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Description: Structural steel tubes are hot rolled seamless steel tubes and welded steel tubes. Seamless steel tubes for structure are divided into hot rolled and cold drawn types according to GB/T8162-2008.
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Lead Time:
Quantity(Metric Tons) | 1 - 10 | 10 - 50 | >50 |
Est. Time(days) | 5 | 10 | Negotiable |
Structural steel tubes are hot rolled seamless steel tubes and welded steel tubes. Seamless steel tubes for structure are divided into hot rolled and cold drawn types according to GB/T8162-2008. The outer diameter of hot-rolled steel pipe is 32-630mm, and the wall thickness is 2.5-75mm. The outer diameter of cold-drawn steel tube is 5-200mm, and the wall thickness is 2.5-12mm. Welded steel pipe is made of steel plate or strip after crimping forming. Straight welded steel tubes shall have an outside diameter of 5-508mm and a wall thickness of 0.5-12.7mm, and shall comply with the provisions of GB/T3793-2008. The welded steel pipe used for low-pressure fluid transportation is also called general welded pipe, commonly known as black pipe. The specifications are expressed in millimeters of nominal caliber, which shall comply with the provisions of GB/T3091-2008.
Main grades of the Structural Steel Pipe
Standard |
Grade |
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ASTM A53 |
GR.A |
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ASTM A106 |
GR.A |
GR.C |
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GB/T 8162 |
10# |
35# |
Q345A |
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20Cr |
20Mn2 |
45Mn2 |
40CrB |
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Q345E |
20CrMo |
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27SiMn |
A345C |
15CrMo |
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ASTM A519 |
1035 |
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DIN1629 |
St37.0 |
St44.0 |
St55 |
St52.0 |
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DIN17175 |
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EN10297 |
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JIS G3441 |
SCM 420TK |
SCM440TK |
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JIS G3445 |
STKM13A |
STKM19A |
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Seamless steel tubes are mainly used for general structure and mechanical processing.
We are a leading private steel company manufacturer. Our company has passed ISO9001 certifica-tion SGS certification and CE certification. Our company covers an area of 100,000 square meters,a con-struction area of 40,000 square meters, We speclize in steel plates for many years. steel plates have versatile applications in different industries. Its durable property makes it ideal for various manufacturing parts. Apart from carbon steel plate, there are vessel steel plate, shipbuilding or construction steel plate, structural steel plate, wear resistant steel plates, stainless steel plate, seamless steel pipes, Structure Steel Pipe, Boiler Steel Pipe, Tubing and Casing, Line Pipe, Coating pipe and etc.
Supplying the best quality goods to the world is our mission, to fulfill this mission, we formed a professional inspection team and an elite sales team. Till now, We have served for more than 100 countries. and established our own Machining processing center in order to meet customer's diverse requirements.
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