Steel, astm a331, 4140, 4150, 8645, or steel qq-s-637, 1117; investment casting; mil-s-22141, ic 4140, ic 8640, tensile test is not appicable, casting per mil-c-6021, class 2, grade b; brazing material is brazing alloy, qq-b-650, bcu-1; harden and temper to rockwell a73-76.5; for 1117, carburize lg. At 1575-1600 degrees f. To case depth of 0.005-0.008, oil quench, temper 30 min. To file hardness; manganese phosphate or zinc phosphate, mil-p-16232, class 1, type m or z; brazed joint will withstand an axial load of 1000 lbs. Without evidence of failure.
NSN 5985-01-591-8010
NSN 6130-01-230-3210
NSN 5975-00-257-2793
NSN 6620-00-140-8644
NSN 5905-01-523-2330
NSN 7035-01-455-7277
NSN 4140-01-089-0465
NSN 5935-01-250-3957
NSN 6685-01-071-5547
NSN 6650-00-283-0978
NSN 4140-01-203-5128
NSN 5835-01-647-6426