Seamless Alloy Steel Pipe is a kind of seamless steel tube, its performance is much higher than the general seamless steel tube, because this steel tube contains Cr more, its resistance to high temperature, low temperature, corrosion resistance performance is no match for other seamless steel tube, so the alloy tube in the petroleum, chemical, electric power, boiler and other industries are widely used.
OD: 38.1-228.6mm, thick: 1.5mm-20mm
Section shape: round
Quality: ISO 9001:2000
Material: A179, A179M
Standard: ASTM, GB, DIN, JIS, API, EN
Technique: hot-rolled, cold-rolled
Application: heat exchaner pipe
Seamless Alloy Steel Pipe contains elements such as silicon, manganese, chromium, nickel, molybdenum, tungsten, vanadium, titanium, niobium, zirconium, cobalt, aluminum, copper, boron, rare earth and so on.
Seamless Steel tubes have long strips of Steel with hollow sections and no seams at the edges.Steel pipe with hollow section, a large number of fluid transport pipelines, such as oil, natural gas, gas, water and some solid materials pipeline.Alloy seamless steel tube and round steel and other solid steel, bending and torsional strength at the same weight, is an economic section of steel, widely used in the manufacture of structural parts and mechanical parts, such as oil transport, stair handrail, bicycle frame and construction of steel scaffolding.Using alloy seamless steel tube to manufacture ring parts can improve the material utilization rate, simplify the manufacturing process, save materials and processing time, such as rolling bearing ring, jack sleeve, etc., has been widely used to manufacture steel tube.Alloy seamless steel tube or all kinds of conventional weapons indispensable materials, gun barrel, barrel, etc.In addition, the ring section under internal or external radial pressure, the force is more uniform, therefore, most of the alloy seamless steel tube is circular.
The production process
Hot rolling (extrusion of seamless steel tube): round tube billet → heating → perforation → three-roll cross rolling, continuous rolling or extrusion → tube stripping → sizing (or reducing)→ cooling → billet tube → straightening → hydraulic test (or flaw detection)→ marking → warehousing.
Seamless steel pipe cold drawing (rolling) : round billet - heat - punch to heading, annealing and pickling to apply oil (copper), multi-channel time cold drawing (cold) and billet tube - heat treatment - straightening to hydrostatic test (NDT) - > tag, put in storage.
Seamless steel tube for structure: mainly used for general structure and mechanical structure.Its representative material (brand): carbon steel 20, 45 steel;Alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35crmo, 42CrMo, etc.
Seamless steel tube for conveying fluid: mainly used for conveying fluid pipeline in engineering and large equipment.The representative material (brand name) is 20, Q345, etc.
Seamless steel tube for low and medium pressure boiler: it is mainly used for conveying low and medium pressure fluid in industrial boilers and domestic boilers.The representative material is no.10 and no.20 steel.
Seamless steel tube for high pressure boiler: it is mainly used for high temperature and high pressure conveying fluid collecting box and pipeline of power station and nuclear power station boiler.The material is 20G, 12Cr1MoVG, 15CrMoG, etc.
Carbon steel and carbon manganese steel seamless steel tube for ship: mainly used for ship boiler and superheater I, II pressure resistant tube, etc.Representative materials are 360, 410, 460 steel grade, etc.
Seamless steel tube for high pressure fertilizer equipment: mainly used for conveying high temperature and high pressure fluid pipeline on fertilizer equipment.The representative materials are 20, 16Mn, 12CrMo, 12Cr2Mo, etc.
Seamless steel pipe for petroleum cracking: mainly used for boilers, heat exchangers and fluid pipelines in petroleum smelters.Its representative materials are 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb, etc.
Seamless steel tube for gas cylinders: mainly used for making various gas and hydraulic cylinders.Its representative materials are 37Mn, 34Mn2V, 35CrMo, etc.
Hot rolled seamless steel tube for hydraulic prop: mainly used for making hydraulic support and cylinder, column in coal mine, as well as other hydraulic cylinders and columns.Its representative materials are 20, 45, 27SiMn and so on.
High pressure seamless steel pipe for diesel engine: mainly used for high pressure tubing of diesel engine injection system.Its steel tube is generally cold-drawn tube, and its representative material is 20A.
Cold drawing or cold rolling precision seamless steel tube: mainly used for mechanical structure, carbon pressure equipment, requiring high dimensional accuracy, good surface finish.Its representative material 20, 45 steel and so on.
12Cr1MoV, P22(10CrMo910)T91, P91, P9, T9, WB36, Cr5Mo(P5, STFA25, T5, P11, P12, STFA22), 13CrMo44, Cr5Mo, 15CrMo, 25CrMo, 30CrMo, 40CrMo.
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