GEN 308 filler metal is the most popular grade among stainless steels, used for general-purpose applications where corrosion conditions are moderate.
GEN 308 Overview
GEN 308 is used for welding a wide variety of unstabilized stainless steels such as type 301, 302, 304, 305 and 308. GEN 308 meets chemical requirements of both ER308 and ER308H. The higher carbon content, between .04% and .08%, in ER308H provide higher tensile and creep strength at elevated temperature.
Composición química de AWS (típica)
| %C | %Cr | %Ni | %Mo | %Mn |
|---|---|---|---|---|
| 0.04 – 0.08 0.05 |
19.5 – 22.0 20.1 |
9.0 – 11.0 9.7 |
0.50 max 0.08 |
1.0 – 2.5 1.8 |
| %Si | %P | %S | %Cu |
|---|---|---|---|
| 0.30 – 0.65 0.43 |
0.03 max 0.02 |
0.03 max 0.01 |
0.75 max 0.11 |
Propiedades mecánicas típicas del metal de soldadura
| Fuerza de Tensión | 90,000 psi | 620 MPa |
| Límite elástico | 61,000 psi | 420 MPa |
| Alargamiento | 38% | – |
Typical Welding Parameters
| Proceso | Diameter | Voltage | Amperage | Gas/Flux |
|---|---|---|---|---|
| TIG (GTAW) | 1/16” 1.6 mm | 14 – 18 | 80 – 150 | 100% Ar |
| TIG (GTAW) | 3/32” 2.4 mm | 15 – 20 | 150 – 250 | 100% Ar |
| TIG (GTAW) | 1/8” 3.2 mm | 16 – 20 | 200 – 375 | 100% Ar |
| MIG (GMAW) | .035” 0.9 mm | 29 – 33 | 160 – 180 | 98% Ar – 2% O2 |
| MIG (GMAW) | .045” 1.1 mm | 29 – 33 | 180 – 220 | 98% Ar – 2% O2 |
| MIG (GMAW) | .063” 1.6 mm | 29 – 33 | 210 – 250 | 98% Ar – 2% O2 |
| Sub Arc (SAW) | .093” 2.4 mm | 29 – 32 | 300 – 350 | – |
| Sub Arc (SAW) | .125” 3.2 mm | 29 – 32 | 400 – 550 | – |
| Sub Arc (SAW) | .156” 4.0 mm | 29 – 32 | 500 – 650 | – |