JIS G3466 STKR 400 ERW Square Pipe

JIS G3466 STKR 400 ERW Square Pipe is a carbon steel hollow structural section manufactured to Japanese Industrial Standard for general structural applications. This STKR 400 grade square pipe offers excellent weldability and reliable mechanical properties for construction and engineering projects.

Product Parameters

Square size range: 20mm x 20mm to 350mm x 350mm .

Regular sizes include 25×25, 30×30, 40×40, 50×50, 60×60, 80×80, 100×100, 125×125, 150×150, 200×200 mm.

Wall thickness: 1.2mm to 12.5mm .

Common thicknesses: 1.6, 2.0, 2.3, 2.8, 3.2, 4.0, 4.5, 5.0, 6.0 mm .

Length: 6 meters standard, we offer custom lengths up to 8.6 meters or as required .

Processing technique: ERW (Electric Resistance Welded) with cold forming or hot finishing .

Execution standards: JIS G3466 . Packaging: Seaworthy bundles with steel strips, waterproof wrapping, and edge protectors. Surface treatment: Black bare, oiled, painted, galvanized, or as requested .

Chemical Composition (Typical %)

Carbon (C): 0.25 max
Manganese (Mn): Not specified
Phosphorus (P): 0.040 max
Sulfur (S): 0.040 max
Silicon (Si): Not specified

Physical Properties

Tensile Strength: 400 MPa minimum
Yield Strength: 245 MPa minimum
Elongation: 23 percent minimum (No.5 test piece)
Density: 7850 kg/m³

Product Applications

Building structural frameworks and columns . Logistics pallets and storage racks . Fencing, gates, and handrails. Civil engineering and construction works . Machinery frames and equipment bases. Automotive components and trailers.