ASTM A790 / A790M is an international standard specification for seamless and welded ferritic/austenitic stainless steel pipe intended for general corrosive service. Often referred to as Duplex Stainless Steel, these pipes are engineered to deliver superior performance in demanding industrial environments.
The standard places particular emphasis on resistance to stress corrosion cracking, making it a preferred choice for applications where standard austenitic steels (like 304 or 316) might fail.
Key Features of ASTM A790
Material Type: Ferritic/Austenitic (Duplex) Stainless Steel.
Product Form: Seamless and Welded Pipe (typically larger diameters than tubing).
Core Advantage: Combines high strength (approx. 2x yield strength of 304/316) with excellent resistance to chloride stress corrosion cracking.
Common Grades: Includes UNS S31803, S32205, S32750 (2507), S32760 (Zeron 100), and others.
Typical Applications
ASTM A790 piping is essential for industries requiring robust, durable infrastructure:
Oil & Gas: Offshore platforms, flow lines, and risers.
Chemical Processing: Transporting aggressive acids and solvents.
Marine: Seawater cooling systems and desalination plants.
Pollution Control: Flue gas desulfurization systems.
Why Choose ASTM A790?
This standard mandates strict chemical composition limits and mechanical property requirements to ensure safety and longevity. All pipes must be heat-treated (solution annealed) and pass hydrostatic or nondestructive electric tests.
SUNLION supplies high-quality ASTM A790 duplex stainless steel pipes, fully compliant with international standards and certified for critical industrial applications.
