ER2209 – wire and rod for duplex 2205
Duplex 22Cr-9Ni-3Mo-N filler metal, used on duplex 2205 steels (UNS S31803/S32205) and in joints of duplex with austenitic stainless or carbon steel.
Product forms and equivalents
| Process | Classification |
|---|---|
| TIG rod (GTAW) | ER2209 |
| Solid MIG/MAG wire (GMAW) | ER2209 |
| Covered electrode (SMAW) | E2209-16/-17 – AWS A5.4 |
| Flux-cored wire (FCAW) | E2209T0-1/-4 – AWS A5.22 |
| Submerged arc wire (SAW) | ER2209 + flux |
| Designation | Value |
|---|---|
| AWS | ER2209 |
| Specification | AWS A5.9/A5.9M / ASME SFA-5.9 |
| UNS | S39209 |
| Others | EN ISO 14343-A: W/G 22 9 3 N L; W.Nr. 1.4462 |
Chemical composition (%)
| Element | wt. % |
|---|---|
| C | ≤ 0.03 |
| Cr | 21.5 – 23.5 |
| Ni | 7.5 – 9.5 |
| Mo | 2.5 – 3.5 |
| N | 0.08 – 0.20 |
| Mn | 0.50 – 2.0 |
| Si | ≤ 0.90 |
| P | ≤ 0.03 |
| S | ≤ 0.03 |
| Cu | ≤ 0.75 |
Properties of the deposited metal
| Property | Value |
|---|---|
| Tensile strength of deposited metal | ≥ 690 MPa (AWS A5.4 minimum for E2209, reference) |
| Elongation | ≥ 20 % (AWS A5.4 minimum for E2209, reference) |
Materials welded with ER2209
Dissimilar joints: Indicated for joining duplex 2205 to 304L/316L stainless and to carbon steel.
Why the composition differs from the base metal
The wire has about 9 % Ni, versus 5–6 % in 2205. As the bead cools quickly, without the plate's solution annealing, it would tend to end up with too much ferrite; the extra nickel favors austenite and brings the balance closer to 50/50 between the phases.
Welding precautions
- Typical heat input of 0.5 to 2.5 kJ/mm and maximum interpass of 150 °C to avoid intermetallic phases.
- TIG with pure argon or argon with up to 2 % N2; purge with argon or argon-nitrogen.
- Do not weld the root autogenously (without wire): the bead becomes excessively ferritic.
- Normally there is no preheating or PWHT.
Frequently asked questions
What is ER2209 used for?
Duplex 22Cr-9Ni-3Mo-N filler metal, used on duplex 2205 steels (UNS S31803/S32205) and in joints of duplex with austenitic stainless or carbon steel.
Why is the composition of ER2209 different from the material it welds?
The wire has about 9 % Ni, versus 5–6 % in 2205. As the bead cools quickly, without the plate's solution annealing, it would tend to end up with too much ferrite; the extra nickel favors austenite and brings the balance closer to 50/50 between the phases.
Which covered electrode corresponds to ER2209?
E2209-16/-17 – AWS A5.4.
What precautions apply when welding with ER2209?
Typical heat input of 0.5 to 2.5 kJ/mm and maximum interpass of 150 °C to avoid intermetallic phases. TIG with pure argon or argon with up to 2 % N2; purge with argon or argon-nitrogen. Do not weld the root autogenously (without wire): the bead becomes excessively ferritic. Normally there is no preheating or PWHT.
