Quality Index (QT) Calculator
The Quality Index (QT) is a method developed by Murat Tiryakioğlu and collaborators to relate tensile properties to the achievable performance of a given alloy. Rather than assessing strength or elongation in isolation, QT provides a normalized measure of how efficiently a casting process converts alloy capability into real performance.
This calculator is based on the published QT framework and is intended as a practical tool to assess casting process performance.
Most castings operate well below their achievable potential. This tool shows you where you actually are.
QT Calculator
Enter yield strength and elongation to see how your process compares to the achievable performance of the alloy. Submitted values are stored anonymously for aggregate benchmarking. The calculator does not create a user account or store personal project history.
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Further Reading (QT Methodology)
This calculator is based on the published work of Murat Tiryakioğlu and collaborators. The papers below outline the development of the Quality Index (QT) and its application to casting quality assessment and form the basis of the approach used here.
Quality Indices for Aluminum Alloy Castings: A Critical Review, 2009 – Tiryakioğlu et al.
Ductility, structural quality, and fracture toughness of Al-Cu-Mg-Ag (A201) alloy castings, 2009 – Tiryakioğlu et al.
On the ductility potential of cast Al-Cu-Mg (206) alloys, 2009 – Tiryakioğlu et al.
On the Ductility of Cast Al7 Pct Si-Mg Alloys, 2009 – Tiryakioğlu et al.
On the ductility potential and assessment of structural quality in Mg alloy castings, 2015 – Űnal et al.
Quality Index for Aluminum Alloy Castings, 2015 – Tiryakioğlu et al.
Ductility Potential and Quality Index for Aluminum Alloy Castings: An Update, 2026 – Tiryakioğlu et al.