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 6685-00-169-1654
NSN 6110-00-943-9479
NSN 2925-00-111-4097
NSN 6240-00-946-7858
NSN 6110-01-091-5348
NSN 5990-01-650-9034
NSN 6150-01-507-9454
NSN 5996-01-363-3117
NSN 2925-00-233-5644
NSN 6620-00-770-9794
NSN 6105-00-952-5031
NSN 5950-01-107-1769