IS 2002 Grade 1 (Carbon Steel for Pressure Vessel Applications) IS 2002 Grade 1 is a carbon-manganese steel grade commonly used in the fabrication of boilers, pressure vessels, and heat-exchange equipment. As per the IS 2002 Indian Standard, this grade is known for its moderate strength, thermal stability, and fabrication-friendly properties, especially under medium-pressure and temperature conditions. Typically supplied in a normalized condition, this steel ensures a uniform microstructure and better resistance to mechanical and thermal stress during service. Key Features: Developed for medium-pressure boiler and vessel applications Good weldability and ease of forming for complex shapes Normalized delivery condition enhances strength and grain uniformity Ideal for use in thermal, petrochemical, and energy sectors Mechanical Properties: Property IS 2002 Grade 1 Yield Strength ≥ 205 MPa Tensile Strength 410–530 MPa Elongation ≥ 22% Impact Resistance Moderate Operating Temperature Up to ~400°C (based on design) Applications: Boilers and steam generating units Pressure vessels in oil & gas refineries Heat exchangers, drums, and storage tanks Thermal plant equipment and economizers Headers and reactors operating under pressure Summary: IS 2002 Gr.1 offers a balance of workability, pressure resistance, and cost-effectiveness for manufacturing boiler and vessel components. It is widely accepted across Indian industries for its compliance with national standards and reliable performance under operational pressure.