MMA electrode with rutile type flux made on special cobalt alloy core wire. Electrode coating is designed to give sound porosity-free deposits coupled with smooth operation and low dilution. Recovery is about 110% with respect to the core wire, and 65% with respect to the whole electrode.
This is the most widely used cobalt base type and combines good abrasion resistance with resistance to corrosion, erosion and thermal shock. It also has excellent resistance to galling, sliding friction and compression at all temperatures. It is used to surface valves and valve seats, hot shear blades, punches and dies, ingot tong ends and equipment for handling hot steel. Used for cat cracker slide valves in the petrochemical industry. Also finds applications in a very wide range of industries including steel, cement, marine and power generation.
Specification
AWS A5.13: ECoCr-A
DIN 8555: E20-UM-45-CTZ
BS EN 14700: (E Co2 nearest)