Description
Alloy steel pipe is mainly used for high-pressure and high-temperature pipelines and equipment such as power plant, nuclear power, high-pressure boiler, high-temperature superheater and reheater. It is made of high-quality carbon steel, alloy structural steel and stainless heat-resistant steel through hot rolling (extrusion, expansion) or cold rolling (drawing). The biggest advantage of alloy steel pipe is that it can be recycled 100%, which is in line with the national strategy of environmental protection, energy conservation and resource conservation. The national policy encourages the expansion of the application field of high-pressure alloy pipe. At present, the consumption of alloy tubes in China accounts for only half of the total steel in developed countries. The expansion of the application field of alloy tubes provides a broader space for the development of the industry. According to the research of the expert group of alloy pipe branch of China Special Steel Association, the demand for high-pressure alloy pipe length in China will increase by 10-12% annually in the future. Alloy pipe is defined as steel pipe according to the production material (i.e. material). As the name suggests, it is a pipe made of alloy; Seamless pipe is defined according to the production process of steel pipe (seamless seam). What is different from seamless pipe is seamless pipe, including straight seam welded pipe and spiral pipe.The materials of alloy pipes are roughly as follows
16-50Mn 27SiMn 40Cr 12-42CrMo 16Mn 12Cr1MoV T91 27SiMn 30CrMo 15CrMo 20GIntroduction to alloy steel pipe
Alloy pipes have hollow sections and are widely used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, alloy steel pipe has lighter weight when its bending and torsional strength is the same. Alloy steel pipe is an economic section steel, which is widely used to manufacture structural parts and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and steel scaffold used in construction. Making ring parts with alloy steel pipe can improve the material utilization rate, simplify the manufacturing process, save materials and processing hours, such as rolling bearing ring, jack sleeve, etc. at present, steel pipe has been widely used for manufacturing. Alloy steel pipe is also an indispensable material for all kinds of conventional weapons. Gun barrel and barrel should be made of steel pipe. Alloy steel pipe can be divided into round pipe and special-shaped pipe according to different cross-sectional area and shape. Because the circular area is the largest under the condition of equal circumference, more fluid can be transported by circular pipe. In addition, when the ring section is subjected to internal or external radial pressure, the force is more uniform. Therefore, most steel pipes are round pipes.Cr9Mo 10CrMo910 15Mo3 15CrMoV 35CrMoV 45CrMo 15CrMoG 12CrMoV 45Cr 50Cr 45crnimo et al.