Description: AFM 2% Ceriated electrodes are tungsten electrodes containing about two percent cerium oxide, referred to as ceria. The 2% Ceriated electrodes were first introduced into the US market in 1987. Several other grades of this type electrode are commercially practical, including electrodes containing one percent CeO, but only one grade, EWCe-2, has been incorporated in this specification as having commercial significance.
The advantages of tungsten electrodes containing ceria, compared to pure tungsten, include increased ease of starting, improved arc stability and reduced rate of vaporization or burn-off. Unlike thoria, ceria is not a radioactive material. These advantages increase with increased ceria content. These electrodes operate successfully with alternating current or direct current, either polarity. Tip color is orange.
Chemical Composition Requirements (%):
- W - 97.3
- CeO2 - 1.8-2.2
- Total Other - 0.5
| Diameter |
Alternating Current
Unbalance Wave
(amps) |
Alternating Current
Balanced Wave
(amps) |
| .040 (1.0) |
15-80 |
20-60 |
| 1/16 (1.6) |
70-150 |
60-120 |
| 3/32 (2.4) |
140-235 |
100-180 |
1/8 (3.2) |
25-325
|
160-250 |
| 5/32 (4.0) |
300-400 |
200-320 |
All values are based on the usage of argon gas.
| Diameter |
DCEN
(DCSP) (amps) |
DCEP
(DCRP) (amps) |
| .040 (1.0) |
15-80 |
Not applicable |
| 1/16 (1.6) |
0-150
|
10-20 |
| 3/32 (2.4) |
150-250 |
15-30 |
| 1/8 (3.2) |
250-400 |
25-40 |
| 5/32 (4.0) |
400-500 |
40-55 |
All values are based on the usage of argon gas.
|
