Form · Sizes pending
Metallic — indicative fig. M·76
Fire A1 per AS 1530.1 Non-combustibleEmbodied carbon 1.71kgCO₂e/kg Low–mediumCompressive 300MPa StructuralDesign life 100yr Durable
Hot-rolled structural steel H-sections manufactured to AS/NZS 3679.1:2016 with 300 MPa minimum yield strength, used primarily as columns in construction and engineering applications
01 Physical
Density 7850kg/m³
Specific gravity 7.85
Porosity 0%
Water absorption 0%
Hardness 140
UV resistance High
Chemical resistance Moderate
pH tolerance 4-12
Surface roughness 12.5µm
02 Mechanical
Tensile strength 440MPa
Compressive strength 300MPa
Flexural strength 300MPa
Shear strength 180MPa
Poisson's ratio 0.3
Impact resistance 27
Creep resistance High below 400°C
03 Thermal
Thermal conductivity 50W/m·K
Specific heat 480J/kg·K
Thermal expansion 12×10⁻⁶/°C
04 Compliance & Fire First question
Combustibility class Non-combustible per AS 1530.1
Fire resistance level Unprotected: 15-30 min; Protected: up to 240 min
Flame spread index 0
Smoke dev. index 0
Heat release rate 0
05 Sustainability & Health
Embodied carbon 1710kgCO2e/tonne
Carbon footprint 1.71
Embodied energy 20100MJ/kg
Water footprint 28L/kg
Recyclability 90%
Recycled content 15%
Renewable content 0%
Circular score 82
VOC emissions 0
Toxicity rating Non-toxic
LEED contribution 2
06 Durability · Cost · Logistics
Expected lifespan 100+ years
Maintenance interval 5-10 years
Warranty period Manufacturer: 10-25 years on coating systems
Material cost (range) $1800-2800 AUD/tonne
Material cost (per unit) $250-450 AUD/m
Lead time Ex-stock to 4 weeks
Lifecycle cost $400-700 AUD/m
Annual maintenance $5-15 AUD/m²
Market availability Readily available
07 Assessment
Advantages
- Equal strength properties in both major axes
- Excellent buckling resistance under compression
- High torsional rigidity preventing twisting
- Readily available in Australian market
- Consistent quality from local production
- Excellent weldability with controlled carbon equivalent
- 90% recyclability at end-of-life
- ACRS certification available
- Compatible with Australian construction practices
- Wide range of standard sizes available
Constraints
- Higher material cost compared to timber alternatives
- Requires fire protection for rated assemblies
- Susceptible to corrosion without protection
- Thermal bridging in building envelopes
- Skilled labour required for installation
- Heavy sections require crane handling
- Limited aesthetic appeal without cladding
- Embodied carbon from primary steel production
08 Applications
A1 Primary structural columns in multi-storey buildings
A2 Bridge piers and supports
A3 Industrial facility frameworks
A4 Mining infrastructure supports
A5 Portal frame columns
A6 Crane runway columns
A7 Transmission tower structures
A8 Marine wharf piles
A9 Temporary works and formwork supports
A10 Composite steel-concrete columns
09 Sources & Standards
Sources pending — citations for this material are not yet recorded. Verify all figures against manufacturer data and current standards before specifying.