Putting the WL15 to the test.

We put our WL15 electrode in the ring to go head-to-head with our classic WT20. The referee: The independent German Federal Institute for Materials Research and Testing (BAM). Read on to find out who won.

Ignites fast. Stays in shape for longer.

WL15 welding electrode

The BAM examined the ignition characteristics of the WT20 and the thorium-free WL15 welding electrodes. Both electrode types were tested on thin sheets made from non-alloyed high-grade steel (DC01) as well as on high-alloy steel (X5CrNi18-10).
Continuous ignition tests were performed with an ignition current Iign = 80 A and an ignition gap Dign = 2 mm. The tip of the electrode was ground to a tip with a 40 degree angle.

A comparison of the voltage-time curves for the DC 01 material showed that arc ignition times for electrodes of the type WL15 were lower than those measured for the WT 20. In the case of X5CrNi18-10, the ignition characteristics and voltage curves of the two electrode types were similar.

There was a considerable difference in the external appearance of the TIG electrodes after the continuous ignition tests. Electrodes of the type WT20 showed a greater tendency towards oxidation and more extensive signs of wear than the WL15 electrodes. What consequences this might have for the long-term durability of the electrodes will have to be examined separately in continuous welding tests.

Download the test report now.

Would you like to see all the details? Read the BAM's original test report.

Visit our online shop!

Read more about our tungsten welding electrodes or purchase the WL15 electrode straight away in our online shop.