mechanical properties of 15crmo alloy pipe
tensile strength MPa yield point MPa elongation after breaking (%) area shrinkage (%)
chemical composition of 15crmo alloy pipe
(mass fraction) (%)
C Si Mn Cr Mo Ni B V
15crmo.12 ~. .7 .8 ~ 1.1 .4 ~ .55 —— [(outside diameter-wall thickness) * wall thickness ]*.2486=kg/ meter (weight per meter) Seamless steel pipes are divided into the following categories due to their different uses: GB/T8162-28 (seamless steel pipes for structures). Mainly used in general structures and mechanical structures. Its representative material (brand): carbon steel No.2 and No.45; Alloy steels Q345, 2Cr, 4Cr, 2CrMo, 3-35CrMo, 42CrMo, etc. GB/T8163-28 (Seamless Steel Pipe for Fluid Transportation). It is mainly used for conveying fluid pipelines in engineering and large equipment. Representative materials (brands) are 2, Q345, etc. GB387-28 (Seamless Steel Pipe for Low and Medium Pressure Boilers). Mainly used in industrial boilers and domestic boilers to transport low and medium pressure fluids. The representative materials are 1 and 2 steel. GB531-28 (Seamless Steel Pipe for High Pressure Boiler). It is mainly used for high-temperature and high-pressure conveying fluid headers and pipelines on boilers of power stations and nuclear power plants. Representative materials are 2G, 12Cr1MoVG, 15CrMoG, etc. GB5312-1999 (Seamless Carbon Steel and Carbon Manganese Steel Pipe for Ships). Mainly used for class I and II pressure tubes for ship boilers and superheaters. The representative materials are steel grades 36, 41 and 46. GB6479-2 (Seamless Steel Pipe for High Pressure Fertilizer Equipment). It is mainly used for conveying high-temperature and high-pressure fluids on chemical fertilizer equipment. The representative materials are 2, 16Mn, 12CrMo, 12Cr2Mo, etc. GB9948-26 (Seamless Steel Pipe for Petroleum Cracking). It is mainly used for boilers, heat exchangers and fluid pipelines in petroleum smelters. Its representative materials are 2, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb and so on. GB18248-2 (seamless steel pipe for gas cylinders). Mainly used for making all kinds of gas and hydraulic cylinders. Its representative materials are 37Mn, 34Mn2V, 35CrMo, etc. GB/T17396-1998 (Hot rolled seamless steel pipe for hydraulic prop). Mainly used for making coal mine hydraulic supports, cylinders and columns, as well as other hydraulic cylinders and columns. Its representative materials are 2, 45, 27SiMn, etc. GB393-1986 (high pressure seamless steel pipe for diesel engine). It is mainly used for high-pressure tubing of diesel engine injection system. Its steel pipe is generally cold-drawn pipe, and its representative material is 2A. GB/T3639-1983 (cold-drawn or cold-rolled precision seamless steel pipe). It is mainly used for steel pipes with high dimensional accuracy and good surface finish for mechanical structures and carbon pressing equipment. Its representative materials are 2, 45 steel, etc. GB/T394-1986 (Cold-drawn seamless steel pipe with special shape). It is mainly used to make various structural parts and components, and its materials are high-quality carbon structural steel and low-alloy structural steel. GB/T8713-1988 (precision inner diameter seamless steel pipe for hydraulic and pneumatic cylinders). It is mainly used to make cold-drawn or cold-rolled seamless steel tubes with precise inner diameter for hydraulic and pneumatic cylinders. Its representative materials are 2, 45 steel, etc. GB13296-1991 (Stainless Steel Seamless Steel Pipe for Boiler and Heat Exchanger). Mainly used in boilers, superheaters, heat exchangers, condensers and catalytic tubes in chemical enterprises. Steel pipe with high temperature resistance, high pressure resistance and corrosion resistance. Its representative materials are Cr18Ni9, 1Cr18Ni9Ti, Cr18Ni12Mo2Ti and so on. GB/T14975-1994 (Seamless Stainless Steel Pipe for Structure). It is mainly used for general structures (hotel and restaurant decoration) and steel pipes with atmospheric and acid corrosion resistance and certain strength for mechanical structures of chemical enterprises. Its representative materials are -3Cr13, Cr18Ni9, 1Cr18Ni9Ti, Cr18Ni12Mo2Ti, etc. GB/T14976-1994 (Seamless Stainless Steel Pipe for Fluid Transportation). Mainly used for pipelines conveying corrosive media. The representative materials are Cr13, Cr18Ni9, 1Cr18Ni9Ti, Cr17Ni12Mo2, Cr18Ni12Mo2Ti, etc. YB/T535-1993 (Seamless Steel Tube for Automobile Axle Bushing). It is mainly used to make high-quality carbon structural steel and alloy structural steel hot-rolled seamless steel pipes for automobile axle sleeves and drive axle housing shafts. Its representative materials are 45, 45Mn2, 4Cr, 2CrNi3A, etc. 15CrMo alloy pipe can be recycled, which conforms to the national strategy of environmental protection, energy saving and resource saving. The national policy encourages the expansion of the application fields of 15CrMo alloy pipe. At present, the consumption of 15CrMo alloy pipes in China accounts for only half of the total steel products in developed countries, and the expansion of the use field of 15CrMo alloy pipes provides a broader space for the development of the industry. According to the research of 15CrMo alloy pipe branch of China Special Steel Association, the demand of excellent talent for high-pressure 15CrMo alloy pipe in China will increase by 1-12% annually in the future.