Seamless steel tube for structural purpose is mainly divided as carbon structural steel tube and high-strength low-alloy structural steel tube; it is mainly used for mechanical structures and, seamless steel pipe for general engineering purposes. The carbon structural steel tube is mainly used for buildings, bridges, ship building and general transmission pipe of fluid, and it is usually used without heat treatment. High strength low alloy structural steel tube is widely used in boilers, bridges, ships, vehicles and major in building construction due to its high strength and mechanical purpose

Main Steel Grade

20、45、20Mn、Q345、20Mn2、27Mn2、30Mn2、20CrMo、35CrMo、42CrMo、E355、E470。

Executive Standard

GB/T8162-2008 "Seamless steel tube for structural purpose"

EN 10216-1: 2004 "Seamless steel tubes for pressure purpose-technical delivery conditions"