AWS A5.4 E2209-16
E2209-16
Alloy 2209 is used to weld duplex stainless steels such as UNS Number N31803. The welds offer excellent resistance to stress corrosion cracking and pitting. The micro-structure of the weld metal consists of austenite and ferrite. The ferrite of weld metal will be lower than the ferrite of Type 2205 base metal. Welding of duplex stainless steels calls for controlled parameters to achieve specified mechanical and corrosion resistance properties.
Specifications:
| C | Cr | Ni | Mo | Mn | Si | P | S | N | Cu | Fe | X | %X |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.04 max | 21.5-23.5 | 8.5-10.5 | 2.5-3.5 | 0.5-2.0 | 1.00 max | 0.04 max | 0.03 max | 0.08-0.20 | 0.75 max | BAL | – | – |