A copper coated, low alloyed, chromium-molybdenum (2,5% Cr, 1,0% Mo) rod for GTAW of creep resistant steels of the same type, such as pipes in pressure vessels and boilers. The rod can also be used for welding low-alloyed high strength steels with a minimum yield strength less than 400 Mpa. For service temperatures up to 600°C. Similar to AWS A5.28 ER80S-B2.