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 6620-01-185-0811
NSN 5920-00-106-5751
NSN 5975-01-467-1497
NSN 5930-00-514-2095
NSN 6130-00-979-5923
NSN 5920-00-006-1919
NSN 5996-00-276-5480
NSN 5960-01-251-5995
NSN 6105-00-403-3305
NSN 5965-00-729-6835
NSN 5960-01-552-0862
NSN 5950-01-652-8426