385,00 €
– Name: Hot-Dipped Galvanized Rectangular Tube (commonly referred to as 80×120 square/flat bars).
– Physical dimensions: Length 120mm, width 80mm, wall thickness 3.0mm.
– Cross-section: Hollow rectangular shape with rounded edges (R ≈ 2–3 times the thickness of the wall).
– Standard length: 6 m/piece (customizable to 4–12 m lengths)
– Execution standards: – Base pipe: GB/T 6728-2017 Structural cold-formed hollow steel profiles.
– Galvanizing: GB/T 13912-2020 Metal Coating Layer – Hot-Dipped Galvanized Layer
Availability: 1000 in stock
– Base material: Mainly Q235B (low-carbon structural steel), also available as Q355B (previously Q345B).
– Forming: hot-rolled/cold-rolled strip steel → cold bending and forming → high-frequency seamless welding.
– Galvanizing process: hot-dip galvanizing – rust removal → aid coating → immersion in zinc bath at around 450°C → cooling → passivation.
– Zinc coating: ≥180–300 g/m² (both sides)
– Features: Thick coating, strong adhesion, excellent corrosion resistance, long lifespan.
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