We offer API 5L X56 steel plate/pipes as large diameter pipes: 1.Chemical composition: Si :≤0.015 C:≤0.22 Mn:≤1.4 　S :≤0.015 P :≤0.025 Ti:≤0.04 Nb+V+Ti:≤ 0.15 2. Mechanical properties: Tensile Strength σb(MPa) : 490-758 Yield Strength σ0.2(MPa): 386-544 3.Application : API 5L X56 steel plate/pipes is one mainly of Steel for large diameter pipes. API 5L X56 is mainly for the manufacture of buried pipelines for transporting natural gas can succumb to severe degradation due to corrosion by the soil through. The types of corrosion of steel that can be produced are often general corrosion and pitting.And the followings are the chemical composition and the mechanical properties of API X56 steel. If you have any problem, please be free to contact us: Tel:0086-371-86151827 Fax:0086-371-86011881 nancy@bebonchina.com