Heavy Wall Erw Seamless Round Steel Tube Astm A513 Carbon And Alloy

Product Description

Heavy Wall Erw Seamless Steel Round Tube Astm A513 Carbon and Alloy

①The two digits at the beginning of the steel number indicate the carbon content of the steel, expressed in ten thousandths of the average carbon content, such as 40Cr.
② The main alloying elements in steel, except for individual microalloying elements, are generally expressed in percent. When the average alloy content is less than 1.5%, only the element symbol is generally indicated in the steel number, but the content is not indicated. However, in special cases, if it is easy to cause confusion, the number "1" can also be marked after the element symbol, such as the steel number. "12CrMoV" and "12Cr1MoV", the former has a chromium content of 0.4-0.6%, the latter is 0.9-1.2%, and the rest of the components are all the same. When the average content of alloying elements is ≥1.5%, ≥2.5%, ≥3.5%..., the content should be indicated after the element symbol, which can be expressed as 2, 3, 4...etc. For example 18Cr2Ni4WA.
③Alloying elements such as vanadium V, titanium Ti, aluminum AL, boron B, and rare earth RE in the steel are all microalloying elements, and although the content is very low, they should still be marked in the steel grade. For example, in 20MnVB steel. Vanadium is 0.07-0.12% and boron is 0.001-0.005%.
④High-quality high-quality steel should add "A" at the end of the steel number to distinguish it from general high-quality steel.
⑤ For special purpose alloy structural steel, the steel number is crowned (or suffixed) with a symbol representing the purpose of the steel. For example, the special 30CrMnSi steel for riveting screws, the steel number is expressed as ML30CrMnSi.
Alloy pipes and seamless pipes have both relationships and differences, and should not be confused.

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Production process
Hot rolling (extruded seamless steel pipe): pipe billet → heating → perforation → three-roll oblique rolling, continuous rolling or extrusion → pipe → diameter (or diameter reduction) cooling pipe straightening → hydraulic test (or flaw detection) marking → storage.
Cold drawing (rolling) seamless steel pipe: round tube billet → heating → perforation → head → annealing → pickling → oiling (copper plating), multi-pass cold drawing (cold rolling)→ billet tube heat treatment, straightening → water pressure test (flaw detection) marking → storage.

Classification
Seamless steel pipe for structure: mainly used in general structure and mechanical structure. Its representative material (brand): carbon steel 20,45 steel; alloy steel Q345,20Cr,40Cr,20CrMo,30-35CrMo,42CrMo.

Seamless steel pipe for conveying fluid: mainly used for conveying fluid pipes on engineering and large equipment. representative material (brand number) is 20, Q345, etc.
Seamless steel pipe for low medium pressure boiler: mainly used in industrial boiler and domestic boiler to transport low medium pressure fluid pipeline. Representative material is 10,20 steel.
Seamless steel pipe for high pressure boiler: It is mainly used for high temperature and high pressure conveying fluid header and pipeline on power station and nuclear power plant boiler. Representative material is 20 G,12Cr1MoVG,15CrMoG, etc.
Carbon steel and carbon manganese steel seamless steel pipe for ship: mainly used for ship boiler and superheater I,II grade pressure resistant pipe. Representative material is 360,410,460 steel grade etc.
Seamless steel pipe for high pressure chemical fertilizer equipment: mainly used for conveying high temperature and high pressure fluid pipeline on chemical fertilizer equipment. representative material is 20,16 Mn,12CrMo,12Cr2Mo etc.
Seamless steel pipe for petroleum cracking: boiler, heat exchanger and its conveying fluid pipeline mainly used in petroleum smelter. and its representative material is 20,12 CrMo,1Cr5Mo,1Cr19Ni11Nb, etc.

Alloy tubes are roughly made of
A213: T2, T5, T9, T11, T12, T22, T91, T92
A335: P1, P2, P5, P9, P11, P12, P21, P22, P91, P9
DIN17175: 15Mo3, 13CrMo44, 10CrMo910, 12CrMo195

The name of steel is the name of each specific steel product a common language for people to understand steel. China's rigid sign representation method generally uses the Chinese phonetic alphabet, chemical elements ​ symbols and Arabic numerals to express the following we specifically introduce the alloy steel material elements and symbols meaning:

1. high quality steel should be added "A"," at the end of the steel number to distinguish it from general high quality steel.
2. A special purpose alloy structural steel with a steel symbol (or suffix) representing the purpose of the steel. Such as riveting screw special 30 CrMnSi steel, steel number expressed as ML30CrMnSi.
3. For professional low alloy high strength steel, it should be marked at the end of the steel number. Such as 16 Mn steel, the special type of steel for bridge is "16 Mnq", special type of steel for automobil

Introductio

China Hebei Hong Cheng pipe fitting company is a professional enterprise that integrates pipe production, selling and exports.The company was founded in 1992. It covers an area of 0.1 million square meters.

There are 520 employees,3 of them are senior engineers,12 of them engineers and 150 of them professional technical workers.The annual production capacity is more than 20,000 tons, and the pipe turnover is more than 50,000 tons.

The company has advance production equipment, complete detection equipment and strong technology power. The leading products are steel pipe fitting accessories(elbows, bends, tees, cross tees, reducers, capping heads, flanges, hangers, socket components) series products.

The company is equipped with more than 20000 tons of all kinds of special steel tubes. The materials includes SA106B,20G, Q345,12Cr1MoVG,15CrMoG,1Cr5Mo,1Cr9Mo,10CrMo910,A335P5/P9/P11/P12/P22/P91/P92 and WB36. Steel pipe producing areas are mainly Tianjin big seamless, Shanghai Baogang, Chengdu Steel Vanadium, Yangzhou Chengde, Hualing Hengsteel, Baotou steel and Yangzhou Longchuan. And it has become a "authorized dealer", Electric power, metallurgy, city gas, heat pipe network, shipbuilding and other pipeline engineering.The company is keeping to its ideal of holding up to the quality brands for overtaking markets and to win customers by honesty and trust. Our products are selling across the globe in areas like Southeast Asia, the Middle East, North America and South America.

The reason why you Choose us

· ISO System

· TUV and BV Audited company .

· Industry experience over 50 years.

· Management Systems-Internal Software

· Finished Product Inventory-More Than 50000 Tons.

· Raw Material inventory -Over 80000 Mertic Tons.

· Shipment of goods -More than 50 countries worldwide.

· We have the most convenient transport and prompt delivery.

· We offer competitive price with best service .

· We have high technical production line with top quality products.

· We have win high reputation based on best quality products.

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