GEN 409Nb Overview
GEN 409Nb is a ferritic stainless steel welding wire which is used to weld type 409 and 409Ti base alloys. The niobium addition forms carbides to improve corrosion resistance and promote the ferritic microstructure.
AWS Chemical Composition (Typical)
| %C | %Cr | %Ni | %Mo | %Mn |
|---|---|---|---|---|
|
0.08 0.03 |
10.5 – 13.5 11.34 |
0.60 max 0.27 |
0.50 max 0.042 |
0.80 max 0.52 |
| %Si | %P | %S | %Cu | %Cb (Nb) |
|---|---|---|---|---|
|
1.00 max 0.53 |
0.04 max 0.021 |
0.03 max 0.002 |
0.75 max 0.02 |
10xC – 0.75 0.40 |
Typical Weld Metal Mechanical Properties
| Tensile Strength | 68,000 psi | 469 MPa |
| Yield Strength | 50,000 psi | 345 MPa |
| Elongation | 23% |
Typical Welding Parameters
| Process | Diameter | Voltage | Amperage | Gas/Flux |
|---|---|---|---|---|
| TIG (GTAW) | 1/16” (1.6 mm) | 14 – 17 | 90 – 130 | 100% Ar |
| 3/32” (2.4 mm) | 15 – 20 | 120 – 170 | 100% Ar | |
| 1/8” (3.2 mm) | 16 – 20 | 200 – 350 | 100% Ar | |
| MIG (GMAW) | .035” (0.9 mm) | 29 – 33 | 160 – 190 | 98%Ar – 2%O2 |
| .045” (1.1 mm) | 29 – 33 | 180 – 220 | 98%Ar – 2%O2 | |
| Sub Arc (SAW) | .093” (2.4 mm) | 28 – 32 | 250 – 450 | |
| .125” (3.2 mm) | 29 – 34 | 300 – 500 |