ISO 5940:1981 制铝用碳质材料.电极用沥青.用环和球法测定软化点

标准编号：ISO 5940:1981

中文名称：制铝用碳质材料.电极用沥青.用环和球法测定软化点

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

发布日期：1981-05

标准范围

规定了一种使用圆盘式试样的方法，该试样通过将试样模制在安装在加热槽中的环中来制备。将钢球放置在试样的上表面上。然后确定温度（软化温度），在该温度下，试样在以规定速率加热时充分软化，以下垂至球质量下的规定深度。拟使用温度计的详细信息和沥青样品的熔化信息包含在两个附件中。

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.

标准预览图