ASTM A691 GR CMSH-80

ASTM A691 GR CMSH-80 pipes are fabricated from carbon-manganese-silicon steel, conforming to the A537/A537M standard. These pipes undergo a quenching and tempering heat treatment process, which significantly enhances their strength and durability. The pipes have an outside diameter starting at 16 inches (405 mm) with wall thicknesses reaching up to 3 inches (75 mm). Chemical composition includes a balanced mix of carbon (C), manganese (Mn), silicon (Si), and other elements to achieve optimal performance characteristics. The typical hardness for this grade falls under 201 HB (Brinell Hardness).

These pipes meet strict dimensional tolerances with variations of +/- 0.5% in outer diameter and +/- 12.5% in wall thickness. The mechanical properties are notable, with a minimum tensile strength of 485 MPa and a yield strength of 275 MPa, ensuring exceptional resistance to deformation under pressure. The elongation rates, typically ranging from 18% to 22%, contribute to the material’s flexibility and adaptability.

ASTM A691 GR CMSH-80 undergoes rigorous heat treatment protocols, including stress relieving at 1100–1200°F (590–650°C) and tempering at 1100–1250°F (590–675°C). These processes refine the microstructure, enhancing ductility and resistance to wear. In addition, pipes are subject to a series of tests such as radiographic examination, ultrasonic testing, and pressure testing to ensure weld integrity and compliance with ASTM standards.

The robustness and reliability of ASTM A691 GR CMSH-80 pipes make them indispensable for transporting high-pressure fluids in challenging environments. Common applications include heat exchangers, refinery piping systems, boiler components, and structural applications in marine industries. These pipes are also suitable for use in conditions requiring exceptional resistance to thermal stress and mechanical wear.

Kwality Steelage Pvt Ltd, based in Mumbai, India, offers these pipes with options for various coatings, including black painting, epoxy coating, and 3LPE coating, ensuring corrosion resistance and extended service life. Pipes are available in lengths ranging from 5 meters to 13 meters, with customizable options to suit specific project requirements. With a production capacity of 5000 tons per month and adherence to stringent quality checks, Kwality Steelage ensures timely global deliveries, meeting diverse industrial demands.