What is the core performance index that defines high-temperature alloy quality?

Creep rupture strength acts as the decisive indicator, measuring how long the material bears fixed load without fracture at constant high temperature. Secondary indexes include high-temperature yield strength, thermal fatigue resistance, continuous oxidation weight loss rate and hot corrosion resistance in sulfur or alkali vapor environments. All indexes must meet aviation or energy industry unified standards to ensure long-term safe operation of hot-end core parts.