1.1本规程涵盖了基于每个合金相的成分和晶体结构的所有合金相的名称分配。 1.2本惯例允许为每个阶段选择唯一的名称，但在某些情况下，如3.4和3.5所述，使用任意小写字母。 1.3给定相位应使用相同的名称，无论其出现在何种系统中（单组分、二元、三元或多元）。 1.4还提供了选择临时指定的程序，以涵盖没有足够信息来指定永久指定的情况。

1.1 This practice covers the assignment of designations for all alloy phases, based on the composition and crystal structure of each. 1.2 The practice makes possible the selection of a unique designation for each phase, except that in some cases an arbitrary lower case letter is used as described in 3.4 and 3.5. 1.3 The same designation shall be used for a given phase regardless of the system in which it appears (single component, binary, ternary, or polynary). 1.4 A procedure for selecting a temporary designation is also provided to cover those cases in which not enough information is available to assign the permanent designation.