AWS A5.13 ECoCr-E

Cobalt 21

ECoCr-E electrodes have very good strength and ductility in temperatures up to 1600°F (871°C). Deposits are resistant to thermal shock, oxidizing, and reducing atmospheres. Early applications of these types of alloys were found in jet engine components such as turbine blades and vanes.

The deposit is a solid solution straightened alloy with a relatively low weight-percent carbide phase in the microstructure. Hence, the alloy is very tough and will work harden. Deposits possess excellent self-mated galling resistance and also are very resistant to cavitation erosion.

ECoCr-E electrodes are used where the resistance to thermal shock is important. Typical applications; similar to those of deposits made using ECoCr-A (Cobalt 6) electrodes; guide rolls, hot extrusion and forging dies, hot shear blades, tong bits, valve trim.