Duplex stainless steels are called “duplex” because they have a two-phase microstructure consisting of grains of ferritic and austenitic stainless steel. When duplex stainless steel is melted it solidifies from the liquid phase to a completely ferritic structure. As the material cools to room temperature, about half of the ferritic grains transform to austenitic grains (“islands”). The result is a microstructure of roughly 50% austenite and 50% ferrite.

Pipes & Tubes

Grade: 2205 (UNS No. S31803), 2207 (UNS No. S32760)

Sheets & Plates

Grade: 2205 (UNS No. S31803), 2207 (UNS No. S32760)

Bars

Grade: 2205 (UNS No. S31803), 2207 (UNS No. S32760)

Butt Welding Fittings

Grade: 2205 (UNS No. S31803), 2207 (UNS No. S32760)

Forged Fittings

Grade: 2205 (UNS No. S31803), 2207 (UNS No. S32760)

Flanges

Grade: 2205 (UNS No. S31803), 2207 (UNS No. S32760)