GEN 309L Overview
GEN 309L is used to weld base metals of similar chemical composition in wrought or cast form. It is also suitable for joining dissimilar metals such as 18Cr‐8Ni stainless steel to mild steel. The low carbon content minimizes the possibility of carbide precipitation. GEN 309L is preferred over 309 for cladding over carbon or low alloy steels, as well as for dissimilar joints that undergo heat treatment.
AWS 化学成分（典型）
| %C | %Cr | %Ni | %Mo | %Mn |
|---|---|---|---|---|
| 0.03 max 0.015 |
23.0 – 25.0 23.4 |
12.0 – 14.0 13.6 |
0.75 max 0.08 |
1.0 – 2.5 1.65 |
| %Si | %P | %S | %Cu |
|---|---|---|---|
| 0.30 – 0.65 0.04 |
0.03 max 0.02 |
0.03 max 0.01 |
0.75 max 0.06 |
典型的焊接金属机械性能
| 抗拉强度 | 87,000 psi | 600 MPa |
| 屈服强度 | 59,000 psi | 406 MPa |
| 伸长 | 35% |
Typical Welding Parameters
| 过程 | Diameter | Voltage | Amperage | Gas/Flux |
|---|---|---|---|---|
| 氩弧焊 (GTAW) | 1/16” (1.6 mm) | 14 – 18 | 90 – 130 | 100% Ar |
| 氩弧焊 (GTAW) | 3/32” (2.4 mm) | 15 – 20 | 120 – 175 | 100% Ar |
| 氩弧焊 (GTAW) | 1/8” (3.2 mm) | 16 – 20 | 150 – 220 | 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 | |
| 米格 (GMAW) | .063” (1.6 mm) | 29 – 33 | 210 – 250 | |
| 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 |