ASTM A691 GR 2.25 CR

ASTM A691 GR 2.25 CR pipes are engineered to precise standards, available in sizes ranging from 1/2 inch to 36 inches nominal bore (NB) and wall thicknesses of up to 75 mm. These pipes accommodate a variety of industrial needs with customizable options, including plain, beveled, or threaded ends. The surface finish options, such as black painting, galvanization, and anti-corrosion coatings, further enhance their suitability for specific applications. Designed to adhere to ASTM specifications, these pipes undergo heat treatments like normalizing, quenching, and tempering, achieving tensile strength between 485 and 690 MPa and a minimum yield strength of 310 MPa.

The chemical composition of ASTM A691 GR 2.25 CR pipes includes 2.25% chromium and 1.0% molybdenum, delivering excellent resistance to oxidation and thermal stresses. The balanced mix of carbon, manganese, silicon, phosphorus, and sulfur enhances weldability, making these pipes a reliable choice for applications in oil refineries, chemical industries, marine systems, and structural frameworks. The superior mechanical properties, including 18% minimum elongation, ensure these pipes can withstand the pressures and temperatures of extreme operating environments.

These pipes are fabricated with strict dimensional tolerances, maintaining an outside diameter variation of ±1% and wall thickness tolerance of +12.5%/-10%. Multiple schedules, including SCH 40, SCH 80, SCH 120, SCH 160, and XXS, are offered to accommodate various operational requirements. Available in custom lengths up to 12 meters, ASTM A691 GR 2.25 CR pipes are suitable for diverse industrial setups. The advanced EFW manufacturing process ensures seamless welding with excellent mechanical stability, while rigorous testing, such as ultrasonic, radiographic, and hydrostatic examinations, guarantees product integrity.

Proper welding and heat treatment processes are integral to the performance of ASTM A691 GR 2.25 CR pipes. Stress relief is typically conducted at 1200–1400°F (650–760°C), with normalizing temperatures capped at 1850°F (1010°C). Quenching and tempering are performed as needed for enhanced mechanical properties. Post-Weld Heat Treatment (PWHT) is recommended for wall thicknesses exceeding 12 mm to reduce residual stresses. When compared to ASTM A691 GR 1.25 CR, these pipes exhibit superior strength due to higher chromium (2.00–2.50%) and molybdenum (0.90–1.10%) content, making them ideal for high-pressure, high-temperature environments.

Kwality Steelage Pvt. Ltd. ensures the highest quality standards by employing comprehensive testing methods and adhering to international certifications. The pipes are securely packaged in wooden boxes or bundles, with protective caps to prevent transit damage. With an extensive supply chain reaching the Middle East, Europe, Southeast Asia, and beyond, Kwality Steelage Pvt. Ltd. is a trusted partner for industrial projects worldwide. Contact us today to explore our premium range of ASTM A691 GR 2.25 CR Alloy Steel Pipes and secure customized solutions for your specific requirements.