Equal Angles, Grade 300, various sizes (Specified by size designation)
Equal angle sections are hot-rolled structural steel profiles with two equal length legs forming a 90-degree angle. Grade 300 designation indicates minimum yield strength of 300 MPa. Manufactured in Australia primarily by InfraBuild (300PLUS brand) and BlueScope Steel, with actual yield typically 320-340 MPa. Available in sizes from 20x20x3mm to 200x200x26mm with standard lengths of 6-18m. Features excellent weldability (CE<0.41), consistent mechanical properties, and established design standards through AS 4100:2020.
- Structural framing members in steel construction
- Bracing elements in portal frames and multi-storey buildings
- Connection angles for beam-column joints
- Lintels over openings in masonry construction
- Support brackets for mechanical equipment
- Roof and floor trusses
- Transmission towers and communication masts
- Industrial racking and shelving systems
- Architectural features and exposed steelwork
- Temporary works and scaffolding components
- Mining and infrastructure applications
- Agricultural buildings and sheds
Equal angle sections evolved from wrought iron angles used since the 1850s in construction. Australian production began in the early 1900s with BHP establishing steel making at Newcastle (1915) and Port Kembla (1928). The current AS/NZS 3679.1 standard was first published in 1974 as AS 1163, with Grade 300 designation introduced to align with 300 MPa minimum yield strength. Modern production uses continuous casting and automated rolling mills, achieving consistent properties and tighter tolerances than historical sections. The 300PLUS specification introduced by OneSteel (now InfraBuild) in the 2000s delivers typical yield strengths 20% above the minimum, improving structural efficiency.
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.