... , Q345ASTM,GB,JIS,DIN0.4-1.9mm, 1000/1250mmWidely used in construction, furniture Automotive manufacturing, electric products, vehicles, ... ASTM A36,S235JR,S355JR,SS4001.8-12mm,1250/1500mmWidely used in light industry,decoration,machinary furniture,automobile,industry instrument ... gas fieldsWelded Steel Pipe10#,20#,45#,Q195,Q215,Q235,Q345,etcGB,ASTM20-426mm,0.5-10mmMainly used in petroluem,natrual gas ...