Form · Sizes pending
Metallic — indicative fig. M·75
Fire A1 Non-combustibleEmbodied carbon 26kgCO₂e/kg HighCompressive 440MPa StructuralDesign life 50yr
Hot-rolled universal beam structural steel section, Grade 300 minimum yield strength, suitable for primary and secondary beams, columns and general structural applications in Australian construction
01 Physical
Density 7850kg/m³
Specific gravity 7.85
Porosity 0%
Water absorption 0%
Hardness 160
UV resistance high
Chemical resistance moderate
pH tolerance 4-10
Surface roughness 12.5µm
02 Mechanical
Tensile strength 440MPa
Compressive strength 440MPa
Flexural strength 300MPa
Shear strength 180MPa
Poisson's ratio 0.3
Impact resistance high
Creep resistance excellent
03 Thermal
Thermal conductivity 55W/m·K
Specific heat 460J/kg·K
Thermal expansion 0.000012×10⁻⁶/°C
04 Compliance & Fire First question
Combustibility class non-combustible
Fire resistance level 0-240 minutes
Flame spread index 0
Smoke dev. index 0
Heat release rate 0
05 Sustainability & Health
Embodied carbon 25.9
Carbon footprint 1.85
Embodied energy 38.8MJ/kg
Recyclability 98%
Recycled content 82%
Renewable content 0%
Circular score 95
VOC emissions 0
Toxicity rating non-toxic
LEED contribution 3
06 Durability · Cost · Logistics
Expected lifespan 50-100+ years
Maintenance interval Annual inspection, 5-20 year recoating
Warranty period 12 months materials
Material cost (range) $1800-2200/tonne
Material cost (per unit) $43-45/m
Lead time 1-3 days stock, 2-4 weeks custom
Lifecycle cost $2500-3500/tonne
Annual maintenance $5-15/m²
Market availability excellent
07 Assessment
Advantages
- High strength-to-weight ratio (300 MPa minimum yield)
- 98% recyclable with infinite recyclability
- Non-combustible - suitable for all BAL zones
- Consistent quality with ACRS certification
- Readily available from multiple Victorian suppliers
- Established design standards (AS 4100:2020)
- Long service life (50-100+ years)
- Excellent weldability without preheating
- Locally manufactured reducing transport emissions
- Compatible with modular construction methods
Constraints
- Requires fire protection for FRL ratings
- Thermal bridging requires mitigation
- Corrosion protection essential in all environments
- Skilled labour required for welding and erection
- No inherent acoustic properties
- High thermal conductivity (50-60 W/m·K)
- Initial cost volatility with global steel markets
- Heavy sections require mechanical handling
- Susceptible to buckling under compression
- Maintenance of protective coatings required
08 Applications
A1 Primary and secondary structural beams
A2 Building columns and posts
A3 Portal frame construction
A4 Multi-storey steel frames
A5 Bridge girders and supports
A6 Industrial buildings and warehouses
A7 Mining infrastructure
A8 Mezzanine floors
A9 Cantilever structures
A10 Composite floor systems
09 Sources & Standards
Sources pending — citations for this material are not yet recorded. Verify all figures against manufacturer data and current standards before specifying.