... 16-31245*10-30273* 9-12 Productsseamless steel pipe, low alloy steel pipe, carbon steel pipeTechnicshot-rolledStandardGB/T8162,8163,17396,API Spec ... B, A315-B, A106-B, A210-C, A333-1,6, 27SiMn, 42CrMo4, 41Cr4,x42, x52, x60, St42, St45, St52( ... 45#, Q345B, 27SiMn,40Cr, 35CrMo and 42CrMo)Markingnon-removal stencil marking with standard, specifcation and steel grade. schedule 40 steel pipe for construction ...