Seamless steel raj rau cov hom phiaj kev tsim kho, Seamless steel raj rau cov khoom siv kho tshuab hauvGB/8162-2008Txuj. Cov khoom muaj xws li cov pa roj carbon zoo thiab cov hlau tsis tshua muaj hlau, xws li 10,20,35,45 thiab Q345, Q460, Q490,42CrMo, 35CrMo.