IS 2062 E450 BR / E450 C (High-Strength Structural Steel for Critical Applications) IS 2062 E450 BR and E450 C are high-strength structural steel grades under the IS 2062 standard, designed for applications requiring superior strength and durability. With a minimum yield strength of 450 MPa, these grades are ideal for heavy-duty structural frameworks and components subjected to high stress and dynamic loading. The BR grade offers proven impact resistance at low temperatures, while the C grade incorporates controlled carbon levels to enhance weldability and structural reliability. These steels are preferred for demanding construction and industrial projects, where strength-to-weight ratio, reliability, and performance under stress are essential. Key Features: High yield strength of 450 MPa for enhanced structural load capacity BR grade tested for impact resistance at 0°C, ensuring safe performance in colder climates C grade with optimized carbon content for better weld integrity and reduced heat-affected zone cracking Good formability and weldability, despite higher strength levels Typical Mechanical Properties: Property E450 BR / E450 C Yield Strength ≥ 450 MPa Tensile Strength 570–720 MPa Elongation ≥ 17% Impact Resistance BR: ≥ 27 Joules at 0°C Weldability Excellent Common Applications: High-rise buildings and large-span structures Heavy equipment frames and industrial platforms Bridges, towers, and offshore structures Transport and lifting equipment like cranes and booms Machinery bases and structural supports requiring superior strength Summary: IS 2062 E450 BR and E450 C offer exceptional strength, impact resistance, and weldability for heavy structural use. Suitable for high-stress environments, these grades ensure long-term structural integrity and performance, making them ideal for modern infrastructure and advanced engineering applications.