Tianjin Brisk Metalwork Co., Ltd. is one of the leading manufacturers and suppliers of stkr 400 carbon steel tube in China. We have world-leading production equipment and strong manufacturing capabilities. Please feel free to buy bulk durable stkr 400 carbon steel tube from our factory.
Tianjin Brisk Steel is one of the manufacturers of STKR 400 Carbon Steel Tube in China. Our products are mainly exported to the Middle East, Southeast Asia, Europe, New Zealand, and other regions.If you would like to learn more about our products, feel free to contact us and send your purchase list.
PRODUCT
Tianjin BRISK STEEL focus on produce and supply hollow section and steel pipe
Key Specification
| Type | Specification |
|
Standard |
JIS G 3466 (Japanese Industrial Standard for general structure) |
| Grade | STKR 400 (Structural Tube Key, Low Carbon Steel) |
| Shape | Square (SHS) / Rectangular (RHS) |
| Process | ERW (Electric Resistance Welded) / SMLS / Cold-formed |
|
Outer Diameter (OD) |
20x20mm ~ 1200x1200mm (SHS) 20x30mm ~ 1200x1500mm (RHS) |
|
Wall Thickness (WT) |
1.3mm ~ 50mm |
|
Length |
5.8m, 6m, 12m, or custom cut lengths (max length up to 18m) |
| Pipe End | Thread Turning, Flaring, Bevelling, Flattening, etc. |
|
Surface Treatment |
Black (bare) / Pre-galvanized / Hot-dip Galvanized (GI) |
Chemical Composition
| Chemical composition % | |||||
| Symbol of grade | C | Si | Mn | P | S |
| STKR400 | 0.25 max. | 一 | 一 | 0.040 max. | 0.040 max. |
Mechanical Properties
| Mechanical Properties | ||||
| Symbol of grade | Tensile strength N/mm² |
Yield point or proof stress N/mm² |
Elongation % |
|
| Tensile test piece | Test direction | |||
| Test piece No.5 | Tube axis direction | |||
| STKR400 | 400 min. | 245 min. |
23 min. |
|
Core Advantages
- Excellent Weldability & Formability: Low carbon content ensures easy welding, cutting, and bending.
- High Structural Strength: Reliable rigidity for medium-load bearing applications.
- Cost-Effective: Balances performance and economy for general structural use.
- Versatile Sizes: Full range of square/rectangular profiles in stock.
Packing
Main Applications
- Building & Construction: Steel structures, columns, beams, scaffolding, fencing
- Machinery & Equipment: Frames, supports, brackets, chassis
- Automotive: Vehicle frames, structural components
- Warehouses: Storage racks, shelving systems
Contact Us
If you are interested in our STKR 400 Carbon Steel Tube, please contact us with your specific requirements (specifications, quantity, material, surface treatment, etc.), and we will provide you with a detailed quotation and product sample as soon as possible. We look forward to establishing long-term cooperative relationships with you!
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