Factory supplied Metallurgical Steel 40cr Alloy Steel Pipe - Quality assurance of thick wall steel pipe made in China – Weichuan

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.

16-50Mn

27SiMn

40Cr

12-42CrMo

16Mn

12Cr1MoV

T91

27SiMn

30CrMo

15CrMo

20G

Cr9Mo

10CrMo910

15Mo3

15CrMoV

35CrMoV

45CrMo

15CrMoG

12CrMoV

45Cr

50Cr

45crnimo et al.

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.