Some important Information of S31803 Duplex Stainless Steel Flanges

These flanges can withstand temperatures of up to 300 degrees Celsius. The flanges could become embrittled if the temperature is raised above the specified level. Additionally, UNS S31803 Duplex Stainless Steel Flanges have good corrosion resistance in settings that contain a variety of acidic components, such as sulphuric acid and chlorine.

These are also ductile and can exhibit this quality even at very low temperatures. Heat treatment is another way to make these flanges tougher. These flanges are frequently used in maritime and off-shore conditions because they have a higher chromium concentration than the other stainless steel alloys and can withstand chlorine.

Advantages of UNS S31803 Duplex Stainless Steel Flanges


Duplex stainless steels have above-average ductility even though they are no longer the most ductile stainless steels on the market. A remarkable number of objects can be flattened and made with this technique. Duplex stainless steels aren’t far behind austenitic stainless steels in terms of ductility. The fact that duplex stainless steels are significantly more ductile than ferritic stainless steel must also be highlighted. Examples are round bars of duplex steel.


The duplex stainless steel ranks highly in terms of toughness. They are significantly harder than ferritic stainless steels, though not quite as hard as austenitic stainless steels. They can take a hammering thanks to this technique, defying the effects of physical violence without breaking or cracking.

Weld ability

Duplex stainless steel struggles when it comes to welding. Because of its unique structural consistency, it tends to soften when exposed to extremely high temperatures. Austenitic stainless steels are far more weld-friendly overall.

Corrosion Resistance

Duplex stainless steel, as previously mentioned, is remarkably resistant to pressure corrosion cracking. It is also fairly resistant to rust on top of all that. Additionally, it should be mentioned that it resists chlorine corrosion quite well. In terms of corrosion resistance, the duplex is essentially one of the better materials. It thrives in damp environments because of its exceptional anti-corrosive properties. It can handle regular contact with both freshwater and saltwater