Alloy seamless steel tube is a kind of seamless steel pipe, its performance is much higher than the average seamless steel tubes, because this kind of steel tube containing Cr inside is more, its high temperature resistance, low temperature resistance, corrosion resistance is the performance of the seamless steel tube than the other, so the alloy pipe in petroleum, chemical industry, electric power, boiler, etc used more extensive.
Alloy seamless steel tube containing element is silicon, manganese, chromium, nickel, molybdenum, tungsten, vanadium, titanium, niobium, zirconium, cobalt, aluminum, copper, boron, rare earth, etc.
The production process
Hot rolled (extrusion seamless steel tube) : the circular tube billet - heat - punch - three-roll skew rolling, rolling, or pressing - to take off the tube and sizing (or reducing) - cooling - the tube billet - straightening - hydrostatic test (or inspection) to tags, put in storage.
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.
Structure with seamless steel pipe: mainly used in the general structure and the mechanical structure.It represents material (brand) : carbon steel, 45 # steel 20;Alloy steel Q345, 20 crmo 20 cr, cr, 40, 30-35 crmo, 42 crmo, etc.
Transmission fluid with seamless steel tube: it is mainly used for conveying fluid pipeline engineering and large equipment.On behalf of the material (brand) of 20, Q345, etc.
Low medium pressure boiler seamless steel pipe: mainly used in industrial boiler and boiler of low intermediate pressure fluid pipe life.On behalf of the material for 10, 20 steel.
High pressure boiler seamless steel pipe: mainly used in power plant and nuclear power plant boiler high temperature resistant, high voltage transmission fluid collection box and the pipeline.On behalf of the material of 20 g, 12 cr1movg, 15 crmog, etc.
Ship with carbon steel and carbon manganese steel seamless steel pipe: mainly used in Marine boiler and overheating for grade I, II pressure tube, etc.On behalf of the material for 360, 410, 460, steel grade, etc.
Seamless steel pipe used in high pressure chemical fertilizer equipment: mainly used in fertilizer equipment in high temperature and high pressure liquid pipeline.On behalf of the material for 20, 16 mn, 12 crmo, 12 cr2mo, etc.
Seamless steel tube used in oil cracking: mainly used in oil refineries of boiler, heat exchangers and pipe conveying fluid.Its representative material of 20, 12 crmo, 1 cr5mo, 1 cr19ni11nb, etc.
Cylinders with seamless steel pipe: mainly used in producing all kinds of gas, hydraulic cylinders.It represents material for 37 mn, 34 mn2v, 35 crmo, etc.
Hydraulic prop with hot rolled seamless steel pipe: mainly used in production of coal mine hydraulic support and cylinder, column, and other hydraulic cylinder, column.Its representative material of 20, 45, 27 simn, etc.
Diesel engine with high-pressure seamless steel pipe: mainly used in diesel injection system of high pressure oil pipe.The steel pipe for cold drawn pipe commonly, its representative material to 20 a.
Cold drawn or cold rolled precision seamless steel pipe: mainly used in the mechanical structure, carbon pressure equipment used for high precision size and good surface finish steel pipe.It represents material 20 and 45 steel, etc.
The material of alloy pipe
12 cr1mov, P22 (10 crmo910) T91, P91, P9, T9, WB36 and Cr5Mo (P5, STFA25, T5,) 15 crmo (P11, P12, STFA22), 13 crmo44, Cr5Mo, 15 crmo crmo crmo, 25, 30, 40 crmo.
The national standards
, JISG3467-88, JISG3458 DIN17175-79-88, GB5310-2008, GB9948-2006, ASTMA335 / A335m, ASTMA213 / A213m.