AISI 4140 Tubes are high-strength alloy steel tubes made from a chromium-molybdenum (Cr-Mo) low alloy steel grade. Known for its excellent mechanical properties, AISI 4140 offers high tensile strength, fatigue resistance, and toughness, making it ideal for applications requiring durability under dynamic and high-stress conditions. These tubes are typically supplied in normalized, quenched, and tempered conditions to enhance their hardness and mechanical strength.
With a typical chemical composition of 0.38–0.43% Carbon, 0.75–1.00% Manganese, 0.80–1.10% Chromium, and 0.15–0.25% Molybdenum, AISI 4140 Tubing provides superior hardenability and wear resistance. It also maintains good machinability and responds well to heat treatment processes such as annealing, tempering, and nitriding. These tubes offer tensile strengths ranging from 850 to 1000 MPa and are often used in precision applications that require high load-bearing capability.
