mineral / Metallic / Ferrous Sheet
Coated steel sheet (Colorbond/Zincalume), various profiles (0.42mm, 0.48mm, 0.55mm, 0.60mm BMT)
Premium Australian coated steel sheets with aluminium/zinc/magnesium alloy coating and optional paint system, engineered for 50+ year service life in harsh Australian conditions
Atlas code
MIN-MET-FSH-001
At-a-glance signals
Premium Australian coated steel sheets with aluminium/zinc/magnesium alloy coating and optional paint system, engineered for 50+ year service life in harsh Australian conditions
Overview
Executive summary
Colorbond and Zincalume are BlueScope's flagship coated steel products, featuring Activate® technology for enhanced corrosion resistance. Available in Base Metal Thickness (BMT) from 0.42mm to 0.60mm, with yield strengths of G300 (300 MPa) or G550 (550 MPa). Colorbond adds a five-layer paint system with Thermatech® solar reflectance technology, while Zincalume features the bare metallic coating for architectural applications.
Best when…
- 50+ year proven Australian performance
- Non-combustible, BAL-FZ compliant
- Lightweight (3.3-4.7 kg/m²)
- 100% recyclable
- 36-year warranty available
- 22 standard colours plus specialty finishes
- Thermatech® solar reflectance technology
- Activate® corrosion resistance technology
- Termite and rot proof
- Low thermal mass for improved comfort
Top advantages
- 01 50+ year proven Australian performance
- 02 Non-combustible, BAL-FZ compliant
- 03 Lightweight (3.3-4.7 kg/m²)
- 04 100% recyclable
- 05 36-year warranty available
Top limitations
- 01 Higher initial cost than some alternatives
- 02 Can dent under impact
- 03 Requires compatible fasteners and flashings
- 04 Thermal expansion requires proper detailing
- 05 Cut edges need protection in severe environments
Technical
Physical ·9
- Density
- 7850 kg/m³ Steel substrate density
- Specific gravity
- 7.85 dimensionless
- Porosity
- 0 %
- Water absorption
- 0 %
- Hardness
- 130 HV Vickers hardness of coating
- UV resistance
- Excellent 50+ years outdoor testing
- Chemical resistance
- Good Resistant to most atmospheric pollutants
- pH tolerance
- 4 – 9 pH Optimal performance range
- Surface roughness
- 1 μm Ra Smooth painted finish
Mechanical ·7
- Tensile strength
- 520 – 620 MPa G550 grade typical range
- Compressive strength
- 550 MPa G550 grade
- Flexural strength
- 550 MPa Based on yield strength
- Shear strength
- 330 MPa Approximately 0.6 × tensile
- Poisson's ratio
- 0.3 dimensionless
- Impact resistance
- Good Resists hail to 25mm diameter
- Creep resistance
- Excellent No creep at service temperatures
Sustainability & Health
Embodied carbon & energy ·7
- Embodied carbon
- 14.1 kg CO2-eq/m² 0.48mm BMT cradle-to-gate
- Carbon footprint
- 12.8 kg CO2-eq/m² 0.42mm BMT cradle-to-gate
- Embodied energy
- 148 MJ/m² Primary energy, 0.42mm BMT
- Water footprint
- 40.7 L/m² Net fresh water use
- Recycled content
- 25 % 15% pre-consumer, 10% post-consumer
- Renewable content
- 0 %
- Circular score
- 85 % High recyclability and durability
Compliance & Fire
Fire performance ·6
- Combustibility class
- Non-combustible per AS 1530.1
- Fire resistance level
- Non-combustible
- Ignition temp
- 500 °C Steel substrate
- Flame spread index
- 0 dimensionless AS 1530.3
- Smoke dev. index
- 0 dimensionless AS 1530.3
- Heat release rate
- 0 kW/m²
Cost & Lifecycle
Capex & lead time ·6
- Material cost (range)
- 18 – 40 $/m² 2024 prices, varies by product
- Material cost (per unit)
- 30 $/m² Typical Colorbond sheet
- Lead time
- 1 – 14 days Standard colours ex-stock
- Lifecycle cost
- 2.5 $/m²/year Over 50-year life
- Annual maintenance
- 0.5 $/m²/year Washing twice yearly
- Market availability
- Excellent - stocked nationally
Service life & durability ·2
- Expected lifespan
- 50 – 100 years With maintenance
- Maintenance interval
- 6 months Washing in marine/industrial areas
Layer D
Where it's used
Residential roofing (all profiles)
Commercial/industrial roofing and walling
Architectural cladding systems
Rainwater goods (gutters, downpipes)
Fencing and screening
Garage doors and roller shutters
Insulated panel systems
Bushfire-rated construction (BAL-FZ)
Coastal and marine environments
Cold storage facilities