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曲线的峰相当于图4-7-1曲线的拐点,作为表示低温下使用界限的一个大致标准。c.硬度的结晶效应测定JIS中没有制定,但通过测定低温长时间下硬度的增加,评价结晶效应的试验方法,在以下的ISO标准中做了规定。
The peak of the curve corresponds to the inflection point of the curve in Figure 4-7-1 as a rough guideline for indicating the limits of use at low temperatures. c. Measurement of Crystallization Effect of Hardness Although not defined in JIS, the test method for evaluating the effect of crystallization by measuring the increase in hardness at a low temperature for a long period of time is defined in the following ISO standards.