tungsten electrode composition | Color mark | ||||||||
Grade | Dioxide | Dioxide in % | Impurities % | tungsten % | |||||
WT10 | ThO2 | 0.80-1.20 | ≤0.02 | Remainder | Yellow | ||||
WT20 | ThO2 | 1.70-2.20 | ≤0.02 | Remainder | Red | ||||
WT30 | ThO2 | 2.80-3.20 | ≤0.02 | Remainder | Purple | ||||
WT40 | ThO2 | 3.80-4.20 | ≤0.02 | Remainder | Orange | ||||
WC20 | CeO2 | 1.80-2.20 | ≤0.02 | Remainder | Grey | ||||
WL10 | La2o3 | 0.90-1.20 | ≤0.02 | Remainder | Black | ||||
WL15 | La2o3 | 1.40-1.60 | ≤0.02 | Remainder | Gold | ||||
WL20 | La2o3 | 1.90-2.10 | ≤0.02 | Remainder | Blue | ||||
WZr3 | ZrO2 | 0.15-0.50 | ≤0.02 | Remainder | Brown | ||||
WZr8 | ZrO2 | 0.70-0.90 | ≤0.02 | Remainder | White | ||||
WP | - | - | ≤0.02 | 99.8 | Green | ||||
WY | YO2 | 1.80-2.20 | ≤0.02 | Remainder | Sky blue | ||||
WS2 | YO2 | 1.80-2.20 | ≤0.02 | Remainder | Turquoise |
Diameter | Diameter tolerance | Length | Length tolerance | Color mark | ||
mm | inch | mm | mm | mm | ||
1 | 1/25 | (+/-)0.01 | 50,75,150,175 | (+/-)1.0 | Yellow | |
1.2 | 6/125 | (+/-)0.01 | 50,75,150,175 | (+/-)1.0 | Red | |
1.6 | 1/16 | (+/-)0.02 | 50,75,150,175 | (+/-)1.0 | Purple | |
2 | 2/25 | (+/-)0.02 | 50,75,150,175 | (+/-)1.0 | Orange | |
2.4 | 3/32 | (+/-)0.02 | 50,75,150,175 | (+/-)1.0 | Grey | |
3 | 3/25 | (+/-)0.03 | 50,75,150,175 | (+/-)1.0 | Black | |
3.2 | 1/8 | (+/-)0.04 | 50,75,150,175 | (+/-)1.0 | Gold | |
4 | 5/32 | (+/-)0.04 | 50,75,150,175 | (+/-)1.0 | Blue | |
4.8 | 3/16 | (+/-)0.04 | 50,75,150,175 | (+/-)1.0 | Brown | |
5 | 1/5 | (+/-)0.04 | 50,75,150,175 | (+/-)1.0 | White | |
6 | 15/64 | (+/-)0.04 | 50,75,150,175 | (+/-)1.0 | Green | |
6.4 | 1/4 | (+/-)0.04 | 50,75,150,175 | (+/-)1.0 | Sky blue | |
8 | 5/16 | (+/-)0.04 | 50,75,150,175 | (+/-)1.0 | Turquoise | |
10 | 2/5 | (+/-)0.04 | 50,75,150,175 | (+/-)1.0 |