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 6130-01-206-4587
NSN 6645-01-223-7274
NSN 6105-01-003-9162
NSN 5920-01-206-3977
NSN 6150-01-073-6851
NSN 5998-01-167-4582
NSN 5990-00-140-4559
NSN 5915-01-317-4080
NSN 6320-01-493-4472
NSN 5975-01-269-5261
NSN 5855-01-225-5855
NSN 6110-01-303-7557