Hebei Shengtian seamless steel pipe with high quality carbon structural steel

　　Generally, seamless steel pipes are hot-rolled or cold-rolled from high-quality carbon-bonded steel 16Mn, 5MnV or low-alloy structural steel 40Cr, 30CrMnSi, 45Mn2, 40MnB, etc. Seamless steel pipes made of low carbon steel such as 10 and 20 are mainly used for fluid conveying pipes. Seamless steel pipes made of medium carbon steel, such as 45, 40Cr, are used to manufacture mechanical parts, such as stress parts of automobiles and tractors. Generally, seamless steel pipe should be used to ensure strength and flattening test. Hot-rolled steel pipes are delivered in hot-rolled or heat-treated state; cold-rolled steel pipes are delivered in hot-rolled or heat-treated state. Seamless steel pipes for low and medium pressure boilers: They are used to manufacture various kinds of low and medium pressure boilers, superheated steam pipes, boiling pipes, water wall pipes and superheated steam pipes for locomotive boilers, large smoke pipes, small smoke pipes and arch brick pipes, etc.

　　ASTM A53 12 Inch St37 Carbon Seamless Steel Pipe are hot-rolled or cold-rolled with high quality carbon structural steels.Seamless steel pipes is mainly made of No. 10 and No. 20 steel. In addition to ensuring chemical composition and mechanical properties, hydraulic test, edge rolling, flattening and other tests should be done. Hot rolling is delivered as hot rolling and cold rolling (dialing) as heat treatment.