Alloy Phase Diagram Database™
APD Login
Recently viewed
This will show the last 5 diagrams you have viewed.

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.

Tips Icon Did you know?
Image Rotator
Ternary Systems. Illustrating equilibrium conditions for three-component (ternary) systems in two dimensions is more complicated than for binary systems. One option is to add a third composition dimension to the base, forming a solid diagram having binary diagrams as its vertical sides (see figure). Here, boundaries of single-phase fields (liquidus, solidus, and solvus lines in the binary diagrams) become surfaces; single- and two-phase areas become volumes; three-phase lines become volumes; and four-phase points, while not shown in the figure, can exist as an invariant plane. While three-dimensional projections can be helpful in understanding the relationships in the diagram, reading values from them is difficult. Ternary systems, therefore, are usually represented by views of the binary diagrams that comprise the faces and two-dimensional projections of the liquidus and solidus surfaces, along with a series of two-dimensional horizontal sections (isotherms) and vertical sections (isopleths) through the solid diagram.

Not a subscriber yet?

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