Duplex Steel S31803 Flanges Manufacturer

Astec Tubes, for years has been a trusted supplier and manufacturer of Duplex 31803 Flanges. Duplex Steel S31803 Flanges are ferrite-austenitic grades that use the combination of the strength of ferritic steel with the corrosion resistance of austenitic steel. The Duplex Steel S31803 Flanges supplier delivers material across oil and gas, chemical processing, desalination, and marine sectors where standard austenitic flanges sensitise at elevated temperatures or fail in chloride environments.

Duplex Steel S31803 Flanges deliver UNS S31803 mechanical properties that exceed comparable austenitic grades by a wide margin minimum yield strength of 450 MPa against 210 MPa for standard 316L, and double the pitting resistance equivalent number (PREN above 34). UNS S31803 equivalent material covers EN 1.4462, often specified interchangeably in European procurement. At high operating temperatures, these flanges sustain structural integrity where austenitic alternatives begin to creep.

These flanges have a silver-plated nut that extends their life. These flanges are galling resistant. Galling refers to the impact on steel caused by temperature changes from cold to hot. As a result, they are well-equipped to perform at high temperatures. For a long time, they remain leak-free and undamaged. This is a testimony to its sturdiness. And it is for this purpose that they are widely used in applications involving fluid transportation. These stainless steel flange grades are the most rugged of all those on the market. Because of its standard mechanical strength and chemical composition, it can be used in a variety of industries.

Food processing, chemical processing, paper and pulp, and other industries that use fluids extensively include these. It is widely used in a variety of industries, including hydraulic and chemical. It has a seal that prevents leaks and gas leaks, making it highly safe to use in a variety of industrial and domestic applications.