A popular European grade, GEN 307 is used for automotive exhaust applications and dissimilar stainless grades.
GEN 307 Overview
GEN 307 is similar to ER307 with an increased manganese content, reducing the risk of fissuring/hot cracking
that can otherwise be a problem in fully austenitic weld metals. It is used primarily for moderate-strength welds with good crack resistance between dissimilar steels such as austenitic manganese steel and carbon steel forgings and castings. It may also be used as a buffer layer under hard facing alloys.
Composición química de AWS (típica)
| %C | %Cr | %Ni | %Mo | %Mn |
|---|---|---|---|---|
| 0.20 max | 17.0 – 20.0 | 7.0 – 10.0 | 0.5 max | 5.0 – 8.0 |
| %Si | %P | %S | %Cu |
|---|---|---|---|
| 1.2 max | 0.03 max | 0.03 max | 0.50 max |
Propiedades mecánicas típicas del metal de soldadura
| Fuerza de Tensión | 94,000 psi (650 MPa) |
| Límite elástico | 67,000 psi (460 MPa) |
| Alargamiento | 40% |
Typical Welding Parameters
| Proceso | Diameter | Voltage | Amperage | Gas/Flux |
|---|---|---|---|---|
| TIG (GTAW) | 1/16” (1.6 mm) | 14 – 18 | 90 – 140 | 100% Ar |
| 3/32” (2.4 mm) | 15 – 20 | 120 – 180 | 100% Ar | |
| 1/8” (3.2 mm) | 16 – 20 | 150 – 220 | 100% Ar | |
| MIG (GMAW) | .035” (0.9 mm) | 26 – 31 | 150 – 230 | 98% Ar – 2% O2 |
| .045” (1.1 mm) | 28 – 33 | 180 – 280 | 98% Ar – 2% O2 | |
| Sub Arc (SAW) | .093” (2.4 mm) | 28 – 31 | 280 – 350 | |
| .125” (3.2 mm) | 29 – 33 | 340 – 450 |