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 6610-01-542-2276
NSN 5950-00-721-1825
NSN 6620-00-932-6508
NSN 5905-00-578-7507
NSN 6620-00-123-1779
NSN 5915-01-424-3186
NSN 6685-01-140-0487
NSN 5960-00-215-5884
NSN 6110-01-154-5102
NSN 5935-01-398-9899
NSN 5998-01-363-9935
NSN 6240-01-071-2127