We offer API 5L X65 steel plate/pipes as large diameter pipes: 1.Equivalent grades: DIN 17172 StE 445.7TM , EN10208-2 L450MB 2.Chemical composition(%): Si :≤0.55 C:0.04-0.16 Mn:1-1.6 　S :≤0.035 P :≤0.0.35 3. Mechanical properties: Tensile Strength σb(MPa) :560-710 Yield Strength σ0.2(MPa): ≥ 440 Permissible yield point ratio: ≤ 0.85 4. Application : X65 steel plate/pipes is one mainly of Steel for large diameter pipes. API-X65 steel pipes/plate is a higher strength, tough, weldable steel for applications in the oil and gas industry.X65 Flange Steel meets fully the mechanical property requirements of the API 5L X65 line pipe specifications whilst maintaining a high degree of toughness and weldability. If you have any problem, please be free to contact us: Tel:0086-371-86151827 Fax:0086-371-86011881 nancy@bebonchina.com