GEN 55 Overview
GEN 55 is used for TIG and MIG welding of cast iron. This filler metal is extensively employed to overlay cast iron rolls. It is also used to repair castings. The weld metal of GEN 55 is harder than that of GEN 99. However, machining can be accomplished by using carbide tipped tools. A preheat and interpass temperature of 350°F (175°C) minimum is recommended during welding, without which the weld and heat affected zones could develop cracks.
AWS Chemical Composition (Typical)
| %C | %Mn | %Ni | %Cu | %Al |
|---|---|---|---|---|
|
2.0 max. 0.635 |
2.5 max. 0.44 |
45 – 60 55.2 |
2.5 max. 0.60 |
1.0 0.003 |
| %Si | %Fe | %S | Total Others |
|---|---|---|---|
|
4.0 max. 0.14 |
Rem. 42.89 |
0.03 max. 0.002 |
1.0 max. |
Typical Weld Metal Mechanical Properties
| Tensile Strength | 84,000 psi | 579 MPa |
| Yield Strength | 59,500 psi | 410 MPa |
| Elongation | 30% |
Typical Welding Parameters
| Process | Diameter | Voltage | Amperage | Gas/Flux |
|---|---|---|---|---|
| TIG (GTAW) | 1/16” (1.6 mm) | 14 – 18 | 90 – 130 | 100% Ar |
| 3/32” (2.4 mm) | 15 – 20 | 120 – 175 | 100% Ar | |
| 1/8” (3.2 mm) | 15 – 20 | 150 – 220 | 100% Ar | |
| MIG (GMAW) | .035” (0.9 mm) | 26 – 30 | 160 – 190 | 75% Ar – 25% He |
| .045” (1.1 mm) | 28 – 32 | 180 – 220 | 75% Ar – 25% He |