Duplex stainless steels:
- Are about twice as strong as regular austenitic or ferritic stainless steels
- Have a range of corrosion resistance
- Show good stress corrosion cracking resistance
- Have lower nickel and molybdenum contents than their austenitic counterparts of similar corrosion resistance, resulting in lower cost
Duplex stainless steels are commonly used in applications that have exposure to chlorides and require crevice corrosion resistance.