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.
AWS 化学成分（典型）
| %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 |
典型的焊接金属机械性能
| 抗拉强度 | 90,000 psi | 620 MPa |
| 屈服强度 | 61,000 psi | 420 MPa |
| 伸长 | 38% | - |
Typical Welding Parameters
| 过程 | Diameter | Voltage | Amperage | Gas/Flux |
|---|---|---|---|---|
| 氩弧焊 (GTAW) | 1/16” 1.6 mm | 14 – 18 | 80 – 150 | 100% Ar |
| 氩弧焊 (GTAW) | 3/32” 2.4 mm | 15 – 20 | 150 – 250 | 100% Ar |
| 氩弧焊 (GTAW) | 1/8” 3.2 mm | 16 – 20 | 200 – 375 | 100% Ar |
| 米格 (GMAW) | .035” 0.9 mm | 29 – 33 | 160 – 180 | 98% Ar – 2% O2 |
| 米格 (GMAW) | .045” 1.1 mm | 29 – 33 | 180 – 220 | 98% Ar – 2% O2 |
| 米格 (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 | - |