Executive standard: 1.ASTMA106grb/A178c/A210A,JISG3454/3455/3461/3456,DIN7175/1626/1629; 2.JIS G345,ASTM A210-C,DI. ... Seamless steel tubes for equipment, pipelines, vessels,pipe fittingsand mechanical StructuresGrade: 10,20,35,45,Q345,15CrMo,12Cr1MoV,A53A, ... grade can be provided according to customer required.Dimensions, Mechanical properties, Chemical composition: Refers to GB5310-1999 or please ...