FactSage 8.4: Thermodynamic Computing Software for Chemical Systems

FactSage 8.4 is a major release of the fully integrated database computing system in chemical thermodynamics, released July 2025 . It features two new databases (FTionx, SGTE2024), new process simulation packages (FactFlow, FactProSim), alloy grade selection, enhanced macro editor, and updated Calphad Optimizer .

Key New Features in Version 8.4

New Databases

• FTionx: FACT Ionic Organics Database with virtual elements for equilibrium constraints

• SGTE(2024): Latest SGTE pure substance database

• Updated Databases: FactPS, FToxid, FTsalt, FTlite, FScopp, FSlead, FSstel, SpMCBN

Process Simulation Add-ons (Free with 8.4)

• FactFlow: Graphical flowsheet simulation for pyrometallurgical processes with stream handling and recycling

• FactProSim: Drag-and-drop flowsheet modeling using Effective Equilibrium Reaction Zone (EERZ) model; Excel integration

Equilib Module Enhancements

• Alloy Grade Selection: Select and define industrial alloy compositions (aluminum, copper, magnesium, etc.) with composition range validation

• Alloy Grade Examples: Aluminum 2024, brass, bronze, casting alloys

Macro Processing

• New Macro Editor: Color-coded commands, functions, and variables; Run macros without exiting editor

FactOptimal Updates

• Simplified Interface: Displays most commonly used features; advanced features under “View” menu

• Fast Calculation Option: Improved calculation speed

Calphad Optimizer 2.1.0

• Reformulated Error Sum: Computes variables directly related to Gibbs energy; smoother parameter space navigation

• Single-Shot Optimizations: Reproducible, effective, less sensitive to starting values

View Data

• Virtual Element Support: Virtual elements Qa, Qb for constraints in equilibrium calculations

• Summary Dropdown: Lists species by virtual element

Additional Updates

• Phase Diagrams: Over 300 stored diagrams added

• Macro Processing: Editor improvements, color-coded commands

• Total Files: Over 20,000 files (was 19,000)