China Wth7 Series Thoriated Tungsten Wires for TIG Welding, Find details about China Thoriated Tungsten Wires, Tungsten Electrode from Wth7 Series Thoriated Tungsten Wires for TIG Welding
| (Diameter allowed tolerance of the wire )mm (diameter) | 200mmm (tolerance of wire weight) | (diameter allowed tolerance) | ||
(first -grade) | (second-grade) | (first -grade) | (second-grade) | |
| ø 0.2-ø 0.35 | ±1.5 | ±2.0 | ||
| > ø 0.35-ø 0.80 | ------- | ------ | ±1.0 | ±2.0 |
| chemical composition model | W% | Oxide% | Impurity% | intermingled material content |
| WTh7 | 98.90 | 0.70-0.99 | <0.01 | <0.01 |
| WTh10 | 98.41 | 1.00-1.49 | <0.01 | <0.01 |
| WTh15 | 97.91 | 1.50-1.99 | <0.01 | <0.01 |
| WTh20 | 97.64 | 1.99-2.50 | <0.01 | <0.01 |