General characteristics:

Ferritic-austenitic stainless steel also referred to as duplex stainless steels, combine many of the beneficial properties of ferritic and austenitic steels. Due to the high content of chromium and nitrogen, and often also molybdenum, these steels offer good resistance to localized and uniform corrosion. The duplex microSteel structure contributes to the high strength and high resistance to stress corrosion cracking. Duplex steels have good weldability.

**  Optional bolting flanges on duplex tanks will be made of 316L SS.

Characteristic properties:

2205 Stainless Steel• Good to very good resistance to uniform corrosion

• Good to very good resistance to pitting and crevice corrosion

• High resistance to stress corrosion cracking and corrosion fatigue

• High mechanical strength

• Good abrasion and erosion resistance

• Good fatigue resistance

• High energy absorption

• Low thermal expansion

• Good weldability


• Pulp and paper industry

• Desalination plants

• Flue-gas cleaning

• Cargo tanks and pipe systems in chemical tankers

• Seawater systems

• Firewalls and blast walls on offshore platforms

• Bridges

• Components for structural design

• Storage tanks

• Pressure vessels

• Heat exchangers

• Water heaters

• Rotors, impellers and shafts

• Reinforcing bars for concrete structures

Material Pitting Resistance Chloride Level(ppm)
304 19 <200
316 24 <200
316L 26 200 – 1000
Duplex 35 200 – 3600