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Alloy Steel Pipe

Alloy pipes have a hollow section 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 is lighter in weight when the bending and torsional strength is the same, alloy steel pipe is an economic section steel, widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycle racks and steel scaffolding used in building construction. The use of alloy steel pipe to manufacture ring parts, can improve material utilization, simplify the manufacturing process, save materials and processing hours, such as rolling bearing rings, jack sleeves, etc., has been widely used steel pipe manufacturing. Alloy steel pipe is also an indispensable material for all kinds of conventional weapons, gun barrels, etc. must be made of steel pipes. Alloy steel pipes can be divided into round tubes and special-shaped tubes according to different cross-sectional area shapes. Since the circular area is largest under the condition of equal circumference, more fluid can be transported with a round tube. In addition, the torus section is more uniform when subjected to internal or external radial pressure, so the vast majority of steel pipes are round tubes.

Main material:12Cr1MoV、P22(10CrMo910)T91、P91、P9、T9、WB36 、Cr5Mo(P5、STFA25、T5、)15CrMo(P11、P12、STFA22)、13CrMo44、Cr5Mo、15CrMo、25CrMo、30CrMo、40CrMo

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Alloy seamless steel pipe is a kind of seamless steel pipe, its performance is much higher than the general seamless steel pipe, because this kind of steel pipe contains more Cr, its high temperature resistance, low temperature resistance, corrosion resistance is not comparable to other seamless steel pipes, so alloy pipe in petroleum, chemical, electric power, boiler and other industries are widely used.

Alloy seamless steel pipe contains elements such as silicon, manganese, chromium, nickel, molybdenum, tungsten, vanadium, titanium, niobium, zirconium, cobalt, aluminum, copper, boron, rare earth, etc.

Execution standards:

DIN17175-79、JISG3467-88、JISG3458-88、GB5310-2008 、GB9948-2006、ASTMA335/A335m、ASTMA213/A213m

The production process:

Hot rolled (extruded seamless steel pipe): Round pipe billet → heated → perforated→ three-roll oblique rolling, continuous rolling or extrusion → de-sizing→ sizing (or reducing diameter) → cooling → billet pipe → straightening→ hydrostatic test (or flaw detection) → marking → storage.

Cold-drawn seamless steel pipe: round round pipe billet → heating→ perforation→ heading→ annealing→ pickling→ oiling (copper plating), →multi-pass cold-drawn (cold-rolled) →billet pipe→ heat treatment→ straightening→ hydrostatic test (flaw detection) → marking → storage

Alloy seamless steel pipe specification table
Material specification Material specification
12Cr1MovG 16-18*3 15CrMo 57-60-63.5*4-5-9
12Cr1MovG 28-32*3-5-6 15CrMo 89-114*6-8-10
12Cr1MovG 48*305-5-6-8 15CrMo 133*6-8-10-14
12Cr1MovG 51*3.5-5-6-8 15CrMo 159*8-10-12-16
12Cr1MovG 60*4-5-8-10 15CrMo 168*8-10-16-20
12Cr1MovG 63.5*4-5 15CrMo 219*14-16-20
12Cr1MovG 76*3.5-6-8-10 15CrMo 273*10-12-14-16-20
12Cr1MovG 89*4.5-6-8-10-12 15CrMo 325*10-12-14-25
12Cr1MovG 108*4.5-6-8-10-12 15CrMo 377*10-12-25
12Cr1MovG 114*6-8-10-12-14 15CrMo 377*24-45
12Cr1MovG 159*8-10-12-16 15CrMo 426*12-14-16-30
12Cr1MovG 194*8-10-16 10Crm910 33.4*9.1
12Cr1MovG 219*8-10-16-20-25 10Crm910 54*6.5
12Cr1MovG 245*10-12-20 10Crm910 57*5.6
12Cr1MovG 273*10-10-12 10Crm910 530*110
12Cr1MovG 325*10-12-14-25-30 T91 57-60*5.6
12Cr1MovG 377*10-16-30 T91 60*4-6-8
12Cr1MovG 426*10-16-25 T91 54-4-8-10
12Cr1MovG 480*48 T91 51*7
15CrMo 28*4-6 T91 42-5.5
15CrMo 38-42-45*3.5-5-6-8 12Cr2MoWVTiB 42*3.5-5
15CrMo 51*3.5-4-5-6-8 15Mn3 42*5-6
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