... , ST35,ST37,ST37.4,ST45,ST52,ST52.4,4) ASTM,DIN,EN,JIS Descriptionseamless steel pipes,seamless steel pipes,cold-drawn or ... ,etcStandardsDIN2391,DIN2445,DIN1629,DIN1630,DIN73000,DIN2445,EN10305,JIS G3445,ASTM A106,ASTM A179,ASTM A519,etc.Delievery ConditionNBK(+N), GBK(+A), BK(+C ...