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 5990-01-091-3567
NSN 5945-01-305-7593
NSN 5975-01-308-6543
NSN 5925-00-184-5973
NSN 5905-01-561-5936
NSN 5905-01-228-5485
NSN 6220-00-446-7626
NSN 6320-01-056-1164
NSN 5965-00-920-0455
NSN 6220-01-106-7845
NSN 6135-00-134-6648
NSN 5999-00-239-2181