... Q235, Q275, Q345ASTM,GB,JIS,DIN0.4-1.9mm, 1000/1250mmWidely used in construction, furniture Automotive manufacturing, electric products, vehicles ... ,347L,409L,410,420,430,601,800,904L, etcST37-2, ASTM A36,S235JR,S355JR,SS4001.8-12mm,1250/1500mmWidely ... 40mmMainly used in chemical equipment,fertilizer equipment and pipelines under high pressure or high tempretureOil casing pipeAPI J55, API K55, API L80, ...