JIS G3466 Carbon Steel Square Tube
JIS G3466 carbon steel square tubes are widely used in civil construction and other structural applications. These tubes can be manufactured using various methods, including welded steel pipes (such as resistance welding, forge welding, or automatic arc welding) or seamless pipes, to achieve a square cross-sectional shape. Importantly, JIS G3466 carbon steel square tubes are produced without any heat treatment, ensuring consistent mechanical properties and structural integrity.
The standard JIS G3466 specifies the requirements for square and rectangular steel tubes intended for general structural purposes, such as in building frameworks, bridges, and industrial equipment. Common grades include STKR 400 and STKR 490, which are suitable for different load-bearing applications depending on their strength and dimensional specifications.
Available Sizes:
- Square Tubes: 40x40 mm to 350x350 mm
- Rectangular Tubes: 20x50 mm to 200x400 mm
- Wall Thickness: 1.6 mm to 12 mm
Chemical Composition:
| Grade Designation | Chemical Composition | ||||
|---|---|---|---|---|---|
| C | Si | Mn | P | S | |
| STKR 400 | 0.25 max. | - | - | 0.040 max. | 0.040 max. |
| STKR 490 | 0.18 max. | 0.55 max. | 1.50 max. | 0.040 max. | 0.040 max. |
Mechanical Properties:
| Grade Designation | Tensile Strength N/mm² {kgf/mm²} |
Yield Point or Proof Stress N/mm² {kgf/mm²} |
Elongation % (No.5 Test Piece) |
|---|---|---|---|
| STKR 400 | 400 {41} min. | 245 {25} min. | 23 min. |
| STKR 490 | 490 {50} min. | 325 {33} min. | 23 min. |
These JIS G3466 carbon steel square tubes are ideal for use in construction projects that require strong, durable, and dimensionally accurate structural components. The material's composition and mechanical properties make it well-suited for both indoor and outdoor applications where reliability is key. Whether you're working on a residential, commercial, or industrial project, these tubes offer excellent performance and cost-effectiveness.
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