GEN 2209 Overview
GEN 2209 is designed to weld duplex stainless steel which contains approximately 22% chromium such as S32205, S31803 and S32304. The microstructure of the welds consists of austenite and ferrite. The welds exhibit high tensile strength as well as improved resistance to stress corrosion cracking and pitting.
AWS Chemical Composition (Typical)
| %C | %Cr | %Ni | %Mo | %Mn |
|---|---|---|---|---|
|
0.03 max 0.01 |
21.5 – 23.5 22.85 |
7.5 – 9.5 8.6 |
2.5 – 3.5 3.2 |
0.50 – 2.00 1.60 |
| %Si | %P | %S | %Cu | %N |
|---|---|---|---|---|
|
0.90 max 0.40 |
0.03 max 0.018 |
0.03 max 0.001 |
0.75 max 0.12 |
0.08 – 0.20 0.14 |
Typical Weld Metal Mechanical Properties
| Tensile Strength | 100,000 psi | 689 MPa |
| Yield Strength | 80,000 psi | 552 MPa |
| Elongation | 22 % |
Typical Welding Parameters
| Process | Diameter | Voltage | Amperage | Gas/Flux |
|---|---|---|---|---|
| TIG (GTAW) | 1/16” (1.6 mm) | 10 – 12 | 80 – 150 | 100% Ar |
| 3/32” (2.4 mm) | 15 – 18 | 150 – 250 | 100% Ar | |
| 1/8” (3.2 mm) | 16 – 20 | 200 – 375 | 100% Ar | |
| MIG (GMAW) | .035” (0.9 mm) | 29 – 34 | 150 – 180 | 98% Ar – 2% O2 |
| .045” (1.1 mm) | 29 – 34 | 180 – 220 | 98% Ar – 2% O2 | |
| Sub Arc (SAW) | .093” (2.4 mm) | 28 – 32 | 300 – 450 | |
| .125” (3.2 mm) | 29 – 34 | 350 – 500 |