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 4140-00-849-0403
NSN 5950-01-392-0524
NSN 5855-00-560-0110
NSN 5935-00-498-0086
NSN 6130-00-885-1425
NSN 2925-01-462-1620
NSN 5998-01-205-8550
NSN 6645-01-525-7493
NSN 6620-00-472-5146
NSN 6135-01-508-6083
NSN 6135-00-932-3136
NSN 5920-00-521-8331