Product Description
Thorium-Tungsten Electrode WT20
1.Thorium-Tungsten Electrode
| Item Code | Oxide Addictive | Impurities Content% | Tungsten Content% | Color Standard | Standard | |
| Varieties | Content% | |||||
| WT20 | ThO₂ | 1.80-2.20 | <0.2 | Bal. | Red | IS0 6848 AWS A5.12M |
2.Selection of Tungsten Electrode
| Diameter of Electrode | Normal Direct Current |
Opposite Direct Current |
Dissymmetrical Alternating Current |
Symmetrical Alternating Current |
|||
| In inch | mm | WP | WTh | WP | WTh | ||
| 0.020 | 0.5 | 5-20 | — | 5-15 | 5-20 | 10-20 | 5-20 |
| 0.040 | 1.0 | 15-18 | — | 10-60 | 15-80 | 20-30 | 20-60 |
| 0.060 | 1.6 | 70-15 | 10-20 | 50-100 | 70-150 | 30-80 | 60-120 |
| 0.093 | 2.4 | 150-250 | 15-30 | 100-160 | 140-235 | 60-130 | 100-180 |
| 0.125 | 3.2 | 250-400 | 25-40 | 150-210 | 225-325 | 100-180 | 160-250 |
| 0.156 | 4.0 | 400-500 | 40-55 | 200-275 | 300-400 | 160-240 | 200-320 |
| 0.187 | 4.8 | 500-750 | 55-80 | 250-350 | 400-500 | 190-300 | 290-390 |
| 0.250 | 6.4 | 750-1000 | 80-125 | 325-450 | 500-630 | 250-400 | 340-525 |
3.Electrode Type & Polarity Depending On The Welded Material
| 1 best | 2 better | — not recommended | ||
| Material | Electrode Type | DC | AC | |
| Neg. | Pos. | |||
| Alumium(width <2.5mm) | WL15.WP.WZ8 | 2 | 2 | 1 |
| Alumium(width >2.5mm) | WL15.WP.WZ8 | 2 | — | 1 |
| Alumium Alloys | WL15.WP.WZ8 | 2 | — | 1 |
| Magnesium | WP | — | 2 | 1 |
| Magnesium Alloys | WP | — | 2 | — |
| Carbon Steel | WL15.WC20.WT20 | 1 | — | — |
| Stainless Steel | WL15.WC20.WT20 | 1 | — | — |
| Alumium Bronze | WP | 1 | — | 2 |
| Silicon Bronze | WL15.WC20.WT20 | 1 | — | 1 |
| Nickel & Alloys | WP | 2 | — | |
| Copper | WL15.WC20.WT20 | 1 | — | — |
| Bronze | WL15.WC20.WT20 | 1 | — | 2 |
| Titanium | WL15.WC20.WT20 | 1 | — | 2 |
