Steel Tube Network News: Steel Reinforcement Engineering Knowledge Selecting Seamless Steel Tube Seamless steel tubes are made by punching steel ingots or solid billets and then hot rolled, cold rolled or cold drawn. The specifications of the seamless steel pipe are expressed in terms of outer diameter*thickness mm. Seamless steel tube is divided into hot-rolled and cold-rolled (dial) seamless steel tubes. Hot-rolled seamless steel tubes are divided into general steel tubes, low- and medium-pressure boiler steel tubes, high-pressure boiler tubes, alloy steel tubes, stainless steel tubes, petroleum cracking tubes, geological steel tubes, and other steel tubes. 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 to 6mm, wall thickness can be to 0.25mm, thin-walled pipe outer diameter to 5mm wall thickness is less than 0.25mm, cold Rolling has higher dimensional accuracy than hot rolling.
Generally used seamless steel pipe is 10,20,30,35,45 and other high-quality carbon steel 16Mn, 5MnV such as low-alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB such as hot-rolled or cold rolled steel into. 10,20 and other seamless tubes made of low carbon steel are mainly used for fluid transportation pipelines. 45, 40Cr and other medium carbon steel seamless tubes are used to make mechanical parts, such as parts for cars 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 by heat as a heat-treated state.
Above seamless pipe knowledge source
