MMA electrode – 1¼Cr-½Mo deposit with low carbon which produces lower hardness and residual stresses for resistance to sulphide stress corrosion cracking when operating in wet ‘sour’ environments.
Also suitable for thin section joints which are to be left in the as-welded condition.
Basic flux, metal powder type coatings on low carbon high purity core wire.
Recovery is approximately 115% with respect to the core wire and 65% with respect to whole electrode.
Moisture resistant coating gives very low metal hydrogen levels.