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 4140-00-431-0156
NSN 6645-01-246-7129
NSN 6105-01-315-4012
NSN 5960-01-181-2143
NSN 6105-00-785-7769
NSN 5960-01-442-7950
NSN 5998-01-153-2689
NSN 6620-01-015-2470
NSN 6105-00-500-1796
NSN 5945-01-272-9579
NSN 5996-01-212-3066
NSN 5985-00-248-4277