ISO 5940-1981 铝生产用碳素材料 电极用沥青 用环和球法测定软化点

标准号：ISO 5940-1981
中文标准名称：铝生产用碳素材料 电*用沥青 用环和球法测定软化点
英文标准名称：Carbonaceous materials for the production of aluminium; Pitch for electrodes; Determination of softening point by the ring-and-ball method
标准类型：Q52;E43
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：Q52;E43
国际标准分类号：71.100.10
适用范围：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.