We are offering american standard carbon steel grade: a3 6 specifications: thick t: 10-40 width w: 1800-2600 length l: 600 0-12700 standard: astm a36-05 the scope of products: a ductility, toughness, bending, welding performance, mainly exported to the u.s. For construction machinery, construction machinery, agricultural machinery and other industries and the general structure stampings and welded pipe, etc. Chemical composition c: 0.25, si 0.40, mn: 0.80-1.20, p 0.04, s: 0.05, cu 0.20 (when copper steel is specified). Mechanical properties yield strength: 250. Tensile strength :400-550. Elongation: 20. American standard carbon steel a3 6