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 5945-00-046-4593
NSN 5835-01-629-2044
NSN 4140-01-385-0889
NSN 5999-00-497-2140
NSN 7035-00-215-3272
NSN 6685-00-153-0266
NSN 5960-00-368-4084
NSN 5990-00-076-9839
NSN 5985-01-566-8567
NSN 6610-01-413-2312
NSN 5915-01-398-9831
NSN 6135-01-119-0720