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Tianjin Wanlei Steel Pipe Co.,Ltd
TEL: 86-22-65815991
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JIS G3475 Carbon Steel Tubes For Building Structure
JIS G3475 carbon steel tube is mainly used for building structure, such as offshore platforms, bridges, gymnasiums and airport waiting halls. JIS G3475 standard covers three grades, STKN400W, STKN400B, STKN490B.
Description
JIS G3475 Carbon Steel Tubes for Building Structure
JIS G3475 carbon steel tube is mainly used for building structure. The dimension range is from 114.3mm to 1000.0mm in outside diameter. These tubes shall be classified into three grades, STKN400W, STKN400B, STKN490B.
Manufacturing process: seamless, electric resistance welding, butt welding, straight seam automatic arc welding
Manufacturing type: hot rolled, hot formed, warm finished, cold rolled, cold formed, cold drawn
Chemical composition %
Grade | C | Si | Mn | P | S | N |
SYKN400W | ≤0.25 | - | - | ≤0.030 | ≤0.030 | ≤0.006 |
SYKN400B | ≤0.25 | ≤0.35 | ≤1.40 | ≤0.030 | ≤0.015 | ≤0.006 |
SYKN490B | ≤0.22 | ≤0.55 | ≤1.60 | ≤0.030 | ≤0.015 | ≤0.006 |
Carbon equivalent
The carbon equivalent shall be calculated according to the following formula,
carbon equivalent %=C+Mn/6+Si/24+Ni/40+Cr/5+Mo/4+V/14
SYKN400W | ≤0.36% |
SYKN400B | |
SYKN490B | ≤0.44% |
Application of steel tubes for construction
Steel tubes have a positive effect on building construction. Steel tubes for structure must be enough strong and steady, no deforming and shaking to satisfy with the construction request. Recently, the structure steel tube takes the advantage of its own superiority to widely use in all structural fields. Engineering projects, such as offshore platforms, bridges, dykes and dams, towers masts. Civil buildings, such as houses, aquariums, gymnasiums and airport waiting halls.
Our production condition
1. Scale. We own workshop and warehouse covered an area of ten thousand square meters.
2. Workers. There are hundreds of professional staff with the training and experience in our factory.
3. Equipment. All equipment including welding, measuring and testing tools used in the production process will be calibrated and tested in accordance with relevant regulations of ISO9001 so that the production line can be smoothly operated.
Our advantage
1. Our products have ever been exported to all over the world for important construction project.
2. We hold a sufficient inventory of carbon steel pipe products in a variety of material, sizes, shapes to meet your different requirements.
3. As the distributor and trader in the local market, we have long term cooperation and business relations with many world-famous manufacturers. Due to their strong support, not only is the price of our products cheaper than other suppliers, but also the quality stands the competition well.
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