4140 Alloy Tubing is a low alloy steel, with the addition of chromium, molybdenum and manganese as alloying elements, combined with heat treatment, gives 4140 alloy the advantage of hardness, ductility, and strength. Commonly used in applications for Oil and Gas, Agricultural equipment, and heavy machinery components. 4140 Alloy tubing Meets ASTM A519 standards Stocked Size Range: 3â?? OD â?? 15â?? OD; 0.375â?? wall â?? 2.0â?? wall thickness Available in Annealed, Quench and Tempered, and Normalized Cut to length service available