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 5990-01-291-8453
NSN 5905-01-454-5163
NSN 6145-01-499-9085
NSN 6320-01-233-5798
NSN 5975-01-027-2157
NSN 5985-00-626-5533
NSN 5985-00-135-4762
NSN 5915-01-403-2599
NSN 6220-01-218-4894
NSN 6105-01-442-5644
NSN 5990-01-287-9447
NSN 5999-01-471-5108