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 7035-01-263-5463
NSN 5905-00-686-4555
NSN 6650-01-399-8552
NSN 6645-01-069-1326
NSN 5930-01-423-8554
NSN 6610-01-606-8788
NSN 4140-01-634-0330
NSN 6240-01-067-6457
NSN 5998-01-322-8541
NSN 5920-01-100-3018
NSN 6150-00-583-9878
NSN 5905-01-262-0389