... of Origin: ChinaApplication: Seamless steel tubes for equipment, pipelines, vessels,pipe fittingsand mechanical StructuresGrade: 10,20,35,45,Q345,15CrMo,12Cr1MoV ... . Other steel grade can be provided according to customer required.Dimensions, Mechanical properties, Chemical composition: Refers to GB5310-1999 or please ... contact us, your inquiry will be highly appreciated andtreated. Seamless pipe