Learn why ER2209 is commonly used for duplex 2205 welding and how heat input, ferrite balance, shielding, and interpass temperature affect results.
Yes. ER2209 is one of the standard filler-metal choices for welding duplex 2205 stainless steel.
Why Is ER2209 a Good Match?
Its chemistry is designed to produce weld metal with a suitable balance of austenite and ferrite after welding.
Why Does Phase Balance Matter?
Too much ferrite can reduce toughness and corrosion performance. Excessive austenite or harmful secondary phases may also impair properties.
Which Variables Affect the Balance?
- Heat input
- Cooling rate
- Interpass temperature
- Shielding and backing gas
- Nitrogen content
- Joint thickness
- Number of passes
Is Autogenous Welding Recommended?
Autogenous welding may not develop the required phase balance in many applications. Filler-metal use should follow the approved procedure.
Dayang Welding supplies ER2209 wire and recommends strict control of duplex welding procedures.
