Grey tungsten is known for its excellent ignition properties, meaning it starts an arc easily even at low amperages. It is a favorite for orbital tube and pipe welding, thin sheet metal work, and delicate parts where precision is key.
| Feature / Material | Compatibility | Why it works |
| DC (Steel/Stainless) | ⭐⭐⭐⭐⭐ (Excellent) | Maintains a sharp point; very stable arc at all power levels. |
| AC (Aluminum/Magnesium) | ⭐⭐⭐⭐⭐ (Excellent) | Handles high current better than Pure tungsten; holds shape well. |
| Arc Starting | ⭐⭐⭐⭐⭐ (Excellent) | Low "work function" allows the arc to jump easily without sticking. |
| Service Life | ⭐⭐⭐⭐ (High) | High resistance to thermal shock and erosion. |
| Inverter Power Sources | ⭐⭐⭐⭐⭐ (Optimal) | Specifically engineered to work with modern high-frequency inverters. |
| Electrode Diameter | DCEN (Direct Current) | AC (Alternating Current) |
Common Applications
|
| .040" (1.0mm) | 15 – 80 Amps | 15 – 60 Amps |
Jewelry, thin sensors, foil
|
| 1/16" (1.6mm) | 70 – 150 Amps | 60 – 120 Amps |
Sheet metal, thin wall tubing
|
| 3/32" (2.4mm) | 150 – 250 Amps | 100 – 180 Amps |
General fabrication, pipe
|
| 1/8" (3.2mm) | 250 – 400 Amps | 160 – 250 Amps |
Heavy plate, large castings
|
