GEN 312 Overview
GEN 312 is used to weld cast alloys of similar chemical composition. It is also used to weld dissimilar metals
and weld overlays. Its weld deposit contains significant percentage of ferrite in an austenite matrix and thereby highly resistance to weld metal cracks and fissures.
AWS Chemical Composition (Typical)
| %C | %Cr | %Ni | %Mo | %Mn |
|---|---|---|---|---|
|
0.15 max 0.10 |
28.0 – 32.0 30.2 |
8.0 – 10.5 8.9 |
0.75 max 0.17 |
1.0 – 2.5 1.8 |
| %Si | %P | %S | %Cu |
|---|---|---|---|
|
0.30 – 0.65 1.80 |
0.03 max 0.02 |
0.03 max 0.01 |
0.75 max 0.15 |
Typical Weld Metal Mechanical Properties
| Tensile Strength | 105,000 psi | 724 MPa |
| Yield Strength | 75,000 psi | 517 MPa |
| Elongation | 25% |
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 | 125 – 200 | 100% Ar | |
| 1/8” (3.2 mm) | 16 – 20 | 200 – 350 | 100% Ar | |
| MIG (GMAW) | .035” (0.9 mm) | 28 – 32 | 160 – 190 | 98%Ar – 2%O₂ |
| .045” (1.1 mm) | 29 – 33 | 180 – 220 | 98%Ar – 2%O₂ | |
| Sub Arc (SAW) | .093” (2.4 mm) | 28 – 32 | 250 – 450 | |
| .125” (3.2 mm) | 29 – 33 | 300 – 500 |