22%Cr Duplex Sub-Arc wire.
Applications
Duplex stainless steel pipe, plate, fittings and forgings have an approximate 50:50 microstructure of austenite with a ferrite matrix. This, coupled with the general alloying level, confers:
- High strength compared with standard austenitic steels, eg type 316L
- Good general corrosion resistance in a range of environments
- High resistance to chloride-induced stress corrosion cracking (CSCC)
- High resistance to pitting attack in chloride environments, eg seawater. These alloys are finding widening application in the offshore oil/gas, chemical and petrochemical process industries, eg pipework systems, flowlines, risers, manifolds etc
Specification
AWS A5.9: ER2209
BS EN ISO 14343-A: 29 9 3 N L
BS EN ISO 14343-B: SS2209
BS2901: PT 2 22.8.3S92