mineral / Metallic / Ferrous Structural
Unequal Angles, Grade 300, various sizes (Specified by size designation)
Hot-rolled structural steel angle sections with unequal legs, manufactured to AS/NZS 3679.1:2016 Grade 300 with minimum yield strength of 300 MPa
Atlas code
MIN-MET-FER-005
At-a-glance signals
Hot-rolled structural steel angle sections with unequal legs, manufactured to AS/NZS 3679.1:2016 Grade 300 with minimum yield strength of 300 MPa
Overview
Executive summary
Grade 300 unequal angle sections are hot-rolled structural steel products featuring legs of different lengths forming a 90-degree angle. Manufactured to AS/NZS 3679.1:2016, these sections offer nominal yield strength of 300 MPa with guaranteed mechanical properties. Available in sizes ranging from 65×50×5mm to 200×150×20mm, they provide versatile structural solutions for asymmetric loading conditions in Australian construction.
Best when…
- Asymmetric design suits specific loading conditions
- 300 MPa minimum yield strength provides reliable performance
- AS/NZS 3679.1:2016 compliance ensures quality
- ACRS certification available for quality assurance
- 90% recyclability supports circular economy
- Wide range of standard sizes available
- Compatible with all standard connection methods
- Suitable for all Australian climate zones with protection
- Local manufacturing ensures supply chain resilience
- Lower embodied carbon than concrete alternatives
Top advantages
- 01 Asymmetric design suits specific loading conditions
- 02 300 MPa minimum yield strength provides reliable performance
- 03 AS/NZS 3679.1:2016 compliance ensures quality
- 04 ACRS certification available for quality assurance
- 05 90% recyclability supports circular economy
Top limitations
- 01 Requires protective coating for corrosion resistance
- 02 Fire protection needed for rated assemblies
- 03 Asymmetric shape complicates some connections
- 04 Higher initial cost than timber alternatives
- 05 Thermal bridging in building envelope applications
Technical
Physical ·9
- Density
- 7850 kg/m³
- Specific gravity
- 7.85
- Porosity
- 0 %
- Water absorption
- 0 %
- Hardness
- 150 HB
- UV resistance
- Excellent with coating
- Chemical resistance
- Good with protection
- pH tolerance
- 4 – 10 pH
- Surface roughness
- 6.3 μm Ra
Mechanical ·7
- Tensile strength
- 440 MPa
- Compressive strength
- 300 MPa
- Flexural strength
- 300 MPa
- Shear strength
- 180 MPa
- Poisson's ratio
- 0.3
- Impact resistance
- 27 J at 0°C
- Creep resistance
- Negligible below 400°C
Sustainability & Health
Embodied carbon & energy ·7
- Embodied carbon
- 2100 kg CO₂e/tonne
- Carbon footprint
- 2.1 kg CO₂e/kg
- Embodied energy
- 32 MJ/kg
- Water footprint
- 70 L/kg
- Recycled content
- 25 %
- Renewable content
- 0 %
- Circular score
- 85 %
Compliance & Fire
Fire performance ·6
- Combustibility class
- Non-combustible
- Fire resistance level
- 30-240 minutes with protection minutes
- Ignition temp
- N/A - Non-combustible °C
- Flame spread index
- 0
- Smoke dev. index
- 0
- Heat release rate
- 0 kW/m²
Cost & Lifecycle
Capex & lead time ·6
- Material cost (range)
- 1200 – 1800 AUD/tonne
- Material cost (per unit)
- 1500 AUD/tonne
- Lead time
- 1-3 weeks standard sizes
- Lifecycle cost
- 2800 AUD/tonne
- Annual maintenance
- 20 AUD/m²/year
- Market availability
- Readily available
Service life & durability ·3
- Expected lifespan
- 50-100+ years
- Maintenance interval
- 5-10 years inspection
- Warranty period
- 10 years coating
Layer D
Where it's used
Structural framing in commercial and industrial buildings
Bracing members in steel structures
Lintels and shelf angles in masonry construction
Support brackets for mechanical equipment
Transmission tower construction
Agricultural and mining equipment frames
Renewable energy infrastructure components
Bridge and infrastructure supports
Architectural features and facades
Crane runway beams and supports