MAX-EL 3 1/2 is a chromium-molybdenum free-cutting-alloy machinery steel, particularly adapted for service applications where substantial strength, toughness and hardness are required. See also MAXEL 3 1/2, Alloy Digest SA-262, March 1971. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on heat treating, machining, and joining. Filing Code: SA-45. Producer or source: Crucible Steel Company of America.