TORICH INTERNATIONAL LIMITED
TORICH INTERNATIONAL LIMITED The Steel Tube Maker
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The GB/T 12770 standard specifies the requirements for welded stainless steel tubes used in mechanical structures. These tubes are manufactured from various stainless steel grades, each offering unique properties suitable for different applications.
The specification outlines the dimensions, tolerances, and mechanical properties of the welded stainless steel tubes. The tubes are typically produced in various diameters and wall thicknesses to meet specific engineering requirements.
| Steel Grade | C (%) | Cr (%) | Ni (%) | Mo (%) | Mn (%) | Si (%) | P (%) | S (%) |
|---|---|---|---|---|---|---|---|---|
| S30210 | 0.08 | 17.0-19.0 | 8.0-10.0 | - | 2.0 max | 1.0 max | 0.045 max | 0.03 max |
| S30408 | 0.08 | 18.0-20.0 | 8.0-10.5 | - | 2.0 max | 1.0 max | 0.045 max | 0.03 max |
| S30403 | 0.03 | 18.0-20.0 | 8.0-10.5 | - | 2.0 max | 1.0 max | 0.045 max | 0.03 max |
| S31008 | 0.08 | 24.0-26.0 | 19.0-22.0 | 0.5-1.5 | 2.0 max | 1.0 max | 0.045 max | 0.03 max |
| S31608 | 0.08 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 2.0 max | 1.0 max | 0.045 max | 0.03 max |
| Steel Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| S30210 | ≥ 205 | ≥ 515 | ≥ 40 | ≤ 187 |
| S30408 | ≥ 205 | ≥ 515 | ≥ 40 | ≤ 187 |
| S30403 | ≥ 205 | ≥ 515 | ≥ 40 | ≤ 187 |
| S31008 | ≥ 205 | ≥ 515 | ≥ 40 | ≤ 187 |
| S31608 | ≥ 205 | ≥ 515 | ≥ 40 | ≤ 187 |
The steel grades specified in the GB/T 12770 standard include:
Each grade is designed for specific mechanical properties and corrosion resistance, making them suitable for various applications.
Welded stainless steel tubes are widely used in:
In addition to the specified grades, alternative stainless steel grades may be considered based on specific requirements:
Haiyan Sanxin Steel Pipe Factory is a leading manufacturer of steel pipes in China. Located in a region with excellent geographical advantages, the factory is situated close to the Zhoushan Port and Ningbo Port.
Our factory covers an area of more than 25,000 square meters and has been in the steel pipe manufacturing business for 20 years. Over this period, we have accumulated a wealth of professional experience, which has helped us establish ourselves as a trusted name in the industry.
At our factory, we specialize in the production of various types of steel pipes, including stainless steel pipe, carbon steel pipe, copper pipe, steel pipe,seamless steel pipe and welded pipe. Our expertise in this field is evident from the 12 patents that we hold, which demonstrate our commitment to innovation and excellence.
A: manufacturer,also can do trading.
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.