UNS S31803 seamless duplex steel pipe, also known as Duplex 2205, is a high-strength, corrosion-resistant pipe with a dual-phase microstructure of austenitic and ferritic stainless steel. It offers excellent resistance to stress corrosion cracking, pitting, and crevice corrosion, particularly in chloride-rich environments like seawater. Standards: ASTM A790 / ASME SA790, ASTM A789 / ASME SA789
: Oil and gas, chemical processing, marine, heat exchangers, pressure vessels, and pipelines
Key Features
High tensile strength, fatigue resistance, and suitability for harsh environments; not recommended for temperatures above 300°C due to embrittlement risk
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