材料名称应基于化学成分限值。所有材料名称应具有前缀“ISO”。基本元素和主要合金元素的名称应使用国际化学符号，后跟表示金属等级的字母或表示标称合金含量的数字。铸造合金的前缀应为G。

The material designations shall be based on the chemical composition limits. All material designations shall have the prefix "ISO". International chemical symbols shall be used for the designation of the base element and the major alloying elements, followed by letters indicating the metal grade or by numbers indicating the nominal alloy content. Cast alloys shall have the prefix G.