ASTM A29 4140 Hollow Bar | High Strength Alloy Steel Seamless Tube Supplier
ASTM A29 4140 Hollow Bar is a chromium-molybdenum alloy steel known for its high tensile strength, toughness, and excellent wear resistance. Widely used in hydraulic cylinders, shafts, rollers, and heavy engineering components. It offers superior machinability and heat treatment response. Available in various sizes and custom specifications.