Duplex Steel S31803 Pipes

About Duplex Steel S31803 Pipes

Duplex Steel 31803 pipes are also known as UNS S31803 or SAF 2205 and are a dual-phase alloy combining austenitic and ferritic microstructures in a near-equal ratio. This two-phase structure gives the material roughly twice the yield strength of standard austenitic grades like 304 or 316. The grade offers outstanding resistance to chloride stress corrosion cracking, pitting, and crevice corrosion, making it a practical choice for aggressive chemical and marine environments. Industries including oil and gas, chemical processing, marine engineering, and water treatment rely on it for its strength, long service life, and lower material cost per unit of performance.