MIL-T-16420.pdf

MIL-T- 1 G 4 2OK (SHI

SUPERSEDING

MIL-T-16420J (SHIPS)

14 April 1978

4 March 1965 (See 6.6)

MILITARY SPECIFICATION

TUBE, COPPER-NICKEL ALLOY, SEAMLESS AND WELDED

(COPPER ALLOY NUMBERS 715 AND 706)

This specification is approved for use by the Naval Sea Systems Command and is available for use by all Departments and Agencies of the Department of Defense.

I. SCOPE

y! 1.1 Scope. This specification covers two compositions of round copper-nickel alloy tube for basic piping systems on surface ships and submarines as referenced in MIL-STD-777 and MIL-STD-438. Tube and pipe sizes permit the use of Naval fittings designed for brazed or welded connections.

# 1.2 Classification. Tube shall be of the following compositions, tempers, types, classes, and grades, as specified (see 6.1):

Composition:

70-30 copper-nickel (copper alloy no. 715).

90-10 copper-nickel (copper alloy no. 706).

Annealed.

Light drawn (alloy 706 only).

I - Seamless.

II - Welded.

Temper :

Type :

2 50 (50 pounds per square inch (lb/in ) maximum working pressure - type II Class:

only).

200 (200 lb/in maximum working pressure).

.3

700 (700 lb/inL maximum working pressure).

1650 (1650 lb/in maximum working pressure).

3300 (3300 lb/in maximum working pressure - type I only).

6000 (6000 lb/in maximum working pressure - type I only).

Special (tube which does not conform to tables III or IV with respect to

1 - Material supplied without heat identification.

2 - Material supplied with heat identification.

calculated wall-to-outside diameter ratio).

Grade :

1.2.1 Class 50 tube shall be furnished in alloy 706 only. Class 200 shall be furnished in either alloy 715 or 706, and the remainder of the classes in alloy 715 only.

# 1.2.2 Nonstandard (special class) tube shall be classified on the basis of its maximum calculated working pressure and identified with the next lower nominal pressure class listed in 1.2. Special class tube shall be specified by its nominal class number and "special".

Beneficial comments (recommendations, additions, deletions) and any pertinent date which may be of use in improving this document should be addressed to:

Commander, Naval Ship Engineering Center, SEC 6124, Department of the Navy, Washington, DC 20362 by using the self-addressed Standardization Document Improvement Proposal (üD Form 1426) appearing at the end of this document or by letter.

FSC 4710

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MIL-T- 1 6 4 2 OK (SH)

2. APPLICABLE DOCUMENTS

2.1 I s sues of documents. The fol lowing documnts , o f t h e i s s u e i n e f f e c t on d a t e of i n v i t a t i o n = i s or reques t f o r proposal , form a p a r t o f t h i s s p e c i f i c a t i o n to t h e ex ten t s p e c i f i e d here in .

SPECIFICATIONS

MILITARY

MIL-C-3993 - Copper and Copper-Base Alloy M i l l Products: Packaging of :

MIL-C-15726 - Copper-Nickel Alloy, Rod, F l a t Products ( F l a t Wire, S t r i p , MIL-1-45208 - Inspec t ion System Requirements.

Sheet, B a r , and P l a t e ) and Forgings.

STANDARDS

FEDERAL

FED-STD-151 - Metals: T e s t Methods.

FED-STD-185 - I d e n t i f i c a t i o n Marking of Copper and Copper Base Al loy

M i l l Products.

MILITARY

MIL-STD-105 - Sampling Procedures and Tables f o r Inspec t ion by At t r ibu te s .

MIL-STD-271 - Nondestruct ive Tes t ing Requirements f o r Metals.

MIGSTD-278 - Fabr i ca t ion Welding and Inspect ion; and Cas t ing Inspec t ion and Repair €or Machinery, Piping and Pressure Vessels i n Ships of t h e un i t ed S t a t e s Navy.

PUBLICATIONS

MILITARY

NAVSEA 0900-LP-003-9000 - Radiographic Standards f o r Production and R e p a i r

Welds.

(Copies of s p e c i f i c a t i o n s , s tandards , drawings, and pub l i ca t ions required by con t r ac to r s i n connect ion wi th s p e c i f i c procurement func t ions should be obta ined from t h e procuring a c t i v i t y or as d i r e c t e d by t h e con t r ac t ing o f f i c e r . ) the extent-i- Unless o therwise ind ica t ed , t h e i s s u e i n e f f e c t on d a t e of I 2.2 Other ub l i ca t ions . The fol lowing documents form a p a r t of t h i s s p e c i f i c a t i o n to

. i n v i t a t i o n f o r bids or reques t f o r proposal s h a l l apply.

AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)

A342 - Permeabi l i ty o f Feebly Magnetic Materials.

E8 - Tension Tes t ing o f Metallic Materials.

E29 - Recommpnded P r a c t i c e f o r Ind ica t ing Which Places of Figures A r e To Be

E340 - Methods f o r Macroetching Metals and Alloys.

Considered S i g n i f i c a n t i n Spec i f ied Limit ing Values.

(Applicat ion for copies should be addressed t o t h e American Socie ty f o r Tes t ing and Mater ia l s , 1916 Race S t r e e t , Phi lade lphia , PA 19103.)

AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)

831.1 - Power Piping.

(Applicat ion for cop ie s should be addressed t o t h e American Nat iona l Standards I n s t i t u t e , (Technical s o c i e t y and t e c h n i c a l association s p e c i f i c a t i o n s and s tandards are gene ra l ly

1430 Broadway, New York, NY 10018.)

a v a i l a b l e f o r r e fe rence from l i b r a r i e s .

and using Federal agencies . )

They are a l s o d i s t r i b u t e d among t e c h n i c a l groups

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MIL-T-LbY20K L I ? m 7 7 9 7 9 0 b O272220 ô m

Copper a l l o y No. 106

MIL-T-16 420K (SH)

Copper a l l o y No. 715

3. REQUIREMENTS

f u l l y annealed

3.1 Manufacture.

Over 4-1/2 50,000 16,000 30

Up t o 4-1/21 i n c l u s i v e 38,000 15,000 30 Over 4-1/2 38,000 13,000 30

# 3.1.1 T y ~ e I tube . Type I tube may be h o t or co ld worked, or both , and s h a l l be w e l d -free. Tube s h a l l be f in i shed by such co ld working or machining t o s i z e and anneal ing as may be necessary t o meet t h e p rope r t i e s s p e c i f i e d here in .

requirements is prohib i ted .

s h a l l be either f u l l y annealed c l ean or annealed and ac id cleaned. When l i g h t drawn a l l o y 706 tube is furn ished , t h e tube s h a l l be co ld drawn a f t e r f i n a l anneal and p i ck le .

# 3.1.2 e II tube. Type II tube s h a l l be preformed from copper-nickel a l l o y f l a t p roducts con&iz m L - C - 1 5 7 2 6 and seam welded along a s i n g l e long i tud ina l a x i s .

I n t e r n a l and e x t e r n a l f l a s h s h a l l b e removed by s c a r f i n g and t h e r e s h a l l b e no c rev ice i n t h e weld seam v i s i b l e t o t h e unaided eye. Tube produced from f u l l y annealed shee t , s t r i p , or plate s h a l l be of t h e temper r e s u l t i n g from forming and welding opera t ions pro-vided it meets t h e mechanical proper ty requirements of 3.3 o therwise , t h e tube s h a l l be reannealed c l ean or reanhealed and acid-pickled. L igh t drawn tube ( a l l o y 106 only) s h a l l be cold drawn a f t e r f i n a l anneal and p i c k l e t o conform to t h e s p e c i f i e d temper.

# 3.1.3 Contaminants, such as s u l f u r o r su l fur -conta in ing compounds from l u b r i c a n t s used i n fonning, machining, or o t h e r processing, or from marking materials used f o r in-procese i d e n t i f i c a t i o n , s h a l l b e removed prior t o any h e a t t rea tment of t h e ma te r i a l .

S i z ing o f ends t o meet dimensional Fu l ly annealed tube s h a l l be completely r e c r y s t a l l i z e d and l i g h t -----drawn

45,000 35,000 1 5

I Percent maximum (un le s s shown as a range or minimum) I

Copper ( inc luding s i l v e r ) , minimum

Nickel ( inc luding coba l t )

I ron Man ganes e Zinc Lead Phosphorus Su l fu r Carbon Copper p lus elements w i th s p e c i f i c l i m i t s , minimum

86.5

9.0 - 11.0

1.0 - 1.8 1.0 O .50 o . o 2 0 .02 o .o2 O .O5

99.5

65.0

29.0 - 33.0

0.40 - 1.0 1.0 O .50 0 . 0 2 0.02 o . o 2 O .O5

99.5

3.3 Mechanical requirements.

# 3.3.1 Tens i l e properties. Tens i l e p r o p e r t i e s s h a l l conform t o t a b l e II.

TABLE II. Tens i l e p rope r t i e s .

I %Gr 1 Outside b e n s i l e s t r e n g t h , O .5 pe rcen t o f f s e t I Elongat ion i n I 1 Yield s t r e n g t h a t

I or extens ion under-inches (min. 1 I load lb / in2 (min.)

2 i nches or 4D, percent (min. 1 I lb / in2 f u l l y 4-1/2, 50,000 I 18,000 1 30

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MIL-T-Lb l l20K 47 D 999990b 0272223 T W

MIL-T- 16 4 20K (CH)

3.3.2 Expansion 0 f l a t t e n i n q .

f l a t t e n e d at r o o m temperature without developing cracks or f laws v i s i b l e t o t h e unaided eye when t e s t e d as apec i f i ed i n 4.4.2.2.

s t and t h e f l a t t e n i n g test.

Annealed tube s h a l l b e capable of being expanded or

Light drawn tube s h a l l n o t be requi red t o with-

3.4 Nondestructive requirements.

3.4.1 H d r o s t a t i c ressure . Class 50 and 200 tube which is n o t requi red t o be u l t r a -s o n i c a l l y i n - a h e wi th 3.4.3 and, when s p e c i f i e d (see 6.1) , tube s u b j e c t to u l t r a s o n i c in spec t ion a h a l l be h y d r o s t a t i c a l l y t e s t e d a s s p e c i f i e d i n 4.4.3.

a h a l l be p e r f e c t l y t i g h t under test p res su re and show no bulges , c racks , f laws, porous p laces , or o t h e r de fec t s .

r e q u i r e m e n t i Ö d ? d h 9 & - ~ 3 ~ 0 f o r class 1 product ion welds when t e s t e d as s p e c i f i e d i n 4.4.0.

3.4.3 Ultrasonic . Each f i n i s h e d tube , as requi red by 3.4.3.1 through 3.4.3.3, s h a l l be inspec ted u l t r a s o n i c a l l y by t h e shear wave (angle-beam) technique s p e c i f i e d i n 4.4.9. This i n spec t ion s h a l l be conducted i n two oppos i te c i r cumfe ren t i a l d i r e c t i o n s , When spec i f i ed (aee 6.11, an a l t e r n a t e nondes t ruc t ive tes t method may be s u b s t i t u t e d by t h e manufacturer at the op t ion of t he procuring a c t i v i t y . The method s h a l l be capable o f de t ec t ing i n s i d e and ou t s ide su r face de fec t s , and subsur face d e f e c t s , equ iva len t t o or sma l l e r t han those s p e c i f i e d i n 4.4.9.3.

Each tube

3.4.2 Radio r a h i c (t II tube ) . Seam weld s h a l l be radiographed and s h a l l m e e t t h e

3.4.3.1 Nominal class tube (t e I) . Alloy 715 tube (class 700, 1650, 3300, and 6000) and. when s m c ~ s ~ l ~ l l Ö % ~ and 706 tube (class 200) s h a l l be cont inuously scanned u l t k o n i c a l l y i n accordancë wi th MIL-STD-271 and s h a l l pas s t h e acceptance criteria apec i f i ed i n 4.4.9.8.

apec i f i ed (see 6 .1) , a l l o y 715 tube ( c l a s s 200) and a l l o y 706 tube (class 50 and 200) s h a l l be cont inuoualy scanned u l t r a s o n i c a l l y i n accordance wi th MIL-STD-271, except a t t h e weld sem, and a h a l l pass t h e acceptance c r i t e r i a s p e c i f i e d i n 4.4.9.8. When requi red (see 6.11, f i a t products from which t h e tubes are fab r i ca t ed s h a l l be of u l t r a s o n i c test q u a l i t y i n accordance wi th MIL-C-15726.

nonstandard t b - 6 0 C a - e e mega= me u l t r a s o n i c requirements s p e c i f i e d i n

3.4.3.1 or 3.4.3.2.

3.4.3 s h a l l be examined f o r laminar d i s c o n t i n u i t i e s by u l t r a s o n i c gaging f o r compliance wi th t h e w a l l th ickness requirements of 3.8.2. Laminar d i s c o n t i n u i t i e s a h a l l be considered as reduct ions of w a l l th ickness .

Seamless tube s h a l l be weld-free when e t c h t e s t e d as s p e c i f i e d i n 4.4.4.

The t es t is requi red when t h e tube is procured from a m i l l which manufactures both welded and aeamless tube and when t h e m i l l does no t mark t h e tube i n accordance wi th 3.10 a t t h e f a b r i c a t i n g a i t e .

p e r m e a b i l i $ k Ü b ~ a d n ~ w & . 4 . 5 s h a l l n o t exceed 1.05 mv.

Unleas otherwise s e c i f i e d i n the c o n t r a c t or o rde r , t h e s tandard dimensions and weights a h a l l be as shown f n table III or IV.

III o r I V , t h e maximum working preasure s h a l l be determined by t h e procuring a c t i v i t y i n accordance wi th equat ions 4 and 4A of ANSI 831.1. The a d d i t i o n a l th ickness allowance, A, a h a l l be 0.050 inch t o compenaate f o r corroaion/erosion or f o r t h inn ing o f t h e w a l l due to threading.

I 3.4.3.2 Nominal c l a s s tube (we 11). Alloy 715 tube (class 700 and 1650) and, when

3.4.3.3 S ecial class tube (t I and II). Based on i t s nominal class (see 1.2 .21 ,

3.4.3.4 Laminations. Tube requi red t o meet t h e u l t r a s o n i c requirements s p e c i f i e d i n

3.5 Etch.

# 3.6 Ma etic n n e a b i l i t ( a l l 706 on1 1 . When s p a c i f i e d (aee 6.11, magnetic

3.7 Dimensions weights. S i ze of t ube r equ i r ed s h a l l be a s s p e c i f i e d (see 6.1).

3.7.1 Nonstandard s i z e s . When tube is ordered t o dimensions o t h e r than those i n t a b l e

3.8 Tolerances.

3.8.1 Overweight. Maximum t o l e rance permi t ted f o r overweight of any lot of tube is 10 percent , aasuming copper-nickel a l l o y 715 or 706 weighs 0.323 pounds per cubic inch.

3.8.2 Wall ickness . When determined as Spec i f ied i n 4.4.7, t h e tube w a l l a t any p o i n t a h a l l - k a n t h e th ickness r equ i r ed i n table III or I V . Maximum to l e rance on w i l l th ickness p e r tube s h a l l no t exceed an overweight allowance of 13 peraent of t h e ca l cu la t ed ue ight .

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MIL-T-LbV20K 47 m 7977706 0272222 1 W a al U U 4 a c

P) m .d a s O m m

U U u E

U

&I a E -e c, m rl I-

B -a c

W 0 , ml 8;

U U U l 1 1 I 1 1 1 1 1 l 1 I m m m m o o m m m o m ~ o o o m e o ~ o o ~ I I I I I I I I I I I I fi ~ m m m ~ ~ e m o ~ o r n o ~ m ~ m ~ e m w i I I I I I I I I I I I I c: . . . . . . . . . . . . . . . . . . . l I l 1 I l I I 1 1 1 I I o O 0 0 d r l d ~ N N N ~ m m m O O m m w I - l l l l l l l l l l l l l u 0 a C O i c o C U

I I I I I I o

I l I l I I c l m l l m w u . l w 1 w 1 w 1 ~ I - I4 1 0 1 1 0 0 0 1 0 1 0 1 0 1 0 0

I ' I I . . . 1 . I . ) . I . .

fi I m I I m m m I m I m l m I "

D

I I I I N I ~ e ~ m m m m i m m m r n r l ~ w ~ m m d d ~ I I . I . . . . . . . . . . . . I I I

~ i ~ m e m - r n o ~ m r l - m ~ I I r l r l r l N N m l I I a m o m m 0 0 m 0 0 0 0 0 m 0 0 0 0 m 0 m 0 0 0 0 m m m m m o o o o o <Y VII-O O ~ I - ~ * O ~ ~ r l O ~ O O ~ O ~ 0 0 0 0 W N N N N ~ ~ O O O 2 d cym- m m w - w o o N m m w m o m m m m o m o m u . w w w I - I - o o 0 u O d d r l d d r l d ~ ~ ~ ~ m ~ - ~ m w ~ - m m o ~ * m w

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MIL-T-LbLl20K Ll7 = 99999Ob 0 2 7 2 2 2 3 3

MIL-T-16420K (CH)

TABLE I V . Dimensions and weights of copper a l l o y number 706 tube ( type I and type II un le s s o the rwise i n d i c a t e d ) .

Outside diameter

Inches

0.250 .500 -540 .675 .840

1.050 1.315 1.660 1.900 2.375 2.875 3.500 4.000 4.500 5.000 5.563

7.625 8.625 9.625

10.750 12.750 14.000 15.000 16.000 18.000 20.000 22.000 22.750 30 .O00 40.000

6.625

Class 50 - t ype II

Wall

(min.) c a l c u l a t e d th i ckness Wt./ft. t h i ckness Wt./ft.

c a l c u l a t e d (min. 1 I Inch q 0 . 0 3 5 2’ .O35

.O65

.O65

.O65

.O65

.o72 ,072 ,083 .O83 .O95 .O95 .lo9 .120 .125 .134 .140 .151 .187 .187 .250

.O65

Pounds

0.092 .198 .376 ,483 .613 .779 .989

1.39 1.60 2.32 2.82 3.94 4.51 5.83 7.12 8.28

10.6 12.2 15.3 21.5 24.0

38.0 ---- ---- ---- ---- ---- ---- ---- ---- ----

/Tube wi th o u t s i d e diameters 0.250 inch through 2.875 inches a v a i l a b l e i n type I only.

Y I n t e n d e d f o r hydrau l i c service , no co r ros ion allowance included.

3.8.3 Avera e o u t s i d e diameter. Pe rmis s ib l e v a r i a t i o n s i n average outside diameter of tube s h a l d m e a i n table V.

TABLE V. Average o u t s i d e diameter t u b e t o 1 e r a n c e s . y

I Outside diameter I Permissible v a r i a t i o n

I P l u s

Inches

0.250 t o 0.675, i n c l .

Over 0.675 t o 1.050, i n c l Over 1.050 t o 1.900, i n c l Wer 1.900 t o 2.875, i n c l Over 2.875 t o 4.000, i n c l Por 4.500 For 5.000 Fot 5.563 For 6.625 For 7.625 For 8.625

See foo tno te a t end o f table.

Inch o .o

.o

.o

.o

.o

.o

.o

.o

.o

.o

. o

Minus

Inch O .O050

.O060

.O080 . O10

.o12

.O15

.O16

.o17

.o20

.O23

.O26

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M I L - T - L b q Z O K q7 9997906 02722211 5

MIL-T-16420K (SH)

TABLE V. Average ou t s ide diameter tube to l e rances .y (Continued)

Outside diameter Permiss ib le v a r i a t i o n

P lus I Minus

Inches Inch Inch For 9.625 o .o O . 026 For 10.750 .o .O30 For 12.750 .o .O35 Over 12.750 .o 1 percent m a x i m u m and minimum ou t s ide diameters as determined a t any cross -sec t ion of t h e tube.

The average ou t s ide diameter of a tube is t h e average of t h e

3.8.4 Weld seam (t e II tube ) . Outside weld reinforcement s h a l l be smooth f o r t h e f u l l l ength r t h a ë ? % n a d x d may be f l u s h wi th t h e i n s i d e s u r f a c e or have a uniform k i n f o r c i n g crown not t o exceed t h e to l e rances of table V I .

TABLE V I . Weld seam to le rances ( type II tube).

Thickness of weld crown on Wall th ickness i n s i d e diameter (max. 1

Under 0.250

0.250 to 0.500

0.500 and over 3/32

3.8.5 Length.

3.8.5.1 Unless otherwise s p e c i f i e d (see 6.11, t ype I tube s h a l l be furn ished i n m i l l l eng ths and type II tube s h a l l be furn ished i n lengths of 1 2 t o 24 f e e t w i t h a t o l e rance of p l u s or d n u s 6 inches.

furn ished i n s p e c i f i c l eng ths or t o any p a r t i c u l a r schedule of l eng ths agreed upon between manufacturer and t h e procuring a c t i v i t y .

M i l l l eng ths shall have a maximum leng th of 25 f e e t wi th a permi8sible v a m i & l u s 1 inch. The s h o r t e s t permiss ib le l eng ths and t h e minimum percent by weight of t h e longer l eng ths i n any l o t or shipment s h a l l be as s p e c i f i e d i n table VIX.

greater than 25 f e e t may be suppl ied as m i l l l engths .

When s p e c i f i e d (see 6.11, o r on t h e drawings, tubes s h a l l be

# 3.8.5.2 M i l l l e n th s .

When agreed upon between t h e manufacturer and t h e procur ing a c t i v i t y , l engths

3.8.5.2.1 S c i f i c l e n ths. Where tubes a r e ordered t o s p e c i f i c (exac t ) l engths , the tolerances s a &e V I 1 1 s h a l l apply.

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MIL-T-LbV20K 47 = 9999906 0272225 7

Feet

OO..

-.o.

..o- ---.

1 2 1 2 1 2

1 2

1 2

1 2

1 2 1 2

1 2

1 0 1 0 1 0 1 0 1 0 1 0

3-1/;

3-1/:

3-1/:

--.o

.<reir

--œ-

--o.

Outs ide diameter onger engths max. )

Snches O 125 . 250 . 375

,405 500 . 540

,675 , 750 , 840

1.000 1.050 1.250 1.315 1,500 1.660 1.900 2.000 2.375 2,500 2.875 3.500 4.000 4.500 5.000 5.563 6.625 7.625 8.625 9.625

1 0 . 750 12.750

F e e t

-œ --

1 8 1 6 1 6 1 4

0-

-œ

0.

0.

O 0

0-

Wall t h i c k n e s s

(min.

I n c h

O .O35 00-

0-0

1110-

,035 .O65 .O65

.O65

.O65

.O65

.O72 ,072

.O83

.o95 .o95 ,109 . 120

-134 . 140 . 1 5 1 . 187 . 1 8 7 . 250

.o.

œ.0

--o œœ.

. 0.

C l a s s 200

Length (min. 1

Feet

.I).--

--o- ---.

1 2 1 2 1 2

1 2

1 2

1 2

1 2 1 2

1 2

1 2 1 2 1 2

5.1,’;

3-1/¡

--œ.

..o.

..-o

-.o.

Longer Length8 (max. 1

Feet

-œ

-0

-I

1 8 1 6 1 4 1 2 1 0

-0 e.

0-

0-

Percent by weigh t of l o n g e r l engths (min.)

œ.

-0

0-

6 5

1 0 œ.

0-

-0

0-

0 -o.

TABLE V

Class 700

Wall t h i c k n e s 8

(min.)

Inch o-- . -- --- O .O65

,065 . 072

,072

.O83

.O95

.o95 . 109

. 120

. 1 3 4 ,165 . 180 .203 ,203 . 220 . 259 . 284 . 340 . 340 . 380 . 4 5 4

-œ.

0-0 o-œ

Length (min. 1

Percen by Wei of l o n l e n g t (min.

o- ..

SO

1 0

0-

0-

0-

0-œ-

0- -- -

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TABLE VII. Schedu le of m i l l l e n g t h s ( type I onl;

ness n.

ch

6 5

8 3 o9

4 0

Length (min .

F e e t --e-o---

--e- - --- 1 2 1 2 1 2

1 2

1 2

1 2

1 2 1 2

1 2

1 0 1 0 1 0 1 0 1 0 1 0

3 -1/ 3-1/:

3-1/;

--e-

C l a s s 700 mger e n g t h s max . 1

F e e t --o- --o-

1 8 1 6 1 6 1 6 1 4 1 0

O 0 o-

P e r c e n t by w e i g h t of l o n g e r l e n g t h s (min. 1 o-œ- -- O 0

SO

-0

IO

O 0

O 0

-o -- -o

W a l l t h i c k n e s s

(min. 1

I n c h o--

-0- --- 0.035

.O42 . 049

.O58

.O58

.O72

.O83

.O95 ,095

,134 ,148 ,165 ,180 ,203 , 250 ,284

340 . 380 . 425 --- ---o-- --- ---o--

C l a s s 1650

Lengtl (min. I

F e e t o- -- -- -- 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 0 1 0 1 0 1 0

4 -- -- -- --

O 0 _-

Longer l eng th i ( m a x . 1

F e e t o-

1 8 1 8 1 8 1 8 1 8 1 8 1 6 1 4

7 -- --

-o

O 0 -- --

P e r c e n t by w e i g h t of l o n g e r l e n g t h s (min.)

-œ

-0

-0

-0

6 5

' 30 -0 -- -- -- -- -. --

W a l l :hickness

(min. )

Inch 0.028 .O35 ,049 .O58 . 072 . 072 . 095 e109 . 120 . 134 -148 -165 -180 ,203 220 . 250

-284 340 . 340 . 380

,4575 --- -o. ---o-- --. --- --- --- --- ---

C l a - Lengt (min.

F e e t 1 2 1 2 1 2 1 2 1 2 1 0 1 0

-0 -- 00 -.

o- -- -- --o- --

9/10

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!nt i ight nger

- t h S ,. 1

-0 -- -- .o ao

-o --o-

I O

O 0 --

MIL-T-Lb'420K '47 797990b 027222? O

MIL-T-16420K (SH)

Wall :h icknes E

(min. )

Inch

0.028 . 035

.O49

.O58 . 072 , 072 095 . 109 . 120 , 134 ,148 .165 . 180 , 203 . 220 250 . 284 . 340 . 340 , 380 . 4575 -0-

--o

-.o

-00 e-- --- -.o .-- --e ---

Class 3300

Length (min.

F e e t

- œ

-0 -- -- -o -- -- -I .- -0

Longer lengths (max. )

Feet 10 --w o

-0

-0 -- -- -- -- -- --

Percent by weight of longer l engths (min.)

6 0 20 --

Wall th ickness

(min. 1

Inch O .O28

.O58

.O83

.O95 120 . 120 m148 .165 .203 . 220 -238 . 204 . 300 . 340 . 380 . 425 ,454 .5201 ,5474 -0-

--o --- --- --- --- --- 0-0

--o o--

Class 6000

Length (min.)

F e e t 3 -- --o- -. -. -- -- .o -- -- I.

O 0

Jon ge r lengths (max 1

F e e t

- œ

-0

0 -w-

-0

O 0 -- -- .o

.o

O 0 --

Percent by weight of longer lengths

(min. 1

II -- -- -- -- -- -- .-

.o

-0 --

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MIL-T-ZbY20K Y ? 997790b O272228 2 9

Length

MIL-T-16 420K (CH)

i/ TABU V I I I . Specific length tolerances.-

For o u t s i d e For o u t s i d e d i ame ters For o u t s i d e diameters over 1 t o diameters up to 1 inch , 4 inches , over 4 inches

I n ch Inch Inch i n c l u a i v e i n c l u s i v e

I m g t h , f ee t9

Up t o 6 inches, i n c l .

Over 6 inches to 2 feet, i n c l .

Over 2 f e e t t o 6 feet, i n c l .

O v e r 6 f e e t t o 1 4 feet, i n c l .

O v e r 14 feet

Maximum curva ture (depth of arc), inch I

1/32 1/16 3/32

1/2

Over 3 to 6, i n c l . 3/16 Over 6 t o 8, i n c l . 5/16 Over 8 to 10 , i n c l . 1/2

1/8 1 /4

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MIL-T- 16 420K (SH)

3.10 I d e n t i f i c a t i o n markin . When s p e c i f i e d (see 6 .1) , each tube s h a l l be marked i n + accoräance w i t h FE D - S T D - l s d t h e f ollcnring i d e n t i f i c a t i o n :

(a) Manufacturer's name, trademark, or symbol.

(b) Alloy des igna t ion .

(c) L o t number.

(d) Temper, type, class, grade, and h e a t number ( f o r grade 2 t ube ) .

(e) Dimensions (ou t s ide diameter and w a l l t h i ckness ) .

( f ) Spec i f i ca t ion number.

3.10.1 Marking by m a n s of v ib ra to ry tool, electrochemical e t ch ing , or by p a i n t or ink a t e n c i l i n g i a acceptab le , provided the fol lowing condi t ions are met:

(a) Vibratory marking tools s h a l l be f i t t e d w i t h a carbide marking p o i n t , or equiva len t , and shal l be adjus ted t o provide a l e g i b l e , shal low, rounded imptession no t exceeding 0.010 inch i n depth.

r ad ius s h a l l be 0.005 inch.

E l e c t r o l y t e used f o r electrochemical e t ch ing s h a l l n o t conta in i n excess of 250 p a r t s per m i l l i o n (p/m) each o f t o t a l halogens, s u l f u r , and lead.

Marking f l u i d s s h a l l n o t con ta in mercury or halogens i n excess of 200 p/m, s u l f u r i n excess of 250 p/m, phosphorus, and any low melt ing p o i n t e lements i n other than trace amounts (less than 100 p /m) .

No marking sha l l reduce t h e w a l l th ickness of t h e tube below t h e s p e c i f i e d minimum to le rance .

Tube w i t h nominal w a l l t h i ckness less than 1/8 inch and l i g h t drawn a l l o y 706 tube shall be marked only by e lec t rochemica l etch. Electric a r c marking and die atamping of any k ind i s prohib i ted .

The marking t o o l t i p minimum

(b)

( c )

(a) (e)

3.11 V i s u a l Md

exanri nation- f iG3 dimensional examination.

i n 4.3.1 and 4.3.2.

Tube s h a l l pass t h e v i s u a l and dimensional

3.12 Workmanshi . Surface of a l l tubes shal l be smooth, c l ean , and f r e e of cracks, l a m i n a t i o n a h - , scale and other i n j u r i o u s defec ta t o t he maximum e x t e n t possible as revealed by visual examination. Tube a h a l l be of proper dimensionce w i t h ends c u t square and f r e e of burr8 and s h a l l have a su r face roughness no t g r e a t e r than 1 2 5 microinch, cen te r l i n e average.

mandrel, and die or roll marks w i l l n o t be considered i n j u r i o u s d e f e c t s provided t h e imperfec t ions do no t reduce the w a l l t h i ckness below t h e minimum s p e c i f i e d i n 3.8.2.

Pennias ib le de fec t a i n f i n i s h e d tube sha l l be randomly d i s t r i b u t e d over t h e tube sur face .

Sur face imperfec t ions such as handl ing marks, s t r a i g h t e n i n g marks, l i g h t

4. QUALITY ASSURANCE PROVISIONS

4.1 h s n s i b i l i t f o r i n s ec t ion . Unless otherwise specified i n t h e con t r ac t , the c o n t r a c t o r I s ? e s p o n s i b f e ~ r + r m a n c e of a l l in spec t ion requirements as s p e c i f i e d harmin.

other facilities s u i t a b l e for the performance of t h e in spec t ion requirements specified here in , The Government reserves t h e r i g h t t o perform any of the iMprCtiOn# set f o r t h i n the s p e c i f i c a t i o n where such in spec t ions a r e deemed necessary to Usure auppl iea and service. conform t o prescr ibed requirements.

system accep-ëkër-nt for supp l i e s and s e r v i c e s covered by t h i s s p e c i f i c a t i o n .

The inapec t ion aystem shall be i n accordance w i t h MIL-1-45208 (see 6.1) .

Except as o t h e r v i s e s p e c i f i e d i n t he c o n t r a c t , t h e c o n t r a c t o r may use h i s own or any

. w l e a a disapproved by the Government.

# 4.1.1 Ins c t i o n 8 s t e m . The con t r ac to r shall provide and maintain an i n spec t ion

4.2 Q u a l i t y conformance inspec t ion .

4.2.1 Inspec t ion E.

4.2.1.1 Grade i.

4.2.1.2 Grade 2.

A lo t shall c o n s i s t of the q u a n t i t i e s of t he tube of t h e same a l loy , A lo t s h a l l c o n s i s t of the q u a n t i t i e s o f tube o f t h e same a l loy , . t ype , type, c laa8 , a n m m s p e c i f i e d i n table XI and o f f e r e d f o r de l ive ry a t the same t i m e .

Class, and a i z e spec r f i ed i n table XI, of fe red f o r de l ive ry a t t h e same t i m e and i d e n t i f i a b l e by dl1 record8 as oc ig ina t ing from one or more h e a t s , as necessary, which conform to the chamical requirements i n table I.

1 2

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MIL-T-LbLIZUK 47 977770b 0272230 O

12-3/4

O v e r 12-3/4

1,200

4.2.2.1 S l i n f o r d e s t r u c t i v e tests. The number of samples s h a l l be s e l e c t e d i n accordance wi&%dXTfor the d e s t r m e tests s p e c i f i e d i n 4.4.2.1, 4.4.2.2, 4.4.4, and 4.4.5.

S i ze of l o t ( f e e t )

Up t o 50 51 t o 1,600 1,601 t o 4,000 4,001 t o 10,000 10,001 t o 25,000 25,001 to 62,500

TABLE XII. Sampling f o r d e s t r u c t i v e tests.

t I I

Number o f samples t e s t e d

1 3

# 4.2.2.2 Camplin f o r v i s u a l examination. For c l a s s 50 and 200, a r e p r e s e n t a t i v e sample of tubes s h a l l be sel&- f r o r n a c h insDect ion l o t i n accordance wi th MIL-STD-105 and s h a l l be v i s u a l l y examined as s p e c i f i e d i n 4.3:l.

4.2.2.2.1 For clasres 1 0 0 , 1650, 3300, and 6000, a l l tubes s h a l l be v i s u a l l y examined a8 s p e c i f i e d i n 4.3.1.

4.2.2.3 S l i n for dimensional examination. For class 50 and 200, a r ep resen ta t ive sample of t u b e M e selected from each in spec t ion l o t i n accordance wi th MIL-STD-105 and s h a l l be measured as s p e c i f i e d i n 4.3.2. The samples s e l e c t e d f o r dimensional examination may be t h e same as those s e l e c t e d f o r v i s u a l examination. For c l a s s e s 1 0 0 , 1650, 3300, and 6000. a l l tubes s h a l l be measured as s p e c i f i e d i n 4.3.2.

I

# 4.2.2.4 Sampling f o r chemical ana lys i s .

i of PED-STD-151 o m - o u n c e sol id sample s e l e c t e d and prepared i n accordance w i t h method

4.2.2.4.1 Grade L.

112 of FED-STD-151 s h a l l be t aken from t w o tubes Se lec t ed a t random from each l o t €or the a n a l y s i s s p e c i f i e d i n 4.4.1.

sulfur content , each hea t or i n g o t from each pour s h a l l be sampled.

Two ounces of c l e a n ch ips s e l e c t e d i n accordance wi th method 111

Por t h e purpose o f chemical a n a l y s i s €or phosphorus and

1 3

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MIL-T-l+6 420K (CH)

4.2.2.4.2 Grade 2. For continuous i n g o t c a s t i n g f a c i l i t i e s , t w o tubes s h a l l be s e l e c t e d , one tube from t h e f i r s t pour and one tube from t h e l a s t pour of e a c h h e a t t o produce t h e lot .

I f there i s one pour, or one tube i n a l o t , on ly one tube s h a l l be requi red .

cont inuous i n g o t c a s t i n g f a c i l i t i e s , one sample s h a l l be obta ined from t h e h e a t dur ing pouring or subsequent processing.

def ined BB a l l ma te r i a l from t h e same hea t .

h e a t or i ngo t , b u t are not requi red t o be determined on t h e f i n i s h e d product .

t ube s h a l l be e d .

radiographed every 50 f e e t of t h e o v e r a l l welding seam length .

For s e m i -

I n t h e l a t te r case, a l o t f o r chemical ana lys i s s h a l l be Phosphorus and s u l f u r s h a l l be determined on t h e

4.2.2.5 Radio r a h ( type 11 tube). The e n t i r e seam weld of a l l class 700 and 1650 For ea-t o f class 50 and 200 tube, t h e weld seam s h a l l be

4.3 Examination.

4.3.1 Visual . Each sample tube or a l l tubes , as app l i cab le , s e l e c t e d i n accordance wi th 4.2.2.2- be v i s u a l l y examined i n accordance wi th table X I I I t o v e r i f y conformance w i t h t h i s spec i f i ca t ion .

4.3.2 Dimensional. Each sample tube o r a l l tubes , as app l i cab le , selected i n accord-ance wi th 4.2.2.3 s h a l l be dimensionally measured i n accordance wi th table X I I I t o v e r i f y conformance wi th t h i s s p e c i f i c a t i o n .

TABLE X I I I . C l a s s i f i c a t i o n of d e f e c t s i n accordance wi th the d e f i n i t i o n s of MIL-STD-105.

Categor ies Defects

Major:

10 1 10 2 10 3

10 6 10 8

1 1 0

Minor :

Class (lb/in' working p res su re ) n o t as spec i f i ed .

Type (seamless or welded) n o t as s p e c i f i e d .

Material n o t processed as requi red ; s u r f a c e n o t smooth, no t of uniform th i ckness , n o t free from welds ( type I ) , i n j u r i o u s seams, grooving, i nden ta t ions , p i t s , c racks o r scale.

Outside diameter n o t as s p e c i f i e d ; v a r i a t i o n ex-ceeds t h e al lowable limits.

W a l l t h i ckness a t any p o i n t less than t h e s p e c i f i e d mi nimum.

Length n o t w i t h i n s p e c i f i e d limits.

Tube n o t commercially s t r a i g h t .

Ends no t c u t square or free from burrs.

Grooves, s c ra t ches , i nden ta t ions , and p i t s exceed al lowable l i m i t s .

Marking, s p e c i f i c a t i o n number, o r manufacturer ' s coding and i d e n t i f i c a t i o n des igna t ion missing, i n c o r r e c t , i l l e g i b l e or n o t p r i n t e d and r ecu r r ing ly loca ted as spec i f i ed .

Packing n o t as requi red .

4.3.3 Remval of defec ts . When condi t ion ing ope ra t ions are requi red i n accordance

Repair by welding is permiss ib le f o r wi th 3.9, t h e t i ö n - s shall be re inspec ted by t h e nondes t ruc t ive in spec t ion technique used i n o r i g i n a l l y d e t e c t i n g t h e de fec t .

t ype II tube only and s h a l l be i n accordance w i t h MIL-CTD-278.

4.4 Tait procedures.

4.4.1 Chemical a n a l sis. A test sample s h a l l b e taken from each tube or i n g o t spec i -f i e d i n 4.2.2.4 f or &analysis. E i t h e r t h e w e t chemical method 111 or t h e spectro-graphic method 112 of FED-STD-151-may be used.

s h a l l be the basis for acceptance. I f any sample f a i l s t o m e e t t h e requirements of t a b l e I , this s h a l l be cause f o r r e j e c t i o n of t h e l o t represented by t h e sample.

I n case of d i spu te , t h e w e t chemicai method

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I

MIL-T-LbLIZOK LI7 m'799990b 0 2 7 2 2 3 2 4 m

HiL-T-l6420K(SH)

4.4.2 T e s t f o r mechanical p r o p e r t i e s .

4.4.2.1 Tension test. A tens ion test specimen s h a l l be c u t from one end o f each sample s e l e c t e a i n a c c m n c e with 4.2.2.1 and s h a l l be prepared and t e s t e d i n accordance with ASTM E8 f o r conformance w i t h 3.3.1.

c 4.4.2.2 E ansion or f l a t t e n i n test. T e s t s e c t i o n s s h a l l be c u t from one end of each tube s e l e c t e d h i é a d . - i . o r t h e expansion test, t h e tube s h a l l be expanded on a hardened and ground, tapered, steel p i n having an included angle of 60 degrees t o 30 percent of i ts i n s i d e diameter. A s an a l t e r n a t i v e t o t h e expansion test f o r tube over 4 inches i n o u t s i d e diameter, a s e c t i o n 4 inches i n length s h a l l be c u t from t h e end of t h e lengths f o r a f l a t t e n i n g test.

times the w a l l th ickness w i l l p a s s over t h e tube f r e e l y throughout t h e f l a t t e n e d p a r t .

II tube test specimens s h a l l be f l a t t e n e d wi th t h e weld a r e a loca ted i n t h e bend.

the f l a t t e n i n g test, t h e tube s h a l l be slowly f l a t t e n e d by one s t r o k e of t h e press .

with 4.4.2.1 an& t o meet requirements of 3.3 s h a l l be cause f o r r e j e c t i o n of t h e l o t from which the specimen was s e l e c t e d , s u b j e c t t o t h e provis ions o f t h e s e c t i o n on r e j e c t i o n and retests of FED-STD-151.

c 4.4.3 Hydros ta t ic pressure =. Each t u b e s h a l l be t e s t e d i n t h e condi t ion to be o f f e r e d f o r acceptance. Tube of s tandard dimensions s h a l l be subjec ted a t r o o m temperature t o an i n t e r n a l pressure not less than 150 percent o r g r e a t e r than 165 percent of t h e maximum workin pressure as s p e c i f i e d i n 1.2. The pressure t o be used f o r tube of nonstandard dimensjons ( s p e c i a l class) s h a l l be as s p e c i f i e d by t h e procuring a c t i v i t y (see 6.1).

t i v e tubes shall n o t be o f f e r e d f o r de l ivery .

each tube sa@@ m c t e d as s p e c i f i e d i n 4.2.2.1.

po l i shed and e tched i n accordance with ASTM E340.

r e j e c t e d , t o g e t h e r with t h e e n t i r e lo t it represents .

I 4.4.5 Magnetic rmeabi l i ty test. A specimen from one end of each t u b e sample s e l e c t e d as s e c i f i e d an 4 . 2 . 2 5 shall be t e s t e d i n accordance wi th ASTM A342. F a i l u r e of one or more specfmens t o met the requirement of 3.6 s h a l l b e cause f o r r e j e c t i o n of t h e l o t from which the E ecimen was s e l e c t e d , a u b j e c t t o t h e provis ions of t h e s e c t i o n on r e j e c t i o n and retests of &-STwi5i.

This 4-inch test specimen s h a l l be f l a t t e n e d so t h a t a gage set a t t h r e e Type

I n making

4.4.2.3 Acce tance criteria. F a i l u r e of one or more specimens t e s t e d kn accordance

Defec-c 4.4.4 Etch test. A specimen c o n s i s t i n g o f an annular r i n g s h a l l be c u t from an end of The specimen s h a l l be meta l lographica l ly

Any specimen found t o be welded s h a l l be

4.4.6 Weight. Each lot of tube as defined i n 4.2.1 s h a l l be weighed t o i n s u r e t h a t the tubes comply wi th the requirements s p e c i f i e d i n 3.8.1.

c 4.4.7 Laminations and a e Conformance t o t h e w a l l th ickness requirements of 3.8.2 s h a l l be determined by c=m&%ntial measurements on both ends of t h e tub& unless u l t r a s o n i c gaging is requi red by 3.4.3.4. Ul t rasonic gaging f o r th ickness and laminat ions s h a l l be c a r r i e d o u t c i rcumferent ia l ly a t 18-inch i n t e r v a l s or less along t h e e n t i r e length of the tube by t h e compression wave technique i n accordance wi th MIL-STD-271.

tubes as appl icable , t h a t do not meet t h e requirements o f 3.8.2 s h a l l be r e j e c t e d .

wi th t 4 I L - S T - H d e f e c t s i n excess of t h o s e permit ted by 3.4.2 are found i n class 50 and 200 tube, an a d d i t i o n a l s p o t s h a l l be radiographed on each side of the o r i g i n a l spot .

I f t h e s e l o c a t i o n s are acceptable , t h e o r i g i n a l a r e a s h a l l be repa i red and reradiographed for inspection. Excessive d e f e c t s i n class 700 and 1650 tube a h a l l be weld repa i red and reradiographed f o r inspec t ion without explor ing a d d i t i o n a l sites on e i t h e r s i d e of a d e f e c t i v e area.

4.4.9 Ul t rasonic i n s ec t ion . For tube having an o u t s i d e diameter of 5.563 inches or less, u l t r a s o n c M act on s h a l l be i n accordance wi th t h e appl icable s e c t i o n s of MIL-STD- 271 except as t p e k i f r e d i n 4.4.9.1 through 4.4.9.0. For tube having an o u t s i d e diameter l a r g e r than 5.563 inches, u l t r a s o n i c inspec t ion s h a l l be i n accordance wi th t h e appl icable s e c t i o n s of MIL-STD-271.

Each sample, or a l l

4.4.0 Radio r a h . Tube s p e c i f i e d i n 4.2.2.5 s h a l l b e radiographed i n accordance

+ I

# 4.4.9.1 Instruments. Instrument t o be used i n t h e inspec t ion system s h a l l have a minimum bandwidth of p lus or minus 10 percent (measured a t t h e 3 d e c i b e l s (a) down poin ts ) from t h e nominal 5 megahert? (MHz) opera t ing frequency. Instrument bandwidth may be v e r i f i e d by t h e manufacturer ' s c e r t i f i c a t i o n .

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4.4.9.2 Search u n i t s . Search u n i t s t o be used i n t h e i n s p e c t i o n system s h a l l provide Por l o n g i t u d i n a l d e f e c t inspec- an inspec t ion - n w 5 MHZ p l u s or minus 1 0 percent .

t i o n , a c y l i n d r i c a l l y focused t ransducer s h a l l be used. The a c t i v e element s h a l l n o t exceed 1 / 2 by 1 inches i n s i z e . I t s h a l l produce a sound beam having a width n o t g r e a t e r than 3/16 inch when maasured at a d i s t a n c e of 3 t o 5 inches i n water. The beam p r o f i l e s h a l l not deviate more than minus 2 dñ from t h e peak amplitude along t h e a x i s and be a t least l / l - inch vide at t h e 2 dñ down poin t . The beam p r o f i l e and width s h a l l be maintained wi th in the 3-t o 5-inch zone i n Mater as s h a m on f i g u r e 1.

of u l t r a s o n i c a l l y sound tube o r p ipe of t h e same type , w a l l th ickness , and o u t s i d e diameter as t h a t t o be t e s t e d as def ined i n MIL-STD-271. The s tandard s h a l l meet t h e f l a t n e s s re-quirement shown on f i g u r e 2 and shall have t w o l o n g i t u d i n a l notches. One l o n g i t u d i n a l notch s h a l l be on t h e i n s i d e surface and one on t h e o u t s i d e sur face . The notch dimensions s h a l l be w i t h i n t h e t o l e r a n c e s shown on f i g u r e 2 and may be machined or electro-discharge-machined.

The notches s h a l l have a depth of 5 percent of t h e minimum w a l l as l i s t e d i n table III or

0.005 inch, whichever is g r e a t e r .

from the coupl-

# 4.4.9.3 Reference s tandard. C a l i b r a t i o n re ference s tandard s h a l l be made from a length

# 4.4.9.4 Cou l a n t V i s i b l e suspended fore ign p a r t i c l e s ( s o l i d s or air) s h a l l be excluded

I Nearest u n i t in t h e laet right-hand p l a c e of f i g u r e s of t h e i p e c i f i e d l i m i t l

Nearest 1000 lb / in2 c ~ 4.4.9.5 C a l i b r a t i o n for inspec t ion .

# 4.4.9.5.1 Circumferent ia l . Scan u n t i l t h e notch i n d i c a t i o n on t h e i n s i d e diameter, shown as p o s i t i o n 1 on f i g u r e 5 is c l e a r l y resolved.

s h a l l be m v e d u n t i l t h e i n d i c a t i o n from t h i s notch reappears a long t h e h o r i z o n t a l trace, s h a m as p o s i t i o n 3 on f i g u r e 3.

produced at maximum amplitude, shown as p o s i t i o n 2 on f i g u r e 3. The d i s t a n c e between the f r o n t s u r f a c e s i g n a l and t h e lead ing edge o f t h e g a t e s h a l l be determined by t h e f r o n t s u r f a c e n o i s e l e v e l .

1 and 2 on f i g u r e 3 achieve t h e n e a r e s t amplitude match. E l e c t r o n i c balancing s h a l l n o t be used.

# 4.4.9.6 Recal ibrat ion. During acceptance t e s t i n g , any real inement of t h e search u n i t wi th r e s p e c t t o the tube, or any change i n search u n i t , couplant , inst rument s e t t i n g s , or scanning speed from t h a t used f o r c a l i b r a t i o n s h a l l r e q u i r e r e c a l i b r a t i o n .

the c a l i b r a t i o n s h a l l be rechecked a t least once p e r 8-hour s h i f t and a t t h e completion of t e s t i n g . I f a recheck i n d i c a t e s t h a t r e c a l i b r a t i o n is requi red , a l l items t e s t e d s i n c e t h e l as t instrument check s h a l l be reinspected.

# 4.4.9.7 T e i t i n (scannin 1 . The search u n i t p o s i t i o n with respect t o t h e tube axis s h a l l be m a i n t d i h c e n t of t h e nominal o u t s i d e diameter of t h e t u b e or 0.010 inch, whichever is greater.

percent inspection coverage.

notches s h a l l each be de tec ted above t h e alam level n o t less than two t i m e s during one t r a v e r s e of t h e notch length. This scanning s h a l l be done wi th t h e same couplant , search un i t alinement and instrument s e t t i n g s as were used during c a l i b r a t i o n .

# 4.4.9.8 Acce tance c r i t e r i a . Any p o r t i o n o f a tube which produces an i n d i c a t i o n equal t o or g r e a t e r &eject l e v e l s e s t a b l i s h e d dur ing c a l i b r a t i o n s h a l l n o t be o f f e r e d for

The r e f e r e n c e c a l i b r a t i o n s tandard

Scan u n t i l t h e notch i n d i c a t i o n f r o m t h e o u t s i d e diameter is

The tes t angle s h a l l be adjus ted so t h a t t h e s i g n a l s shown as pos i t ione

The alam or recorder s h a l l be set a t 50 percent of f u l l sc reen height .

I n a d d i t i o n , Proper r o t a t i o n and through 6peeds s h a l l be used t o i n s u r e 100 The h e l i x s h a l l be ad jus ted such t h a t t h e s tandard re ference de l ivery .

# 4.4.10 Nimierical limits. For purposes o f determining compliance wi th t h e s p e c i f i e d lidt. fox r e q u i r h e n t s o f e p r o p e r t i e s l i s t e d i n table X I V , an observed value or a c a l c u l a t e d value s h a l l be rounded-off as i n d i c a t e d i n accordance wi th t h e rounding-off method Of ASTM E29.

Chemical composition

T e n s i l e Yield s t r e n g t h

Elongation Nearest 1 percent I

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4.5 C e r t i f i c a t i o n of u a l i t conformance i n s ec t ion . A c e r t i f i c a t i o n of q u a l i t y con-formance in spec t ion s h a l l - b h í d s h e d w i t h e a c h a t e r i a l o f fa red f o r acceptance.

The c e r t i f i c a t i o n sha l l inc lude a c t u a l numerical va lues , where app l i cab le , of s p e c i f i e d chemical, mechanical, metal lographic , and nondes t ruc t ive tests. I t s h a l l also inc lude t h e r e s u l t s of i n i t i a l tests as w e l l as a l l retests of t h e material o f f e r e d f o r acceptance, t oge the r w i t h t h e reason retest was requi red , when acceptance of t h e l o t is based on any of t h e fol lowing provis ions of FED-STD-151:

I

(a) Replacement of test specimens.

(b) R e t e s t of add i t iona l specimens from t h e lot .

(c) Resubmittal of a r e j e c t e d l o t f o r test a f t e r rework or removal of nonconform-i n g material.

I 4.5.1 The i d e n t i f i c a t i o n of m e l t s , h e a t s or l o t i , and t h e gene ra l requirements f o r test specimens s h a l l be i n accordance wi th t h e genera l s e c t i o n of FED-STD-151. I n add i t ion , t h e con t r ac to r s h a l l r epor t t h e mel t ing source of t h e master m e l t i f t h e con t r ac to r is no t t h e melter of t h e master m e l t .

f i g u r e 4.

4.5.2 The minimum c e r t i f i c a t i o n d a t a requi red may be submit ted i n t h e format shown on t

4.6 Inspec t ion of r epa ra t ion for d e l i v e r . The packaging, packing, and marking s h a l l be inspec ted f o r compnaEce with s e c t i o n 5 of tyhis document.

5. PREPARATION FOR DELIVERY

(The p repa ra t ion f o r de l ive ry requirements s p e c i f i e d h e r e i n apply only f o r d i r e c t Government procurement.)

5.1 Packaging, packin , markins. Prepara t ion f o r de l ive ry s h a l l be i n accordance wi th t h e requirements of MIL-C-3993. Level C packaging, packing, and marking s h a l l apply unless l e v e l A packaging and l e v e l A or B packing a r e r equ i r ed and s p e c i f i e d (see 6.1).

I

Harking s h a l l be i n accordance with MIL-C-3993.

6. NOTES

I 6.1 Orderinq data. Procurement documents should spec i fy t h e following:

T i t l e , number, and d a t e of t h i s s p e c i f i c a t i o n .

Composition, temper, t ype , class, and grade (see 1.2).

Whether h y d r o s t a t i c t e s t i n g i s r equ i r ed f o r t ube s u b j e c t t o u l t r a s o n i c i n s p e r

Whether an a l t e r n a t e nondes t ruc t ive test method i s proposed (see 3.4.3).

Whether u l t r a s o n i c test i s requi red €or class 50 and 200 tube (see 3.4.3.1, When u l t r a s o n i c test of f l a t product is requi red (see 3.4.3.2).

Whether magnetic permeabi l i ty t e s t i n g is requ i r ed f o r a l l o y 706 tube (see 3.6).

Dimensions of s tandard tube required (see table III or I V and 3.7).

Dimensions of nonstandard tube and class requi red (see 3.8.1).

Length of tube o r schedule o f l eng ths requi red and whether e x a c t or m i l l

Whether tube markrng IS requi red (see 3.10).

Q u a l i t y assurance requirements (see 4.1.1).

Hydros ta t ic t es t preasure requi red (minimum and maximum) f o r special class

Level of packaging and packing requi red , i f o t h e r than as s p e c i f i e d (see 5.1).

Maximum gross weight of conta iner .

t i o n (see 3.4.1).

3.4.3.2, and 3.4.3.3).

l eng ths (see 3.8:5.1!.

tube (see 4.4.3).

6.2 annealed tube: however, tube o t h e r than f u l l y annealed may p resen t p r o b l e m i n bending to r a d i i less than 5 diameters and show excess ive w a l l t h inn ing a t bends.

drawn tube should not be ordered f o r a tock if f u l l y annealed tube i o ava i l ab le .

weight.

L ight drawn a l l o y 706 tube is less s u b j e c t t o damage i n handl ing than f u l l y

Accordingly, l i g h t

6.3 Tube should be purchased on a footage b a s i s (per foot of length) i n preference to

1 7

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t 6.4 Type I tube meeting the t e n s i l e s t r e n g t h requirements of t h i s s c i f i c a t i o n is normally a v a i l a b l e i n s i z e s up t o and inc luding 8-5/8 inches i n o u t s i d e dgrneter. For s i z e s which exceed t h i s range, a v a i l a b i l i t y is l i m i t e d t o sources w i t h a l a r g e s i z e tube c a p a b i l i t y .

6.5 The chemical and mechanical proper ty requirements of t h i s s p e c i f i c a t i o n are

6.6 Chan es from revious i ssue . The margins of t h i s s p e c i f i c a t i o n are marked w i t h to i n à & ~ c ~ ~ ~ a ~ o n s , modi f ica t ions , c o r r e c t i o n s , d e l e t i o n s ) from the previous issue were made. This was done a s a convenience only and t h e Government assumes no l i a b i l i t y whatsoever f o r any inaccurac ies i n these nota t ions . Bidders and c o n t r a c t o r s are caut ioned t o e v a l u a t e t h e requirements of t h i s document based on the e n t i r e contan t i r r e s p e c -t i v e of the marginal n o t a t i o n s and r e l a t i o n s h i p t o t h e l a s t previous i s s u e .

s i m i l a r to MCTM B466 and B467, copper a l l o y no. 715 and 706.

Preparing a c t i v i t y :

Navy - SH (Project 4710-N30 8)

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