GEN 309LSi Overview
GEN 309LSi has the same chemical composition as GEN 309L with higher silicon content to provide better arc
stability and improve bead appearance. GEN 309LSi is suitable for joining stainless steel type 304, 321 and
347. It is also widely used for cladding over carbon or low alloy steels.
AWS Chemical Composition (Typical)
| %C | %Cr | %Ni | %Mo | %Mn |
|---|---|---|---|---|
| 0.03 max. 0.015 |
0.015 23.3 |
23.0 – 25.0 13.8 |
23.3 0.08 |
12.0 – 14.0 1.9 |
| %Si | %P | %S | %Cu |
|---|---|---|---|
| 0.65 – 1.00 0.83 |
0.03 max. 0.02 |
0.03 max. 0.01 |
0.75 max. 0.06 |
Typical Weld Metal Mechanical Properties
| Tensile Strength: | 87,000 psi | 600 MPa |
| Yield Strength: | 60,000 psi | 413 MPa |
| Elongation: | 35 % |
Typical Welding Parameters
| Process | Diameter | Voltage | Amperage | Gas/Flux |
|---|---|---|---|---|
| TIG (GTAW) | 1/16” (1.6 mm) | 14 – 17 | 90 – 130 | 100% Ar |
| 3/32” (2.4 mm) | 15 – 20 | 120 – 175 | 100% Ar | |
| 1/8” (3.2 mm) | 16 – 20 | 200 – 330 | 100% Ar | |
| MIG (GMAW) | .035” (0.9 mm) | 26 – 31 | 150 – 230 | 98% Ar – 2% O2 |
| .045” (1.1 mm) | 28 – 32 | 180 – 280 | 98% Ar – 2% O2 | |
| Sub Arc (SAW) | .093” (2.4 mm) | 28 – 32 | 300 – 400 | |
| .125” (3.2 mm) | 29 – 32 | 400 – 550 |