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 6150-01-639-8152
NSN 5990-01-121-1175
NSN 6105-00-419-9726
NSN 5945-01-331-0591
NSN 4140-00-966-5762
NSN 5975-01-602-9402
NSN 5855-01-180-5369
NSN 6320-01-364-1840
NSN 5935-01-349-7326
NSN 5855-00-237-4088
NSN 6105-01-578-6551
NSN 5930-01-226-9309