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ASTM E157-88(1994)

Current Revision

Practice for Assigning Crystallographic Phase Designations in Metallic Systems (Withdrawn 1999)

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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.


SDO ASTM: ASTM International
Document Number E157
Publication Date Jan. 1, 1994
Language en - English
Page Count 3
Revision Level 88(1994)
Supercedes
Committee E04.02
Publish Date Document Id Type View
Jan. 1, 1994 E0157-88R94 Revision