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 6135-01-357-0621
NSN 5925-00-433-1966
NSN 5930-00-111-1369
NSN 5960-01-558-7787
NSN 5975-01-338-2948
NSN 5960-01-356-1693
NSN 6220-00-529-8415
NSN 6130-00-577-3475
NSN 6150-01-164-7700
NSN 5975-01-313-9027
NSN 2925-01-134-9175
NSN 6610-01-140-5921