JIS G3466 Carbon Steel Square Tube
The JIS G3466 carbon steel square tube is widely used in civil construction and other structural applications. These tubes can be manufactured using various methods, including welded steel pipes (resistance welded, forge welded, or automatic arc welded) or seamless pipes, and are shaped into a square cross-section. Importantly, JIS G3466 carbon steel square tubes must be produced without any heat treatment.
This standard specifies the requirements for square and rectangular carbon steel tubes used in general structural purposes, such as in building frameworks, bridges, and industrial structures. The most commonly used grades under this specification are STKR 400 and STKR 490, which offer different mechanical properties to suit various engineering needs.
Dimensions and Grades:
- Grade: STKR 400, STKR 490
- Square Sizes: 40×40 mm to 350×350 mm
- Rectangular Sizes: 20×50 mm to 200×400 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 specifications ensure that the JIS G3466 carbon steel square tubes meet the required strength, durability, and formability standards for use in a wide range of structural applications. Whether for residential buildings, commercial structures, or heavy industrial projects, these tubes provide reliable performance and consistent quality. Always refer to the latest version of the JIS G3466 standard for detailed technical information and compliance requirements.
Reactive Silicone Fluid
Silicone Oil,Modified Silicone Material,Dimethyl Siloxane,PC Modifier
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