4130 Alloy Tubing is commonly referred to as Chromoly, which contains chromium and molybdenum as alloying elements. Chromoly is superior to mild carbon steel based on a strength to weight ratio, making it widely used in applications that require less weight but similar strength. Such as roll cages for race cars, high performance bicycle frames, and fuselages for aircrafts. 4130 tubing meets ASTM A519 Cold Drawn MIL-T-6736B Condition N/ AMS-T-6736B Stocked Size Range: 0.250â?? OD â?? 6.0â?? OD; 0.035â?? wall â?? 0.625â?? wall thickness Stocked Lengths 17â??-24â?? random lengths All common off road sizes available Benefits of Round 4130/4140 Alloy Seamless Mechanical Tubing Superior tensile strength to mild carbon steel High strength to weight ratio Heat treatable to a broad range of strength, machinability, and hardness.