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 5998-01-053-5498
NSN 7035-01-338-5930
NSN 6105-01-560-7802
NSN 6620-00-003-2020
NSN 6145-01-160-7658
NSN 5905-00-126-3112
NSN 6145-01-377-5130
NSN 6650-01-596-6842
NSN 5935-01-218-0839
NSN 5960-00-115-2199
NSN 6610-00-886-3652
NSN 6130-00-959-5800