... machinary furniture,automobile,industry instrument,agriculture,etc.Hot Rolled CoilQ195,Q235,Q345ASTM,GB,DIN834.5-5-10-12-14-16-18 ... in general and mechanical structure Alloy Steel PipeDin2391 17 Cr3, ST52, A335P11,P5,P910,P22, ST37, STK400GB5310-2008, ASTM A335/ ... -508mmUsed in oil & gas fieldsWelded Steel Pipe10#,20#,45#,Q195,Q215,Q235,Q345,etcGB,ASTM20-426mm,0.5-10mmMainly used in petroluem,natrual ...