4140 is a widely used medium carbon steel containing chromium and molybdenum, it commonly known as "chromoly". A general purpose alloy, offering the right combination of strength, toughness and hardness with good machinability.

Material: Alloy Steel
Shape: Round Rod
Alloy: 4140
Temper: Annealed
Diameter: 0.937 (15/16 inch)
Finish: Cold Finished
Specifications: ASTM A108, UNS G41400
Tolerances: Diameter: (+/-0.004) | Length: -0/+0.999)