Description: AFM Pure Tungsten electrodes are unalloyed tungsten electrodes (99.5% tungsten minimum). Their current-carrying capacity is lower than that of other electrodes. They provide good stability when used with alternating current, either balanced wave or continuously high frequency stabilized. They may be used with direct current and also with either argon or helium, or a combination of both, as a shielding gas. They maintain a clean, balled end, which is preferred for aluminum and magnesium welding.

These electrodes have reasonably good resistance to contamination of the weld metal by the electrode, although the oxide containing electrodes are superior in this respect. Pure tungsten electrodes are generally used on less critical applications, except for welding aluminum and magnesium. The lower cost pure tungsten electrodes can be used for less critical applications where some tungsten contamination of welds is acceptable. Tip color is green.

Chemical Composition Requirements (%):

• W Min. 99.5
• Total Other - 0.5

Typical Current Ranges:

All values are based on the usage of argon gas.