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 different methods, such as welded steel pipes (including resistance welding, forge welding, or automatic arc welding) or seamless pipes, which are then shaped into a square cross-section. Importantly, JIS G3466 carbon steel square tubes must be produced without any heat treatment.

The standard JIS G3466 covers carbon steel square and rectangular tubes for general structural purposes. It outlines the specifications for materials used in building structures, bridges, and other engineering projects. The common grades available under this standard include STKR 400 and STKR 490, with a variety of sizes and wall thicknesses to suit different applications.

Common Pipe 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.

JIS G3466 carbon steel square tubes are known for their high strength, durability, and versatility, making them ideal for load-bearing structures. They are commonly used in construction, automotive, and industrial equipment where reliable performance is essential. The material's mechanical properties ensure it can withstand various stresses and environmental conditions. Whether for small-scale projects or large infrastructure developments, these tubes provide a cost-effective and durable solution.

30*12 Carbide Insert Blade

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