ASTM E289

ASTM E289 is the ASTM standard for measuring the linear thermal expansion of rigid solids with interferometry. It provides a technical framework for evaluating how a solid material changes in length as temperature changes, which can be important for design, material selection, and quality control. By focusing on interferometric measurement, the standard supports precise, repeatable testing for applications where dimensional stability matters.

What is ASTM E289?

ASTM E289, Standard Test Method for Linear Thermal Expansion of Rigid Solids with Interferometry, is a test method used to determine the thermal expansion behavior of rigid solids through interferometric measurement. The standard is centered on measuring small dimensional changes with high sensitivity, making it useful when accurate expansion data is needed for technical evaluation. As an ASTM standard, it helps define a consistent approach to testing so results can be compared more reliably across materials, laboratories, and product evaluations.

Where is ASTM E289 used?

This standard is commonly used in laboratory testing, materials characterization, and engineering workflows that need precise thermal expansion data for rigid solid specimens. It may be applied during product development, specification verification, or incoming material assessment when dimensional stability under temperature change is a concern. ASTM E289 is especially relevant wherever interferometric measurement equipment is used to track very small length changes in solid materials under controlled test conditions.

Why is ASTM E289 important?

ASTM E289 matters because thermal expansion data can affect fit, function, and reliability in many technical applications. Using a recognized standard supports more consistent testing practices, which can improve comparison between suppliers, help with procurement decisions, and reduce uncertainty in material performance evaluation. It also assists quality control teams and engineering groups that need dependable, repeatable results when assessing rigid solids for temperature-related dimensional behavior.

• Linear thermal expansion measurement
• Interferometric test method
• Rigid solid materials
• Controlled laboratory evaluation
• Consistency for engineering and quality control