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Pure Tungsten Electrodes
1、Pure Tungsten Electrodes Characteristics
1)Pure Tungsten Electrodes, the least expensive of all tungsten, is generally used in the AC welding of aluminum and magnesium alloys.
2)Yttriated Tungsten is primarily used in military and aviation industry with narrow arc beam,high compressing strength,highest welding penetration at medium and high current.
3)The performances of Composite Electrodes in welding can be much improved by adding two or more rare earth oxides which are mutually completementary.
| Type of Electrode | Designation | Oxide Additive | Impurities Content | Tungsten Content | Color Sign | |
| Category | Content % | |||||
| Pure Tungsten | WP | -- | -- | <0.20 | Balance | Green |
| Yttriated Tungsten | WY20 | Y2O3 | 1.8-2.2 | <0.20 | Balance | Blue |
| Composite | -- | -- | 1.5-3.0 | <0.20 | Balance | -- |
2、Product Standard
ISO 6848 ANSI/AWS A5.12/A5.12M-98
3、Size
1)Diameter:? 0.5-25mm2)Length:?? 150mm, 175mm, 178mm,? any other length at customer request.
4、Recommended Tungsten Electrodes for Various Welding Currents
| Diamter of Electrode | DC(A) | AC(A) | |||
| In | Mm | Straight Polarity(-) | Reverse Polarity(+) | Unbalanced Waves | Balanced Waves |
| 0.04" | 1.0 | 15-80 | ? | 10-80 | 20-60 |
| 1/16" | 1.6 | 60-150 | 10-18 | 50-120 | 40-100 |
| 0.079" | 2.0 | 100-200 | 12-20 | 70-160 | 60-130 |
| 3/32" | 2.4 | 150-250 | 15-25 | 80-200 | 80-150 |
| 1/8" | 3.2 | 220-350 | 20-35 | 150-270 | 120-200 |
| 5/32" | 4.0 | 350-500 | 35-50 | 220-350 | 170-260 |
| 3/16" | 4.8 | 420-650 | 45-65 | 240-420 | 220-340 |
| 1/4" | 6.4 | 600-900 | 65-100 | 360-560 | 250-450 |
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