Carbonaceous materials for the production of aluminium. Pitch for electrodes - Determination of softening point by the ring-and-ball method1 Scope This document specifies the ring and ball method, a method of using the ring and ball apparatus for the determination of the softening point (softening temperature) of pitch used in the production of aluminium. The method is applicable to pitches having softening points equal to or greater than 30 C.

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EN ISO 20347

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