ASTM C1351M is the ASTM standard for measuring the viscosity of glass between 10⁴ Pa·s and 10⁸ Pa·s by viscous compression of a solid right cylinder. It provides a controlled test approach for evaluating glass behavior in a defined high-viscosity range, which is important for materials characterization and consistent technical comparison. As a product-page standard, ASTM C1351M helps buyers identify the correct test method for this specific measurement need.

ASTM C1351M standard overview

The official title of ASTM C1351M indicates a test method focused on viscosity measurement for glass using a viscous compression technique applied to a solid right cylinder. That makes the standard relevant when a laboratory needs a repeatable way to assess glass flow resistance within the stated range. Because the method is defined in metric units, it supports metric-based testing workflows and documentation. ASTM C1351M is therefore a specialized technical document for controlled viscosity evaluation rather than a general-purpose glass standard.

Where is ASTM C1351M used?

ASTM C1351M is commonly used in laboratory and quality-control settings where glass viscosity must be measured under a defined test method. It may be applied during materials development, product evaluation, or compliance-related testing for glass specimens prepared as solid right cylinders. The standard is especially relevant when test results need to be comparable across teams, facilities, or procurement specifications. ASTM C1351M is a practical reference for organizations working with glass characterization and metric test documentation.

Practical importance of ASTM C1351M

This standard matters because it helps reduce ambiguity in viscosity testing for glass by defining a specific measurement method and range. Using ASTM C1351M can support consistent results, clearer purchasing decisions, and more reliable quality control records. It also helps laboratories align testing practices with a recognized ASTM standard, which may improve traceability and internal or external review processes. For technical teams, the method supports more confident evaluation of glass performance and behavior.

• Glass viscosity measurement method
• Defined range: 10⁴ Pa·s to 10⁸ Pa·s
• Viscous compression test on a solid right cylinder
• Metric-format standard for laboratory use
• Useful for quality control and technical comparison