This electrodes are popular due to the relative ease of striking an arc and lower amperage required. They perform exceptionally well in both AC & DC applications and are a popular general use electrode. Blue electrodes are effective for welding aluminium, magnesium, nickel, copper, titanium, low-alloyed steels, and non-corroding steels.
Composition: 98% tungsten and 2% lanthanum oxide.
| Diameter | Catalog No. |
| 1,6mm | SR.320 |
| 2,0mm | SR.321 |
| 2,4mm | SR.322 |
| 3,2mm | SR.323 |