considered S-L in accordance wLth

NIL-STD-278.

6.2.2 ~ v steeti. Ropl.%cemont(new) shafts of alloy steals shall be in accordance wichOMIL-S-2328b,cla5s 1, 2, 5, and 6.

6.2,3 Qther shaft mnrerin~ !Jhanshaft material cannot be determined from markings on the shaft, or for nmcQrlals other thnn as specified in 4.3.1 or 4.3.2, the followln~ fnformmtion shall be dacermlned prior co welding, mechanical straighcenin~, or cold rolling (see 16.6).

(n)

(b)

(c)

Rardness information including n minimum of five hardness readings taken frem the and of cha shaft. Standard Rockwell (B or C scale) or Brinall (scnndard ball) hardness cescing is acceptable. Mcro -hardness (for axample, Diamond pyramid) castLng is not ncceptablo.

Clemical composition information from an unvelded portion of che shaft. The minimum elemenr.camlyzed shall include: carbon (C), mmnganese (tfn),silicon (Si), chromium (Cr), molybdenum (Mo), nickel (Ni), vc.nadium(V), sulfur (S), and phosphorus (P). The weight percenc shall bo reportod CO two decimal placcts(X.XX) for all alamonts axcepc P and S, which shall be roportod to threa decimal places (X.XXX).

RnowrIinformation listed in 10.1.1.

5. WELDING RSQIJIRS21ENTS

5.1 Welding c.roced.req.~. Procedures for welding and cladding shall be qualified in accordance with MIL-STD-268 and as specified in 5.1.1 through 5.1.1.5.2. Procedures and parsonrml previously qualified co earlier revisions of this otmndmrd, for which records are available and qumlificatiorw have been maintminad, shall not in ganeral require requalification to thie revision. However, the authorized representativemay requirekequ.elificacionto thisrevisionon a case-by-casebasic whrme he has specific cortcornsabout tho adequacy of procedures or abflity of permnmel to produce welds of intended integrity or which moot requirements of the applicable fabrication document. ,, HIL-STD.2191(Sli)

5.1.1 SDecLfic aualific~lr mone to

5.1,1.1 Essential elem-. Unless ocherwlrm approved (see 14.6), for weld depth greater chnn 2 inches the joint designs on figure 1 and figure2 shall be utilized, l%one figures may also be used for weld dapth of 2 inches or less. FcIr all repair welds, weld joint geomotry shall be selected co ❑inimize the volume of weld mctnl daposfcad. In additfon to qunlificncion raquhxmrmrcs in accordance with HIL-STD-24S, che following shell bo included as essential elements of the weld procedure.

(a) (b)

(c)

(d) (e) (f)

(g) (h)

(i)

Welding sequence (selecccd co minimizo dlsr.ortion).

Rotaclan (circumferential)speed of the shaft for the ho,rizoncal rolled position for oucomatic, mechanized or semiautomatic welding processes.

Longicudhral (nxial) cpocd of chc head for CIutomncicor mechanized welding processas.

Discorcion concrol coechods(for example, peening).

140thodsOf fifuclin6pCCCi0n.

Method of scrassralief(see10.4.5).

Rotation speed for horizoncnlrolledstressrelief (see 10.6.S.1).

Mechod for preventing surfaco scaling during scra.ssrelief (see 10.4.5.2).

Method of ❑easuring distortion during walding (see 10.fI.K).

Note: Change in rotational and locrgfcudinnlspeed will not require requalificationns long ccsthe heat input does nor exceed heat input used for quc!lificatiocr.

5.1.1.2 . Destructiveand nondestructive costing shall be parformed after stress relief but no sooner chnn 26 hours after the material has reached ambient cemparacure.

5.1.1.2.1 ~ a.n~ s. Weld procedure qualification shall be in accordance with !!IL-STO-2f18,with the following exceptions:

(8) Radiographic inapectlon (RT) is not required.

(b) Ultrasonic inspection (UT) as specified in 7.3 1s required.

(c) TWO transverse weld and rwo all weld metal censile specimens are required.

(d) TWO mcccrogrnphicspecimens, removed Crarcsversato the dfreccionof welding,meotin8requirements in accordance with NIL-STD-268 ccre required.

(e) A microhardnesssurveycoveringwald metal,heat affectedzone (HAZ), and base motnl fromborh sidesof che weld depositis required. The su~ey shal1 traverseperpendicularco che centerlineof the weld. Lineardistanceberweenhardnesstesting 0itea shallbe not greaterthan0.020 inch. The su~ey shall indicacf!a relativelyuniformhnrdnesslevelacross the area tested. Finalevaluationof the hardnessprofileshallbe sought (see 14.6).

(f) Sets of five impacc specimens shall be prepared for the weld DeCal, sets of three imoacc srmcimonsshallbe orenaredfrom che heaC affected zone .(HAZ)of enchbasn metal and sees of threeimpact specimensshallbe prepared from che non-affectedarea of each

MIL-STD-2191(SH)

I

I base metal. Impncc Cesclng shall be porfotmed to the requirements of nIL-sTD-2&8. Impact specimens shall umot impact requirements of the base mocal at the temperaturelisted in the base metal material speciflcncion. If rho base material speclficacion doss not require impact testing, approval cihallbo sought (sea 14.6).

5.1.1.2.2 ~cntion s. Cladding procedure qualification shall be in accordmce with MIL-STD-268, vith the following oxcoptions:

(a) Ulcrnsonic inspection (UT) .s specified in 7.3 is required.

(b) When chc procedure involves corrosion-resistanc cladding, chemical analys1s of the clnd cmcorinl at the minimum chicknass qualiflad of cladding is required. For Inconal 625, iron convsnc shall be not gr.aatorthan 9 porcenc and molybdenum concent shall be noc Less than 8 percenc.

(c) Three tensile tests of the clad inacerialare required. Test specimans shall be sub-sizo, flat, 1/8 inch chick in accordance with ASTM E 8, and shall be takan after fiml heat treatment, normsl to the direction of walding, ac the minimum thicluress qunlified for cladding. ?fini.mumacceptable yield strength shall be 60 kilopounds par square inch (klb/in2)at 0.2 percent Offsac.

Ocher mechanical properti.asshall be as required by the olaccrode spocification.

5.1.1.3 r~b~. Tho Cost assembly shall be in accordance with HIL- STO-248, with the following additional rcqulronmncs:

(a) The rest assemblyshallbo cylindrical.

(b) The test assemblyshallbe a shaftwhen major repairs are required in ocher than cladding or buildup.

(c) As npproved (see 14.4) for noncircumferontlnl minor ropnirs.

5.1.1.4 Thicknes4. A 1-1/2 inch weld groove in a 3-inch (minimum) wall thickness hollow cylindsr or a 1-1/2 inch weld groovo in a 6-inch (minimum) diametnr solid cylinder shall qualify for all thicknesses of material.

5.1.1.5 @Oss GU U&kMQII.n

5.1.1.5.1 ttlL-s-232ab ~. Welding procodure cross qualificaclon for NIL-S-2328& materials shall bo allowod M follows:

(a)

(b)

(c)

(d)

(0)

(f)

Welding of class 1 mncarinl slmll qualify for welding of class 1 and class 2 mncarial.

Welding of class z material shall qualify for welding of only class 2 material.

Welding of class 3 material shall qualify far welding of class 3 and class 6 mater141.

Welding of class 6 mar.arialshall quslify for walding of only class 6 material.

Welding of CISSS 6 aateriel shall qualify for welding of CISSS 6 and class 5 material.

Weldingof class s material shrillqualify for ~i”g of only class 5 amterial. ..

. . MIL-sTD-2191(SH)

5.1.1.5.2 s not Iiscsd_b MIL S 232. . 86. Weldingprocedurecross qualificationfor ❑aterialsother thanas listedin 4.2.1 and 4.2.2 shallnot be allowedexceptas specificallyapprovedon o casebasis (see 16.4). For cross qunliffcntion approval on e case basis, all welding requirements listed herein shall be mat. In addition, approval shall be sought (see 16.4) for the folloving informncion prior co weld repair:

(a) For the shaft co be repnired, information Msced in 4.2.3.

(b) lltaupplicablo valding procedure propsred as specified in 5.1.1.1.

(c) Tho applicable welding proceduro qualification information prepared as speclffad in 5.1.1.2, 5.1.1.3, end 5.1.1.-4.

5.2 Weldernerformnnccaualificlltion. Prior ro pcrforningany production welding covered by this standard, personnel shsll be qualified in accordance with MIL-STD-248. Changes or modificncions to distortion control aspects of velding procedural do not require rcqualificntion of welders; however, they shaLl be thoroughly instructed in such changes prior to production use of the modified procedure.

6. RECORD REQUIREMENTS

6.1 Jts.cord.i. The quality control system shall include che preparation and mnlntsnance of written records. Records shall contain, as a minimum, the follov-ing information. (Vendor inspection or ❑ill curtificoco records will fulfill the requirements of this section for that portion of the required information concained theretn.)

(s) Welding procodure qualification records in accordance with UIL-STD-246 and as required herein.

(b) Welder and welding operator qualification records in accordance with t41L-STD-2f18.

(c) Nondestructive test (NOT) procedure qualificaci.n records in accordance with uIL.sTD-27L.

(d) NDT personnel quslification records in accordance with HIL-STO-271.

Unless ochervlse specified, all required records shall be maintained by the accfvfty and be available to NAVSSA or its authorized representative chroughouc the lifo of the contract and for 3 years after delivery. At the expiration of the record rerention period, NAVSILhor its authorized reproscncatives shall be given a written notification. Disposicion of records shall be ai agreed upon by NAVSEL% and the contractor.

6.1.1 YeldLnE l~ctcod C ~ suectiqll. Records of inspection required by section 8 shall c~ntain t~e jollowing:

(n) Hanufaccurer’s certfficacion and test results for compliance vich the applicable spocificncien.

(b) Date of inspection and signatuta of inspector.

. 7

IIIL-STD-2191(SH)

6.1.2 &&x.s. Records of.repair inspection shall contain the folloving:

(a) (b)

(c) (d) (e) (f) (g)

(h)

Identificationof shaft (serial number, ship) Shaft material (chemical analysis as specified in 4.2.3 for mcarials not listed in .4,2.1or 6.2.2).

Locntion, sizo, and orioncation of defects.

Data and typo of original inspecckm and inspecror’s signature.

Welding procedure and filler material used.

Welder’s identificationand signature.

Post weld thermal creacmcnc including charrs or recordings of cimcs and temporacures.

In process nnd finnl inspcccions,dates, results, and inspector’s identificntion and sigrmcure.

6.1.3 &andestructive Ccst&. In addicfan co nondescruccive testing record reauiremencs in accordance with MIL-STD-271. records of nondcstruccive cescinc.

shall include the following:

(a) (b) (c) (d) (e) (f)

7. INsPECTION RSQUIE WW2S

Component description and uniq.teidentification.

Approved procedure idantif f cncion.

Equipment/materialused.

Acceptance standard usad.

Gate of ir-mpecclon.

Inspector’5 eignature.

7.1 w insoe~. Visual inspection shall be porforumd in nccordanco with MIL-STO-271. Inspection shall be performed as follows:

(a) Areas fnired in or prepared for void r.pair shall be inspocced to ensure defects hove been removed and the area blends smoothly into tho base material.

(b) Each layer of wald deposit shall be Inspecced. Cracks and lack-of-fusian (includingweld rollover) shall be rejected. I%e final weld surface shallmeet classI weld acceptance,criteriaof NAVS&

0900-LP-003-8000.

7.2 tMneti c -c3e and 1~. Ferromagnetic material shall be mugnotic particle fnspocted. Nonferromagnecfcmaterial, or applications where %3necic Particle inspection iS nOt practical, shall be liquid penetrant inspected. Inspections shall bo performed in accordance with

HIL-STO-271.

(0) (b)

(c) (d)

, (e) lle following araas shall bo inspe.ccod:

Oafoc C removal sites.

Completed weld repairs aridweld cladding (inspecc no sooner then 24 hours after final heat trear.menr,).

Nachined areas (including areas repaired by fairing in).

Areas subject co temperatures obovo 500 deRrees Fahrenheit (”F) (for ex&ple hot-spot srraightenlng].

Areas ❑echanically worked (for example, peening, rolling).

141L-STD-2191(SH)

Surfnc@s shall ❑eat raquironancs of NAVSSA “0900-LP-003-8000. For welds, class 1 criteria shall apply. Clad areas shallbe evaluatedto the weld criteria, not the ueld overlay requirements.The shaft shall be demagnetized after magnetic particle testing.

7.3 Lrics.nlc insnec-si.n0. Inapoccion shall bo porformcd as follows:

(n)

(b)

Clad surfaces and weld build-up nreas comprised of ❑ore than onc weld loyor (mora than ono pass) shall be inspecced using the ultrasonic inspection procedure for weld deposited buttering in accordance with MIL-STO-278. If che weld metal and base ❑aterial arc acoustically similar (as defined in HIL-STD-271), it is not nccessnry to apply weld metal on the calibration block.

Inspection shall be porformod aftar pose-weld heat creaunenc.

Accopcance criteria shall be in accordance with MIL-STO-278 for weld deposited buttering using the weld thickness as chc design macerinl thickness.

Ochar void repairs (for axmnplo, weld repairof cracks)shallbe inspeccod to tho ultrasonic weld inspectionrequirementsin accordancewith MIL-STO-271. Inspectionshall not be performed sooner than 26 hours afterpost-weldheat treatment. Acceptance criteriashallbe in accordancewith clsss I of MVSfA O9OO-LP-OO6-3O1O.Criteriashallbe based on the weld ❑etal thicknessor 1 inch,whicheveris less. For indicationswithin 1/4 inchof any surface,any indicationwhose cmplicudeequalsor exceedsthe disregard 10VC.1(ORL) shall be rejected.

g. RECEIPT INSPECTION OF WELDING FILLSR KATSRIAM

8.1 Kenr.onsibil&y.Tha recaivingactivityshallbe responsiblefor verifyingthat the inspectionsrequiredin thissectionare performedand documented. Certifiedtest resultsFor all fillermaterials,showing chemical and mechanical properties, shall be obtainedand reviewedfor compliance Vith the applicable material specification. L-svalI fillar materials recelved from Navy ShipsParta ControlCenter (SPCC)by Navalshipyardcshallbe consideredas meetingthe chemicaland mechanicalpropercictsof the fillermc~erial,as documentalby SPCC.

8.1.1 Contractor~. Ulrerothe requiradinspectionis performedby the contractor or by other subcontractedraproseatativaprior to receipt,che receipt inspection by the receiving accivi~ shall consist of checking che required documentation agnicwc the maceriol received for compliante with che applkable material specification.

8.1.2 Becetvinmaccivitvinsnectti. Uhere the requiredinspeccionhas not been made prior to receipt,che receivingacclvicyshell perform and record the irispectionsrequfred by the applicable specification.

8.2 ~roat a-. Filler materials which do noc comply with the applicable specification shall be isolated and not used for production welding.

141L-sTD-2191(SH)

9. WELDING UATSRIALS AND PROCESSES

9.1 AuorO d filler mnr.rials and orace=. Repr.asenrativefillar material types and speci~cations shal; be as specified in table 1. lhe use of other processes and ❑areriala will be permitted, with approval (sea 16 .4), for the Inconded application. Unless ocherwiso specifically approved (see 14.4), tha maximum henc input shall be 55,000 JOU1OS per inch for materials listed in 6.2.2.

I

10 “

HXL+TD-2191(SII)

MIZ-SZ’D-2191

, I I I ?! I

1 I I I A I

I I 1 I . 1

~ Equivalent filler materials meeting AWS specificationsmay be substituted for t41L-typa Elllor LOaCOrlCIS. Acquisition of AWS electrodes shall be in accor-dance with A!lSA5.01, 10C classificatione% and S3, for covered and bare olaccrodas, respoccivoly, and a cerclfieditemized cast roporr.in accordance vith schedule J is required.

~ See 4.2 and 6.2.3.

3/ Filler materials selected for those staels shall be 4s approved on a case basis (see 14.4).

~ lllL-10018-141conforming co t41L-E-22200/10is an acceptable alternate.

W 141L-7018-H conforming co MIL-E-22200/10 is an acceptable alternate.

~ CorrosLon roslccanc cladding consumables nro applicable for all shaft materials for steels included or not included in NIL-S-23284 or shafts with oblicernced shnft ❑arkings.

~ Pounds per square inch (lb/inz)

10. REPAIR REQUIREMENTS

10.1 ~.

10,1.1 ~. Approval is required for major repairs (see 16.4) and requires tho following information:

(0)

(b) (c) (d) (0) (f) (g) (h) (i)

Hilitary❑aterialspecificationnumber,revisionnumber, class,as in !41L-S-2328f$-RS-CLX.

HeaK or forgingnumber(traceabilitycode).

Shaftmnnufacturer”sname, trademark,or symbol.

Final tempering temparacuro.

Scrass relief tamperacure.

Drawing or die number.

Excenc of repnir raquired.

Dascripcion of dofeccs (typo,size,and locacion).

IJeldingrepair proceduroand qualificationdata.

and alloy

10.1.2 Approval for minor repairsshall be obtained from the

authorized repre~encative;nd requiresall information listed in 10.1.1.

.10.2 pefect QmQyl?&. Dafeccive areas shall be removed complotoly by chipping, grinding, or ❑ochining co sound base ❑etnl. Grooves or rapair areas caused by removal of dnfeccs. and surfaces of the shaft adjacenc thereto, shall be inspected as specified in section 7.

10.3 ~. General requirements for rapair by fairing in shall be as specified in 10.3.1 through10.3.5.

10.3.1 Minor DLt&$Qg. 14inorpicthg, 1/16 inch in depth or less,shall be removed by using n rotary fiLe, wira brush, or similar hand tool. In no case shrillthe resulting shaft diameterbe more than 1/8 inch less than che minimum diameter shown on the applicable drawing.

. 13

MIL-sTO-2191(SH) less inch

10.3.2 cracks and Sevaro nits. Cracks or severe pits 1/8 inch in depthor for shafts up co and Lncluding10 inches in diamacar, or not exceeding l/b in depth or less for shafts excmdfng 10 Lrrchasin diameter,may be repaired by grindingand dressing the ground areas to a large faired radius (three times the depth) to avoid stress concontrntions. In no case shall che rosulclng shaft dmmcer be loss than che minimum dfnmecor shovn on the applicable drawing by more chm l/L inch for shafts 10 inches and under in dime car or 1/2 inch for shafcs over 10 inches.

10.3.3 Addicionnl crack nnd~ e. The requirements

spocificd in 10.3.1 and 10.3.2 shall apply to random cracks or pitting and shall be intcrprs.tcdas allowinggroovingco a continuouslengthof 180 degreesmaximum along che shaftcircumference.Grooving 1s not permitted where grooves are 180 degrees diametrically opposite each ocher. In addition, in any 3 foot length of shaft no combination of groobos shall addlctivalycombina to axcecd n length of 180 degreesalong the shnfc cireumfarenco.

10.3,& Submarinesha~. For submnrinashafts,addtclonnlrequirementsand restrictionson repairby fairingin shall be in nccordnnco with NAVSIM o91O-LP-1O5-13OO(S9263-AT-TllS-011/0203-086-009A).

10.3.5 >urfaceshin shafts. For surfaceship shafts,additionalrequire-nencsand restrictionson repairby fairlngin shallbe in accordancewith NAVSF.A

O91O-LP-1O5.16OO(S9243-AW-TRS/0203-086-501A).

10.6 Weld reuafi.

10.4.1 n~. Naterials not llstad in 4.2.1or 6.2.2,and materialsnot identifiableby markingson the shsfc,shallnot be weld repairedwithoutprior approval (sea 4.2.3 and lb,4).

lo.fb.2 ~ owd. Areas to be weld repsiredand adjscenthose materialvithin1 inch of tho weld repairarea shallbe free of oil, grease, or othersurfacecorrtaminsrrtswhich couldadverselynffcctthe weldingprocess.

Preparationshallprsvfdoadeqsate accessibilityfor welding.

10.6.3 ~. Weld joincsand areasshall be preheated to the tempera-tures specified in tableII. Prehestshallba appliedin a manner that ensures uniformheatingof the weld area and a minimumof 6 inchesof base materialon all sldssof the repairareas. Prehoac csmporatureshall be maintained throughoutche weldingoperation.

MIL-sTD-2191(SH)

TABLS II. ~g and DOSc-weld heat traatment re.auiremencs.

1 I Shaft material

Prehets’c-interpass Posc-weLd treatment Spocifkation class temperature (”F) temporacure (“F) I./2/ ~ Y

MZL-S-2328& 1 400 tnin- 500 mnx 1200 t 25

2 &OO m~n - 500 max 1200 * 25

3 400 min - 500 mnx 1175 k 25

.3 275 min - 400 Max 1175 k 25

5 275 min - 400 max 1050 ~ 25

6 275 min - 400 ma% 1050 f 25

~ Holding time at stress-relief cemperaturoshall be 2 hours per inch of weld deposit chicknass. A minimum holding rime of 2 hours is requfred for welds less chnn 1 inch thick.

~ Heating and cooling rates of shafting, as determined by thermocouples accached theroco shall be 150”F per hour maximum. The shaft may be cooled in still air after reaching450”F (sac10.6.5.3).

~ UIISimumf.rmncotamporat.rrifor charging shmfcshallbe 500”F.

~ post-weldheat creacmentcemperaturamuse be a ninhum of 50”F below zempering tmnperncuro. When past-weld heat treatment temperature is nbove actual shaft tempering temperature, pose-weld heat crearmcm shall require specific approval (see 14.4). Activities shalldotenninetempering temperature of all shafcs prior to post-weld heat treatment. Where temperingtemperature informationLs not available,hardinesssurveysas specified in 10.4.6 shall be performsd before and after stress relief.

10.4.6 Waldinu saaumv+. The welding sequence shall minlmlze distortion.

10.6.5 Pose-weld henc cre~. After welding, shafts shall be stress-relief heat trencad a5 specified in tablo II.

10.4.5.1 ~tro.m roliaf nositf~ Uhero practical, shafts shall be stress relief heat treated in t@ vertical position or in the horizontal position with the shaft rotated continuously while the shaft is above 500”F to minimize distortion. Repaired shafts shall moot scraightmss tolerances speclfied in che origimml or applicable shaft drawing following final heat creatmenc, unless otherwise approved (SEE 14.4).

10.4.5.2 )ieatintzmathodS. Whore pratcical, post-weld stress relief,shallbe accomplishedby furnace heating. Local heating with resiscance or induction type portablo heating units is acceptable, prov2dod the width of the heated nroa on each sLde of the weld groove is at lease twice tho weld thiclmess. Other hsatlng GMthods require approval (see 14.4). .%ctiotrsof shafts, including bores, which are ancicipaced co be abeve 500”F during stress relief, shall ,becovered,wlcha ,, . 15

HIL-STO-2191(SH)

heat resisting 8calc prevcntacivo such as ‘No Cmrb. or ‘No Scalen or equal. If coating of the bore is not praccicnl, the bore may be plugged on each end and purged through che plugs with m inert gas. Care ❑ust be taken to allow for expansion of gases in tho shaft bore during stress relief.

10.L,5.3 ~e meam!z.ement d~ss relieg. Regardless of scrass relief ❑ethod, stress relief temperature shall be ❑onitored by “thermocouples direccly acctcchedco the void repair nran. A minimum of chrao thermocouples shall be required for each weld ropnir area. Ono charmocouplo shall bo located on the surface nf cho shaft on the centerline of the vald. The ochar charmocouples shall be located on eichor side of tho wld repair, 3 inches from the weld. ~ermo-couplcs shall be scpnraccd fron each othor by a ❑aximum of 120 degrees along tho circumfcroncoof chc shaft. Aucographlc reports (strip chnrts), indicating real tine versus temperature, shall be utilized to documont all times and temparaturos above G50”F.

10.4.5.4 lntarmediaco stress relief. For weld grooves over 6 inches deep, intermediatestress relief may be used after one half of the weld groove depth has been filled.

10.h.6 Hnrdness c~. Wham ttxnporingcemperacure information is not available, hnrdmess sumoya shall be performed before and after stress relief. Hardness readings shall be tmkan from a portion of the b.sse material to be subjected to a full stress relief cycle. A ❑inimum of five hnrdness readings shall be taken both before and after stress relief from the same region of the shaft. Standard Rockwell (g or C scelo) or Brinell (standard ball) hardness casting is accepcablo. Microhardnoss (for axmmplo Diamond Pyramid) testing is not accepcabla. Other hardness testing mcchods may be used with approval (SICO16.6). Informscicnsgonoracad by hardness testing requires approval (see 1.3.4).

10.4.7 ~inz cmsit@. Unless othorvise approved (see 14.6), major and minor repairs shall be mmde in the flat position while rotmting the shaft with the sxis in the horizontal direction.

10.4.8 PIEtorcion measurement d- weld~. When welding is cwcpected to resultin distortionin excessof the acceptablelimit, distortion shall be meksurod durimg welding. Before prahoat is applied, four dial indicators shrillba located on the shaft. Tvo dial indicators,locacc!d90 dograas apart, Ehall be placed equidistant on each side of the centerline of the weld jolnc. The dial indicatorsshall bo located as fnr as prnccicol from che screctto be welded, but need not be more thmn 10 frmc discanc. Prior co application of preheat, the dial indicncorsshall be set to measurediscortionin eitherdirection. Appropriate ❑eans (forexample,weldingsequenca, pee”ing) shrillbo used to correct dktorc.ton during welding. AftOr welding is compleced and prehenc is remmved, discorcion in the shaft shall be within limits specified on the applicable drawing.

11. STMICXT21JINC

11.1 Sll?.ftMC eria~. lhfs sCandard shall be followed for straightening of all steel shafts. Straightening of shafts not lisccd in 4.2.1 or 4.2.2 requires nporovii prior to strafghcenlmg (see M. 6). This seccion is specifically‘8pplica-bio to Shkfmfg%nterloi lisce~Jn MIL-S-232B6 (sea fI.2.1 and 6.2.2). The motbd

. 16 “

MIL-sTO-2191(SH) of straightening shall depend on available facilities. experience of operating personnel, processing condiciOn Of shafciw, Whether new or used shafcin6 iS involved, and the axtanc of straighconing required.

11.1.1 Few sh&g. When new shafting requires straightening after the final heat traatmonc, tha straightocringprocassshall be followed by a stress relief performed at a minimum of SO-Fbelow the finaltempering cernperacuc%.

11.1.2 Used sha. Except as spocffiad in 11.1, used shafcing may be straightened. The straightening process shall bc followed by a stress relief performed CICa minimum of SO-F below the final coczperingtemperature.

11.2 &&ed ure.

11.2.1 Oetermlna location. mnmrlcude. and tvm of bend. Prior to inlcincin~ straightening processes, the location, magnitude. and type of bend shall be dotcrmincd. With the entire shaft supported on centers in a lathe, conduct a dial indicator sucvey of sh4ft run-out ac stcctionsspaced every few feet of shaft length to decermina tha magnicudo and locncian of the bend. At each station, mark the posirion of maximum run-out on che periphary of che sht?fc. 21cemarks on the shaft periphery will be in o straight lino if the shofc contains a simple bend and will spiral part way around che shaft if che shaft is both bent and misted. The maximum cm-out shall be plotted on an exaggernced scale to locace.the bend cencer and dacermine the excenc of straighconing required.

11.2.2 ~ethods.

11.2.2.1 ~. Thase methods are intended fOr U.SOduring manufacture of new shnfes vharo the affacts of scaling, local distortion due to pressing, and so ftirch,can be removed in subsequent machining. Other applica-tions require apprOval (see 14.4).

11.2.2.1.1 temueri~. Afcar the shaft has been held at the tempering tempornturo for the required time, cha shofc shrillbe removed from the furnace and straightenedunder a press. Tho shaft shall be stress relieved after straightecc-lng (see 11.2.2.1.3).

11.2.2.1.2 $frer remww&g. The shaft shall be charged into the furnace at 600”F or lover, raised co a cemperacure 50 co 100”F below the tempering temperature,equalized for 1 hour per inch of thickness, then removed and hoc straightened under a press. The shaft shall be stress relieved after hot straighmrnlng (see 11.2.2.1.3).

11.2.2.1.3 stress - e. After hoc strccightenlng,the shaft shall be Lzmedlately stress relieved at n temperature at lensc SO-F below che cmpering temperaturebut noc less thnn 1050-F for 2 hours par inch of maximum thickness, but in no case for less than 2 hours. Stress relief shall be followed by furnace cooling to 600”F under uniform conditions at a race not greater than 500”F per hour divided by the maximum thickness of the part in inches, but in no case gcoacer than 500”F per hour.

11.2.2.1.4 Cold ro13&g. Cold rolling of the shaft shall be performed after hot scrnlghtening and stress-reliavtng.

. 17

11.2.2.2 J-ocalizedheatinz (h t aDotQ.@.0 The hot spotting method is intended for straighconing used shafting only. HOt spOcting involves the iterative use of altomate heating and cooling cycles and provides a means of straightening a section of shafting aboard ship vith n ❑inimum of ❑achinery and equiptuenc. Ulmreas this method offers distincc advantages, it shall be employed with caution so that the shaftis not crackedor dnmnged. Hagneticparticleor dye pcnetranc testing, os applicable, as specified in 7.2 shrillbe performed nfcer hoc spotting is complatod.

11.2.2.2.1 Not $Pottinp proced~. The following hoc spotting procodurc shall be used. DeccraLnothe location and magnitude of tho bend in the shaft as specified in 11.2.1. Position tha bnnc section of the shofc with the bend on top (knee-up). Locate and ❑oniror dial indicators as specified in 11.2.2.2.2. Apply n conccntraccd local hear in a circular fashion over a dinumcer of about 2 to 3 inches at or ncor the cop of the bond. As tho ❑ocal expands with heat, the bond L.illincrease. The expanding metal will bo compressed by the restraining effecrs of the rest of chc shaft. Compressive stresses will be increased with heat input until compressive yielding cakas place. Uhen cooled, tensile stresses will develop in the area in which yielding occurred. Tensile stresses will act tO oPPOse the bend and partial straighteningwill occur. Ona application may be adequate for small bends while larger bands may roquiro a serlos of successive spots spread over an area ncrar the maximum run-out. The shaft shall be allowed to cool between each spot and the run-out shall be plotted as specified in 11.2.1.

3Trisallows evaluation of che effect of the previous hot spot and helps to locacc where the next spot should bciopplied. Post repair stress raliaf shall not be performed afcor hot spotting. Cold rolling (see 12.1.2) may noc be required.

11.2.2.2.2 Dial ind~. Before applying 10CO1 heat, four dial

indicators shall be located on the shrift. TWO dial indicators shall bo placed on the cop of the shaft each equidistant on each side of che bane region. Anrither dial indicacor shall be placed 90 degre.x from aach of the first two. The dinl indicators shell be locaced as far as praccical from cha area to be hoc spotted, but need noc be more than 10 feet discanc. Priorto applicationof heat, the dial indicators.shall be set co ❑easure distortion in either direction. After hot spotting is completed and the shaft has cooled to ambient camperacure, total indicated run ouc in the shaft shall be a few thousandths of an inch, opposite to the original run-out.

11.2.2.3 Cold S~. The mochods specified in 11.2.2.3.1 through

11.2.2.4 aro intended for uce during final machining operations or where it 1s nor feasible to hoc straighten. They may ba used on used shafting, and on new shaft-ing with prior approval (see lfI.6).

11.2.2.3.1 @ld IX?-. lhe location and magnitude of the bend in the shoft shall be determined as specified in 11.2.1. The shaft shall be supported approximately 1 to 2 feet on each sida of cho bond canter and positioned so that the high SPOC of the bend is downward (nc 6 o’clock). The shaft shall be peened on the top with sledge howmers, starting ac a point over cho center of tho bend and continued over che shaft in both directions as far as che supports. Peenhtg will raise the bent portion of the shaft to a common axis with the ends. After machining as specified in 11.2.2.3.1.1, additional straightening shall utilize protective coppar or stool placas, of sufficient thicknass co provont mcrring of the shaft surface, placed on tho shaft surface where blows are co be stmck.

18 “

HIL-STO-2191(SH)

11.2.2.3.1.1 M~ cold strninhconing. men the shaft

is within straightness rcquirement~ of the applicable shnfcing drawing. the shsfc shall be machined or ground Co remove any inadverconcpeening marks, buc in no casa shall the shaft diameter bo reduced by ❑ore than as specified in 10.3.1. If shafts are mnchincd or ground in regions which require cold rolling in accordance with che applicable shafting drawing, shafts shall be cold rolled after machining.

Af Cor ❑achining, shriftschall bo chockod for ncraighcnass as spocificd in 11.2.1 and re-ctrnightened if nccossnry.

11.2.2.3.2 wtion sunpg,KK. The shaft should be supported for scraighcen-ing by vibration as described below (sac figure 3). Ucchods used co support che shaft need not be limited to thoso specified as follows:

(a) Fasten one end of cha shaft to the face plate of a lathe or ocher dcvica. Suspend the shaft ac the center of bend from an overhead crane vith the maximun run-out facing dovn. Allow che ocher end co hang free.

(b) Susp.md chc shaft from an ovarhond crane wlch chc maximum run-out facing down and boch ends hanging froe.

(c) Support the shaft, with the run-out facing dovn, on blocks on cfther side of the cancer of bond and approximately 3 feet apart.

(d) Support the shaft in saddles on either side of the cencer of bend with tho run-out facing down, and tho point of maximum run-out supported with a jack.

11.2.2.3.2.1 VWWW&&IS. After che shaft has been supported properly, it shall be vibrated (vlolencly) by scrfklng it on cop ac both ends with a hesvy mnchlnisc’s hrmmmr or a light slcdgo. The combination of vibratory forces, and bending moments introduced by soLacted support points will causo che shafc to return to the origiml neutral axis. Proteccivo plates shall be required as specified in 11.2.2.3.1. Hachining or grinding shall be es specified in 11,2.2.3.1.1. If applicable, re-cold rolling of the shaft shall be performed nfcer aachining or grinding (see 11.2.2.3.1.1).

11.2.2.6 S2Eherm thOda. For alloy steels (see 6.2.2), straightening methods ocher chm as specifio~ heroin require approval (seo 16.ft). For carbon steels (see 4.2.1), oethods require review and approval by che cognizant authorized representative (see 14.6) prior co straightening.

12. SOLO ROLLINC

12.1 General r a iremencs. This section is applicable to shafting materials listed in 4.2.1 and ~.~.2 and shall be used as a guide for cold rolling of all steel shafting.

12.1.1 pew shem. When specified on applicable drawings, cold rolling of propulsion shaftfng shal1 ba porfonnod on elm afct?rend of new propulsion shafc sections. Cold rolling of new shaft eections shall be accomplished prior co cucting propellor keyways or installation of after strut sleeves.

t

MIL-STO-2191(SH)

12.1.2 . For refurbishedshafts, cold rollin+!shall be performed on previously col~ rolled surfaces vhich have been welded, hot straight-ened, cold .straightonednnd machined or ground, stress rolioved, or otherwise thermally created. If poseible, cold rolling of refurbished sections shall be accomplished prior to installationof after stint slaevos. Dummy keys (see 12.2.5) shrillbo fit to taprirsprior to cold rolling. Cold rolling rwd not bo accomplishedon shafting that fs straightenedaboard ship.

12.2 j@cedure.

12.2.1 Wsh reu.ircm~. llrearea of rho propellor shaft to be cold rolled shall have a 125 microinch root mean square or fine? finish before rolling

12.2.2 Roller sizes. Cold rolling shall bo accomplished using a 9-inch diameter hardening rollor vich a 1-1/2 inch crown radius bearing on rhe shafc.

lle hardening roller shall be opposed on tha opposite side of the shafr by a 9-inch diameter smoothing roller with a h-inch crovn radius.

12.2.3 Rotation su.@_&@ . ,llreshaftshallbe rotatedwith a surfacespeed of about60 feet per minuteand shallbo movod rhroughche rollersac a rate of feed of about1/16 inch for ench revolutionof the shaft.

12.2.6 Sh5f16.

12.2.6.1 t?ewshaf&. Cold rollingof mw propellershaftsectionsshallbe continuousfrom a point 12 inchesforwardof the forwardend of tho aftershaft sleeve to a point 2 inchesforwardof the afterond of che taper. One pass shall be made ovar the aron to be rolled.

12.2.4.2 Benoirodshafts. For existingshaft sections whoro it is noces-sriry to rerolltho shaftsections(see 12.1.2)rollingshall end 12 incheson eitherside of the area affected by che operation listedin 12.1.2.

12.2.5 ~nz tar.eredsections of ~. When rerolling of an existing capered section is roqutred, dummy keys shallbe fLctad co fillkeyways., The spoonedout area of the forvardend of the keyvayshallbe filledwith weld metaland stressrelievedprior co rollingco providen continuoussurfacefor the rollersto bear upon. The weldingprocedureshallbe as specifiedin section5.

The afterend of tha dummy key shallalso be weldedin placeam necessary to preventmovementduringrolling. The keyvaysled runnerend shallbe remachined and fairedto shaft diamater when the dummykey is ramovcd after rolling.

12.2.6 Mbricncw. 2%0 area to be cold rolledshellbe costed with an axtreme pressure lubricant during rolling.

12.2.7 Roller1oods. Rollerlends shall be as shown in tabloIII.

. 20

Yield point (lb/in*) (0.01 porcenc offset)

30,000 35,000 IJo,ooo 45,000 50,000 55,000 60,000 6S,000 70,000 75,000 ao,ooo 85,000 90,000

ISIL-STO-2191(SH)

TABLS III. Roller w.

Roller load (pounds) lB,500 20,000 21,500 26,500 30,000 32,750 36.000 40;000 lJ3,fboo 66,000 49,000 52,000 55,000

J/ tlacocinl

MIL-S-23284, ChlS5 6

KIL-S-23286, ChSS 3

HIL-S-232B6, ClaSS 2

MIL-S-2328b, ChSS 1, Ch5S 5

HIL-S-2328fI, class 6

&/ The roller load on the shaft shall be increased S1OV1Y from zero c.

the load specified in cablri111 starting2 inches ahend of the section to be rolled, and decreased gradually from the load specified in cable 111 to zero over a distrincoof 2 inches following the section to be rolled.

12.2.g ~Q. Upon complocion of cold rolling and machining the kaww+ S. the rolled area of the shnfc shall bo inkuected by munecic otrrcicle in~pe~t~on as specified in 7.2.

12.2.9 The amountof metal removed for final finishing

efcsr cold rolling shall be kept co a minimum and shall not be greater than 0.005 inch on the diameter. The ?educcion of the radius duo to cold rolling shall be

0.001 to 0.002 inch.

13. SHOT PEENINc REQUIREMENTS

13.1 ~hoc veenintzretirements. Flange fillet area which hos been weld repaired shall bo shoe peened aftar scrcss relief. Paaningshrillbe in accordance with MIL-s-13165 or HIL-R-81841 and co the incs.nsicyspecified therein. Ihe peoning shall include che entire curvaturo of che fillet and the entire circum-ference.

14. NOTES

(This section concoins information of a general or explanatory nature chac may be helpful, buc is not…