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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A peritectoid reaction is an isothermal reversible reaction in which two solid phases decompose into a third solid phase upon cooling. An example of a peritectoid transformation is provided by the formation of the intermetallic compound U3Si in uranium-silicon alloys (see figure). Casting uranium at the proper concentration of silicon (3.78 wt%, or 24.98 at.%) results in a mixture of the uranium terminal solid solution and U3Si2.

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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