Seamless steel tubes for structural purposes, Seamless steel tubes for mechanical structures in GB/8162-2008 Standard. material include High-quality carbon steel and low alloy steel,such as 10,20,3...

Seamless steel tubes, Carbon steel pipe and alloy mechanical tubes ,mainly for mechanical in ASTM A519-2006 Standard,alloy mechanical tubes mainly include 1018,1026,8620,4130,4140 etc.

Seamless Steel Pipes For General Purpose Steam, Water, Gas And Air Lines In ASTM A53/A53M-2012 Standard.