This electrode is of the air hardening type and is highly alloyed. It produces weld metal that cannot be machined and is free from defects such as cracks, porosities, and slag inclusions. The resulting hardness is between 58 and 60 HRC.
It is recommended to use a guide electrode with a limited arc, and when working with materials that are prone to cracking, a buffer-layer of 18/8Mn should be used. Before working with low alloyed, high carbon tool steels, they must be heated to a temperature of 200-400°C, depending on their composition and thickness. After surfacing, it is advisable to let them cool down slowly in still air.
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