Tungsten Copper Resistance Welding
The high physical and mechanical properties, as well as the thermal and electrical conductivity, of refractory metal composites make tungsten copper alloy very suitable for die inserts and electrode facings, flash and butt welding dies, and hot upsetting. They can also solve heat balance problems.
Tungsten Electrodes for TIG welding
Tungsten copper resistance welding are available in thoriated, lanthanated, ceriated, and a few other varieties.
| Type | Brand | Color | Chemical Composition（％） | Sizes (mm) | Surface | Features | ||
| Rare Earth | Impurities | W | ||||||
| Pure Tungsten |
WP | Green | － | ≤0.05 | the rest | 0.8~15 | D,E G,S |
Non-radioactive;suitable for AC welding of aluminum, magnesium, and their alloy |
| Thoriated Tungsten | WTh10 | Yellow | 0.9~1.1ThO2 | ≤0.05 | the rest | 0.8~15 | D,E G,S |
Excellent electron emission and overall performances; high current-carrying capacity; radioactivity; suitable for DC welding of carbon steel, stainless steel,nickel alloy and titanium alloy. |
| WTh20 | Red | 1.8~2.2ThO2 | ≤0.05 | the rest | 0.8~15 | |||
| Lanthanum Tungsten | WLa10 | Black | 0.8~1.2La2O3 | ≤0.05 | the rest | 0.8~15 | D,E G,S | Non-radioactive;excellent electric conductivity and welding capacity; high current-carrying capacity; minimum ratio of burnt area; substitute for thoriated tungsten electrode; mainly used in DC welding. |
| WLa15 | Golden Yellow | 1.3~1.7 La2O3 | ≤0.05 | the rest | 0.8~15 | |||
| WLa20 | Blue | 1.8~2.2 La2O3 | ≤0.05 | the rest | 0.8~15 | |||
| Cerium Tungsten | WCe10 | Pink | 0.8~1.2CeO2 | ≤0.05 | the rest | 0.8~15 | D,E G,S | Non-radioactive;easier arc initiation under low current circumstances, and low arc-maintaining current;suitable for the welding of pipelines,small components and discontinuous welding. |
| WCe15 | Orange | 1.3~1.7CeO2 | ≤0.05 | the rest | 0.8~15 | |||
| WCe20 | Grey | 1.8~2.2CeO2 | ≤0.05 | the rest | 0.8~15 | |||
| Yttrium Tungsten |
WY20 | Sky Blue | 1.8~2.2Y2O3 | ≤0.05 | the rest | 0.8~15 | D,E G,S |
Non-radioactive;long and slim arc beam with high compression; deeper burning groove under medium and high current circumstances. |
| Compound Rare Earth Tungsten | WMX | Cyan | 1.0~5.0MOx | ≤0.05 | the rest | 0.8~15 | D,E G,S | Compound rare-earth tungsten electrode; different additives contributing to better performance of tungsten electrode |
Note:D—As Drawn E—Electrolytic Polished G—Ground S—Swaged
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