ISO 5940:1981

Carbonaceous materials for the production of aluminium — Pitch for electrodes — Determination of softening point by the ring-and-ball method

Specifies a method using a disc-shped test piece to be prepared by moulding a test portion ina ring which is fitted into a heated bath. A steel ball is placed on the upper surface of the test piece. Then the temperature (softening temperature) is determined at which the test piece, on heating at a prescribed rate, softens sufficiently to sag to a specifeid depth under the mass of the ball. Details on the thermometers to be used and information on the melting of pitch samples are included in two annexes.

OEN:

ISO

Langue:

English

Code(s) de l'ICS:

71.100.10

Statut:

Annulée

Date de Publication:

1981-04-30

Numéro Standard:

ISO 5940:1981