27simn seamless steel tubes, ie 27SiMn seamless steel tubes, are one of the materials for seamless steel tubes. The carbon content is between 0.24 and 0.32%. The simn single row is because of the five elements (carbon C, silicon Si and manganese). In Mn, phosphorus P, and sulfur S, the content of silicomanganese is about 1.10 to 1.40%. 27simn seamless pipe is suitable for power plant, boiler plant, chemical industry, car, ship accessories.
27simn seamless steel theory weight formula seamless steel tube per meter weight W=0.02466*S(DS)
Symbol Meaning: D = Outer diameter S = Wall thickness calculation example: For a seamless steel pipe with an outside diameter of 60mm and a wall thickness of 4mm, calculate the weight per m.
Weight per m=0.02466*4*(60-4)=5.52Kg
27siMn seamless steel pipe mechanical properties 27siMn seamless steel pipe mechanical properties [2]
Tensile strength σb (MPa): ≥980
Yield strength σs (MPa): ≥ 835
Elongation δ5/(%): ≥12
Section shrinkage ψ/(%): ≥40
Shock absorption work (shock value) (Aku2/J): ≥39
The price of seamless steel tubes is about 500-800 yuan/ton higher than that of straight seam welded tubes, and the price of seamless steel tubes is 800-1200 yuan/ton higher than that of seamless steel tubes.Seamless steel pipe production process|The seamless steel pipe is mainly achieved through tension reduction, and the tension reducing process is a continuous rolling process in which the hollow base metal does not have a mandrel. On the premise of guaranteeing the quality of the welding of the mother tube, the tension reducing process of the welded pipe is to heat the whole of the welded pipe to 950 degrees Celsius or more, and then to a variety of outer diameters and walls by a tension reducer (a total of 24 passes of the stretch reducer). The thick finished tube, the hot rolled steel tube produced by this process and the ordinary high-frequency welded pipe are essentially different. After heating in the heating furnace, the metallographic structure and mechanical properties of the weld and the parent metal can be completely consistent. The secondary tension reducer rolling and automatic control make the pipe’s dimensional accuracy (especially the pipe roundness and wall thickness accuracy) better than the similar seamless pipe. Fluid tubes and boiler tubes produced in developed countries in the world have adopted a large number of welded tube seamless processes. With the development of society, the domestic hot-rolled welded tubes have gradually replaced the seamless tubes.
Seamless steel pipe is a kind of long section steel with hollow section and no seam around. Steel has a hollow section, a large number of pipes used to transport fluids, such as the delivery of oil, natural gas, gas, water and some solid materials such as pipes. Seamless pipe is divided into hot-rolled tubes, cold-rolled tubes, cold drawn tubes, extruded tubes, pipe jacking. Seamless steel pipe for fluid transmission is used to transport water, oil, gas and other fluids generally seamless steel pipe. The low and medium pressure boiler seamless steel pipe is used in the manufacture of various structures of low and medium pressure boiler superheated steam pipes, boiling water pipes and superheated steam locomotive boiler tube, smoke pipe, small pipe and arch brick pipe with high-quality carbon structure Steel hot-rolled and cold-drawn seamless steel pipe. The difference between seamless steel tubes for fluid and seamless steel tubes for low and medium pressure boilers: Differences between GB / T8163-1999 and seamless steel tubes for fluid seamless steel tubes and low- and medium-pressure boilers Seamless steel tubes are a kind of seamless steel tube with a hollow section without surrounding Long strip of steel. Steel has a hollow section, a large number of pipes used to transport fluids, such as the delivery of oil, natural gas, gas, water and some solid materials such as pipes. Seamless pipe is divided into hot-rolled tubes, cold-rolled tubes, cold drawn tubes, extruded tubes, pipe jacking. Seamless steel pipe for fluid transmission is used to transport water, oil, gas and other fluids generally seamless steel pipe. The low and medium pressure boiler seamless steel pipe is used in the manufacture of various structures of low and medium pressure boiler superheated steam pipes, boiling water pipes and superheated steam locomotive boiler tube, smoke pipe, small pipe and arch brick pipe with high-quality carbon structure Steel hot-rolled and cold-drawn seamless steel pipe.
Post time: Feb-06-2023