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Low alloy ST52 seamless steel pipe for steel structure
Low alloy steel pipe is: low alloy high strength structural steel: carbon content is 0.1% – 0.25%, adding main alloy elements such as manganese, silicon, vanadium, niobium and titanium; Its total alloy content is less than 3%. According to the strength, it is divided into four levels: 300, 350, 400 and 450MPa.
There are mainly q295, Q345, Q390, Q420 and Q460 “Q” is the Chinese Pinyin capital prefix of the yielding “Qu”, and the subsequent number is the minimum yield point of the brand（ σ s) The subsequent symbols are divided into a, B, C and d according to the content of impurity elements (sulfur and phosphorus) in the steel from high to low and with the change of carbon and manganese elements. Among them, Grade A and B steels are usually called 16Mn
Chemical composition of 16Mn low alloy steel pipe:
C：0.12~0.20； Mn:1.20~1.60； Si:0.20~0.55； Tensile strength: 470 ~ 660 n / mm2; Yield strength: 275 ~ 345 n / mm2; Elongation: 21%. The specific value shall be based on the thickness or diameter of steel. The thickness or diameter of steel corresponding to the above data is 16 ~ 100mm
Application of 16Mn low alloy steel pipe:
The special steel for bridge is “16Mnq”, the special steel for automobile girder is “16MnL”, and the special steel for pressure vessel is “16MnR”.
16Mn low alloy steel pipe standard:
Seamless steel pipe for chemical fertilizer (gb8179-1999)
16Mn low alloy steel pipe specification: 32mm — 426mm hot expanded non-standard steel pipe -
A53 A106GR. B a283d carbon steel seamless steel pipe manufacturer price concessions
Carbon steel seamless steel pipe is a kind of long steel with. Steel 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, steel pipe has the same flexural and torsional strength and light weight. It is an economic section steel. It is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and steel scaffold used in construction.
Manufacturing ring parts with steel pipes can improve the utilization rate of materials, simplify the manufacturing process, and save materials and processing hours, such as rolling bearing rings, Jack sleeves, etc. at present, steel pipes have been widely used for manufacturing.
Steel pipe is also an indispensable material for all kinds of conventional weapons. Gun barrel and barrel should be made of steel pipe. 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, the vast majority of steel pipes are round pipes.
Manufacturing ring parts with steel pipes can improve the utilization rate of materials, simplify the manufacturing process, and save materials and processing hours, such as rolling bearing rings, Jack sleeves, etc. at present, steel pipes have been widely used for manufacturing. -
A335 P12 A369 FP12 13CRMO44 A213 T12 alloy steel pipe
13CrMo44 alloy tube is used for the heating surface tube of low and medium pressure boiler (working pressure is generally not more than 5.88Mpa, working temperature is below 450℃); for high pressure boiler (working pressure is generally above 9.8Mpa, working temperature is 450℃～650℃ Between) heating surface pipes, economizers, superheaters, reheaters, petrochemical industry pipes, etc.
P12 alloy tube The alloy tube can be roughly divided into three types: carburized, quenched and tempered and nitrided steel. It has better comprehensive mechanical properties than high-quality carbon structural steel tubes. P12 alloy tubes are mainly used for heating surface tubes of low and medium pressure boilers; heating surface tubes for high pressure boilers, economizers, superheaters, reheaters, petrochemical industry tubes, etc. -
Medium and low pressure steel pipe made in China
High-pressure boiler tube is a kind of boiler tube, which belongs to the category of seamless steel tube. The manufacturing method is the same as that of seamless pipes, but there are strict requirements on the steel grades used in the manufacture of steel pipes. High-pressure boiler tubes are often in high-temperature and high-pressure conditions when used, and the tubes will be oxidized and corroded under the action of high-temperature flue gas and water vapor. The steel pipe is required to have high durable strength, high oxidation and corrosion resistance, and good organizational stability. High-pressure boiler tubes are mainly used to manufacture superheater tubes, reheater tubes, air ducts, main steam tubes, etc. of high-pressure and ultra-high-pressure boilers.
Specification of high pressure boiler tube: 8-1240×1-200mm
High-pressure boiler tube manufacturing process: hot rolling, cold drawing, thermal expansion
Executive standard:
GB5310-2008—–Chinese Standard
ASME SA106——-American Boiler and Pressure Vessel Code
ASME SA210-American Boiler and Pressure Vessel Code
ASME SA213-American Boiler and Pressure Vessel Code
DIN17175-Federal German Industrial Standard
use:
Heating surface tubes, economizers, superheaters, reheaters, petrochemical industry tubes, etc. of high-pressure boilers (the working pressure is generally above 9.8Mpa, and the working temperature is between 450°C and 650°C). -
S45C steel pipe is of high quality and low price
Seamless steel tube is a long strip of steel with hollow section and no joint around it. Seamless steel pipe has hollow section and can be used as pipeline for conveying fluid, such as pipeline for conveying oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, seamless steel pipe has the same flexural and torsional strength and light weight. It is an economic section steel.
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High pressure boiler tube manufacturer sales
The main importing countries of boiler tubes are Japan and Germany. The specifications of frequently imported products are 15914.2mm; 2734.0mm; 219.110.0mm; 41975mm; 406.460mm, etc. The minimum specification is 31.84.5mm, and the length is generally 5 ~ 8m.
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SCR440 5140 40X 42C4 steel pipe is customized by the manufacturer
Seamless steel pipe for structure GB / t8162-2018 is mainly used for general structure and machining. Its representative material (brand): carbon steel 20#, 45 steel; Alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35crmo, 42CrMo, etc.
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Seamless steel pipe direct sales of various materials
Seamless steel pipe is perforated by the whole round steel, and the steel pipe without weld on the surface is called seamless steel pipe. According to the production method, seamless steel pipe can be divided into hot-rolled seamless steel pipe, cold-rolled seamless steel pipe, cold drawn seamless steel pipe, extruded seamless steel pipe, pipe jacking, etc.
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Seamless steel pipes are in stock
Steel pipe is not only used for conveying fluid and powdery solids, exchanging heat energy, manufacturing mechanical parts and containers, but also an economic steel. Using steel pipe to make building structure grid, pillar and mechanical support can reduce weight, save metal by 20 ~ 40%, and realize industrialized and mechanized construction.
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