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 化学成分（典型）
| %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 |
典型的焊接金属机械性能
| 抗拉强度: | 88,000 psi | 607 MPa |
| 屈服强度: | 58,000 psi | 400 MPa |
| Elongation (min.): | 40% |
Typical Welding Parameters
| 过程 | Diameter | Voltage | Amperage | Gas/Flux |
|---|---|---|---|---|
| 氩弧焊 (GTAW) | 1/16” (1.6 mm) | 14 – 17 | 90 – 130 | 100% Ar |
| 3/32” (2.4 mm) | 15 – 20 | 120 – 175 | 100% Ar | |
| 米格 (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 |