GEN 347 Overview
GEN 347 is generally used for welding Cr‐Ni stainless steel base metals of similar chemical composition stabilized with either Ti or Nb (Cb). The presence of Nb (Cb) minimizes the possibility of intergranular carbide precipitation and thus susceptibility to intergranular corrosion.
AWS Chemical Composition (Typical)
| %C | %Cr | %Ni | %Mo | %Mn |
|---|---|---|---|---|
| 0.08 max 0.05 |
19.0 – 21.5 19.5 |
9.0 – 11.0 9.1 |
0.75 max 0.21 |
1.0 – 2.5 1.7 |
| %Si | %P | %S | %Cu | %Nb+Ta |
|---|---|---|---|---|
| 0.30 – 0.65 0.46 |
0.03 max 0.02 |
0.03 max 0.01 |
0.75 max 0.11 |
10xC – 1.0 0.6 |
Typical Weld Metal Mechanical Properties
| Tensile Strength: | 88,000 psi | 607 MPa |
| Yield Strength: | 58,000 psi | 400 MPa |
| Elongation (min.): | 40% |
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 – 175 | 100% Ar | |
| MIG (GMAW) | .035” (0.9 mm) | 28 – 32 | 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 |