A.02 USACE Drawing E-1730-17.pdf

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Torque (34) □16 x:50 cap screws to 255 ft.lb •

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APRIL '93 4 IMP!"LLER E.ACH

WEIGHED 3,GOO LB+ \00

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1361?.E AND Ll M ITED KIGI-\TS \'lOTE PAT1ERN NllMBl;;R WA.S EP'3t.

GENERAL NOTES: Unless otherwise specified

Do not scale drawing1.

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All dimensions shown to finished size in inches.

Tolerances - Decimals as shown, Fractions + or - 1/64"

Material: High chrome white iron with following properties:

Tensile Strength Elongation Brinell Hardness

Fracture toughness

Microstructure

110,000 psi to 150,000 psi 0.5% to 1.5% 490 to 580

29 KSI{iii, to 37.4 KSI{iii, per ASTM E-399-83 KlC M7C3 type with rounded edges in a matrix of at least 50 % 1nartensite. The remainder of the matrix will be austenite or ferrite with some secondary carbides.

5. Patterns - Govern1nent furnishcd,1"'t..,)t. A,·,'\Veight 628 lbs. including crate. Crate• size 4' x 4' x 3.5' high. Patterns originally made for casting steel. Patterns n1ust be 1nodified for white iron.

Patterns to be 1nodified as req uircil to allow for shrink and swell to achieve finished dimensions shown. Prior to returning pattern, clean and varnish per standard foundry practices. Return pattern in its original crate.

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:' 6. Finish . Unless indicated otherwise, surfaces shall be as-cast and shot-blasted.

7. Mating Surfac-,�s - After machining, shall clean-up 70% complete. Surface sand defects are acceptable under the following conditions:

a. Bumps shall be ground smooth.

b. Pockets (1/16" deep or less) shall be faired-in by grinding

c. Pockets not over 1/16" deep and not over 2" in diaineter or 2" in length.

; 8. Balance: The contractor shall re1nove material by grinding in area noted. Balance shall be within 2 lb at the 0. D. of the impeller.

J1 Inspection:

a. All castings shall be identified by casting raised letters and numbers in the area shown, they shall not be higher than the adjacent surfaces. The identification shall be in 2

· · . inch high letters, and shall consist of the last 7 n1,1mbers and letters of the contract nuinber.

b. A test coupon, also marked as above, shall be poured from the same heat for each casting for later heat treatment and testing.

c. Heat treatment of the casting is the responsibility of the vendor.

87--- A laEl1s a:na±ysis sHaU be pro1ritleel far each pour Hl"eived. T+li� analyds sflaU m.licat.i l-0 wllieh eastiHg it apflli@£. Tiu: re�11!t& of tllese ttH:a-l:' ses sball be fumisheel t6 tile 80'.'eram@flt lRop@ctor. Any crac!(s visible with dye penetrant shall be rejected .

e. Inspection of the finished castings shall be by dye penetrant inspection. The Contractor shall check the casting for din1ensional accuracy and faults such as sand inclusions, cracks or ga:s pockets. Any distortion that will prevent the casting from being n1achincd to drawing·,size will be �e for rejection.

f. The test coupon shall be attached to and heat-treated with each casting. This coupon shall be tested by an independent or the Contractor's in-house testing laboratory to confirm that the material properties meet the requirements; A written copy of this report shall be furnished to the Government Inspector on or before the final inspection.

g. It is the intent of the Government to inspect the finish machined castings only one tin1e. However, the government reserves the right to spot-check the progress of the work at any tilne during the progress of the work. The final inspection by the Government shall be after all machining is complete. For this inspection the parts shall be clean and shot-or sand-

. blasted to near-white (except machined surfaces which shall be protected from blasting). The Inspector may make this final inspection prior to shipment of these components to the Govern1nent.

A This drawing is derived from Dredge. ?echnology Corporation L"",_drawings (as listed above} which were furnished under Contract

DACW6l·"/9•C·Ol59 to Sun Ship, Inc., P. 0. Kl7600ff/D'l'C Job S026F/IHC ORD. 70.010 except for changes noted above.

Contents are subject to limited: rights per F.A.R. 52.227-14, etc.

The U. S. Government prohibits any use or disclosure other than maintenance and repair of U. S. Anny Corps of Engineers, Dredge

ESSAYONS.

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DREDGE ESSAYONS

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OWG NO.

E -1130-\7

SCALE I --=-S°"" SHEET OF

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