Unequal Angles, Grade 300, various sizes (Specified by size designation)
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.
- 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
Steel angle sections have been fundamental to Australian construction since the establishment of BHP steelworks in 1915. The development of AS 3679 in 1975 (now AS/NZS 3679.1:2016) standardised structural steel production in Australia. Grade 300 designation was introduced to align with international standards while maintaining suitability for Australian conditions. Modern production at Port Kembla and Whyalla facilities incorporates up to 25% recycled content through electric arc furnace technology, with ongoing development toward lower emissions steelmaking including the planned electric arc furnace at New Zealand Steel's Glenbrook facility.
DISCLAIMER: This specification document is generated from the CLAD Materials Atlas Database. Information is for general guidance only and does not constitute professional engineering advice. Values are typical and may vary by batch, manufacturer, and production run. Verify suitability for specific project applications independently.