Alloy Phase Diagram Database™
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Welcome to Alloy Phase Diagram Database™

The ASM Alloy Phase Diagram Database allows subscribers to explore, search and view more than 36,500 binary and ternary phase diagrams and associated phase data for more than 6200 systems from their Web browsers.

To get started, enter one or more elements in the boxes at the top of the screen and click Go, or select Explore to browse by elements and systems, or select Search to build targeted queries.

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Vertical sections (isopleths) in ternary systems are often taken through one corner (one component) and a congruently melting binary compound that appears on the opposite face; when such a plot can be read like any other true binary diagram, it is called a quasibinary section. One possibility of such a section is illustrated by line 1-2 in the isothermal section shown in the figure. A vertical section between a congruently melting binary compound on one face and one on a different face might also form a quasibinary section (see line 2-3). All other vertical sections are not true binary diagrams, and the term pseudobinary is applied to them. A common pseudobinary section is one where the percentage of one of the components is held constant (the section is parallel to one of the faces), as shown by line 4-5. Another is one where the ratio of two constituents is held constant, and the amount of the third is varied from 0 to 100% (line 1-5).

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To learn how you or your facility can obtain access rights, contact Denise Sirochman at or 440.338.5409

ASM Alloy Phase Diagram Database, P. Villars, editor-in-chief; H. Okamoto and K. Cenzual, section editors.

ASM International, Materials Park, OH, 44073, USA