ASTM C623 is the standard test method for measuring Young's modulus, shear modulus, and Poisson's ratio in glass and glass-ceramics by resonance. It is used to characterize key elastic properties that help define how these materials respond to stress and vibration. This makes the standard valuable for material evaluation, quality control, and comparison of test results across laboratories and product types where consistent mechanical property data is needed.

What is ASTM C623?

ASTM C623 provides a resonance-based test method for determining elastic constants in glass and glass-ceramics. Its technical focus is on measuring Young's modulus, shear modulus, and Poisson's ratio from the material's resonant behavior rather than from a static loading approach. As an ASTM standard, it supports repeatable testing and a common reference for reporting mechanical properties. For buyers and technical teams, ASTM C623 helps identify a recognized method for evaluating these brittle materials.

Where is ASTM C623 used?

This standard is commonly used in laboratories and technical environments that test glass and glass-ceramic materials. It is relevant where elastic property data is needed for product development, material qualification, or incoming inspection. Because the method relies on resonance, it is suited to setups that can excite and measure vibrational response with appropriate test equipment. ASTM C623 is often used when consistent property measurements are needed to compare different material batches or formulations.

Why is ASTM C623 important?

ASTM C623 matters because it gives users a recognized way to measure important mechanical properties with better consistency and comparability. For procurement, testing, and quality control, that helps reduce uncertainty when evaluating glass and glass-ceramics. The standard also supports clearer communication between suppliers and customers by providing a shared test framework. Using ASTM C623 can improve confidence in reported modulus and Poisson's ratio values for engineering and product assessment.

• Resonance-based elastic property testing
• Glass and glass-ceramic materials
• Young's modulus, shear modulus, and Poisson's ratio
• Laboratory evaluation and quality control
• Consistent test reporting for material comparison