Weathering Steel (Corten) Sheet (1.5mm, 2.0mm, 3.0mm, 5.0mm, 6.0mm, 8.0mm)
High-strength weathering steel sheet that develops a protective rust patina, eliminating painting requirements. Available to AS/NZS 3678 WR350 specification with 350MPa minimum yield strength for structural and architectural applications in Australian conditions.
High-strength weathering steel sheet that develops a protective rust patina, eliminating painting requirements. Available to AS/NZS 3678 WR350 specification with 350MPa minimum yield strength for structural and architectural applications in Australian conditions.
Weathering steel (commonly known as Corten) is a high-strength, low-alloy structural steel that develops a stable, adherent oxide layer (patina) when exposed to atmospheric conditions. This protective rust-like appearance forms over 18-36 months in Australian climates through wet-dry cycles, providing superior corrosion resistance compared to conventional steel. The material is available in multiple thicknesses from 1.5mm to 8.0mm, conforming to AS/NZS 3678 Grade WR350 standards. Australian products include BlueScope REDCOR® steel, offering enhanced atmospheric corrosion resistance through copper, chromium, and nickel alloying elements.
- No painting required - self-protecting patina
- Lower lifecycle costs than painted steel
- 100% recyclable at end of life
- High strength-to-weight ratio (350MPa yield)
- Excellent aesthetic qualities with natural weathering
- 120+ year design life in appropriate environments
- Suitable for all BAL ratings (AS 3959)
- Self-healing if scratched or damaged
- Low maintenance requirements
- CSIRO-verified performance in Australian climates
- 01 No painting required - self-protecting patina
- 02 Lower lifecycle costs than painted steel
- 03 100% recyclable at end of life
- 04 High strength-to-weight ratio (350MPa yield)
- 05 Excellent aesthetic qualities with natural weathering
- 01 Initial rust runoff can stain adjacent materials
- 02 18-36 months for full patina development
- 03 Not suitable for marine environments <1km from coast
- 04 Requires drainage - cannot tolerate ponding water
- 05 Higher initial cost than carbon steel (20-30% premium)
- Density
- 7850 kg/m³
- Specific gravity
- 7.85
- Porosity
- 0 %
- Water absorption
- 0 %
- Hardness
- 170
- UV resistance
- Excellent // No UV degradation
- Chemical resistance
- Good // Resistant to most atmospheric pollutants
- pH tolerance
- 4-10
- Surface roughness
- 25 µm
- Tensile strength
- 480 MPa
- Compressive strength
- 350 MPa
- Flexural strength
- 350 MPa
- Shear strength
- 210 MPa
- Poisson's ratio
- 0.3
- Impact resistance
- 27
- Creep resistance
- Excellent // at service temperatures
- Embodied carbon
- 19.6
- Carbon footprint
- 2.5
- Embodied energy
- 35 MJ/kg
- Water footprint
- 64 L/kg
- Recycled content
- 25 %
- Renewable content
- 0 %
- Circular score
- 95
- Combustibility class
- Non-combustible // AS 1530.1
- Fire resistance level
- 0/0/0 // Unprotected steel
- Flame spread index
- 0
- Smoke dev. index
- 0
- Heat release rate
- 0
- Material cost (range)
- $2800-3500/tonne // AUD 2025 prices
- Material cost (per unit)
- $22-27/m² // 2.5mm thickness
- Lead time
- 2-4 weeks // Standard thicknesses ex-stock
- Lifecycle cost
- $70-100/m² // 50-year analysis
- Annual maintenance
- $0.50/m² // Minimal - inspection only
- Market availability
- Good // Major cities, special order regional
- Expected lifespan
- 50-120 years // Environment dependent
- Maintenance interval
- Annual inspection // Check drainage
- Warranty period
- 10-25 years // Manufacturer dependent