Degree of normality

Quality characteristics for GJL which, according to Eq. 1, is the relation of the achieved tensile strength (proven with a 30mm standard test bar) and the tensile strength calculated from the degree of saturation Sc:


Eq. 1:



A low degree of normality is a sign that the metallurgic possibilities have not been used entirely for the production conditions. The goal from a metallurgic point of view is to achieve a high degree of normality since this correlates with low relative hardness (q. v.) and thus allows for good processing for standard pearlitic flake graphite cast iron.

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