... St52 seamless carbon steel pipe 6"SCH40 DIN1629 St37.0,St44.0,St52.0 DIN17175 St35.8,St45.8 EN10208 Gr ... St52 seamless carbon steel pipe 6"SCH40 DIN1629 St37.0,St44.0,St52.0 DIN17175 St35.8,St45.8 EN10208 Gr ... ,St52 ASTM A209 Gr. T1,T1a,T1bDIN1629 Gr. St37.0,St44.0,St52.0JIS G3441 Gr.SCM415TK,SCM418TK,SCM420TKSCM430TK,SCM435TK,SCM440TK ...