Alloy steel pipe are divided into seamless pipes for structural purposes and high-pressure heat-resistant alloy steel pipe. Mainly different from the production standards and industry of alloy steel pipe, annealing and tempering of alloy pipes can change their mechanical properties. Achieve the required processing conditions. Its performance is higher than that of ordinary seamless steel pipes in terms of variable utilization value, and the alloy pipe contains more Cr in its chemical composition, with high temperature resistance, low temperature resistance, and corrosion resistance.
The materials of alloy pipes generally include: 16-50Mn, 27SiMn, 40Cr, 12-42CrMo, 16Mn, 12Cr1MoV, T91 27SiMn 30CrMo 15CrMo 20G Cr9Mo 10CrMo910 15Mo3 15CrMoV 35CrMoV 45CrMo, 15CrMoG, 12CrMoV, 45Cr, 50Cr, 45CrNiMo, etc.
Materials and grades of high-pressure alloy steel pipe: 15CrMoG, 12Cr2MoG, 12Cr1MoVG, 12Cr2MoWVTiB, 10Cr9Mo1VNb, SA210A1, SA210C, SA213 T11, SA213 T12, SA213 T22, SA213 T23, SA213 T91, SA213 T92, ST45.8/III, 15Mo3, 13CrMo44, 10CrMo910, etc
The execution standards for alloy pipes generally include the following:
Chinese National Standards
GB/T8162-2008 Seamless Steel Pipe for Structural Purposes, mainly used for general structures and mechanical structures. Its representative material (grade): carbon steel 20, 45 steel; Alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.
GB/T8163-2008 Seamless Steel Pipe for Fluid Transportation, mainly used for conveying fluid pipelines on engineering and large equipment. The representative materials (grades) are grade 20 steel, Q345, etc.
GB3087-2008 medium and low pressure seamless steel pipes are mainly used for pipelines conveying low and medium pressure fluids in industrial and domestic boilers. The representative materials are grade 10 and 20 steel.
GB6479-2000 Seamless steel pipes for high-pressure fertilizer equipment are mainly used for transporting high-temperature and high-pressure fluid pipelines on fertilizer equipment. The representative materials are 20, 16Mn, 12CrMo, 12Cr2Mo, etc.
GB9948-2006 Seamless steel pipes for petroleum cracking are mainly used in boilers, heat exchangers, and fluid pipelines in petroleum refineries. Its representative materials are 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb, etc.