MIL-S-83135, MILITARY SPECIFICATION: STEEL BARS, REFORGING STOCK, AND MECHANICAL TUBING, 4340M, HIGH QUALITY (30-APR-1968) [S/S by SAE-AMS6409 and SAE-AMS6417]

MIL-S-83135, MILITARY SPECIFICATION: STEEL BARS, REFORGING STOCK, AND MECHANICAL TUBING, 4340M, HIGH QUALITY (30-APR-1968) [S/S by SAE-AMS6409 and SAE-AMS6417]., This specification covers vacuum melted low alloy steel bars, reforging stock, and mechanical tubing intended for use at tensile strength levels of 270,000 pounds per square inch (psi) and above.