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Hot-rolled seamless steel pipe knowledge and cold-rolled (dial) seamless steel pipe knowledge Hot-rolled seamless steel pipe is divided into general steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, geological steel pipe and other Steel pipe and so on.
Cold-rolled (dial) seamless steel pipes include general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, and other steel pipes, as well as carbon thin-walled steel pipes and alloy thin-walled steel pipes. Stainless steel pipe, special-shaped steel pipe. Hot-rolled seamless pipe outer diameter is generally greater than 32mm, wall thickness 2.5-75mm, cold-rolled seamless steel pipe diameter can be up to 6mm, wall thickness can be to 0.25mm, thin-walled pipe outer diameter can be 5mm, wall thickness is less than 0.25mm, Cold rolling has higher dimensional accuracy than hot rolling.
General seamless steel pipe: It is used 10#, 20#, 30#, 35#, 45# high quality carbon steel 16Mn, 5MnV low alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB alloy steel hot rolling or cold Rolled into. 10,20 and other seamless tubes made of low carbon steel are mainly used for fluid transportation pipelines. The seamless pipes made of medium-carbon steel such as 45# and 40Cr are used to make mechanical parts such as parts for vehicles and tractors. Generally used seamless steel pipe to ensure strength and flattening test. The hot-rolled steel pipe is delivered in a hot-rolled state or a heat-treated state; the cold-rolled steel is delivered in a heat-treated state.
Cold-rolled (dial) seamless steel pipes include general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, and other steel pipes, as well as carbon thin-walled steel pipes and alloy thin-walled steel pipes. Stainless steel pipe, special-shaped steel pipe. Hot-rolled seamless pipe outer diameter is generally greater than 32mm, wall thickness 2.5-75mm, cold-rolled seamless steel pipe diameter can be up to 6mm, wall thickness can be to 0.25mm, thin-walled pipe outer diameter can be 5mm, wall thickness is less than 0.25mm, Cold rolling has higher dimensional accuracy than hot rolling.
General seamless steel pipe: It is used 10#, 20#, 30#, 35#, 45# high quality carbon steel 16Mn, 5MnV low alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB alloy steel hot rolling or cold Rolled into. 10,20 and other seamless tubes made of low carbon steel are mainly used for fluid transportation pipelines. The seamless pipes made of medium-carbon steel such as 45# and 40Cr are used to make mechanical parts such as parts for vehicles and tractors. Generally used seamless steel pipe to ensure strength and flattening test. The hot-rolled steel pipe is delivered in a hot-rolled state or a heat-treated state; the cold-rolled steel is delivered in a heat-treated state.
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