ASTM C1351M Glass Viscosity Testing by Viscous Compression
ASTM C1351 measures the viscosity of glass from 104 Pa·s to 108 Pa·s by determining the rate of viscous compression of a little, solid cylinder. The values in SI units are to be considered as standard.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Overview
ASTM C1351M specifies a test method for determining the viscosity of glass using the viscous compression technique under controlled high-temperature conditions. The method evaluates the deformation of a glass specimen subjected to a compressive load, providing accurate viscosity measurements.
This standard is widely used in glass manufacturing and research industries where understanding viscosity is critical for forming, shaping, and processing operations. ASTM C1351M ensures reliable and repeatable data, supporting process optimization, quality control, and material development.
Scope, Applications, and Benefits
Scope
ASTM C1351M covers the determination of glass viscosity by measuring deformation under compressive stress at elevated temperatures. It includes procedures for specimen preparation, temperature control, and calculation methods for accurate evaluation.
Includes:
- Measurement of viscosity using viscous compression
- Evaluation of deformation under compressive load
- Controlled high-temperature testing conditions
- Specimen preparation and dimensional requirements
- Standardized calculation and reporting
Applications
- Glass manufacturing processes
- Thermal forming and shaping operations
- Research and development of glass materials
- Quality control in production
- Furnace process optimization
- Material characterization
Benefits
- Accurate high-temperature viscosity measurement
- Supports efficient glass forming processes
- Reliable and repeatable testing method
- Provides critical thermal behavior data
- Standardized procedure for consistency
- Enhances product quality control
Test Process
Specimen Preparation
Glass specimen is prepared with precise dimensions suitable for compression testing.
1Controlled Heating
Specimen is heated in a furnace to the desired temperature under controlled conditions.
2Load Application
A compressive load is applied causing viscous deformation over time.
3Deformation Measurement
Deformation is measured and used to calculate viscosity using standard equations.
4Technical Specifications
| Parameter | Details |
|---|---|
| Material Type | Glass materials |
| Measurement Principle | Deformation under compressive stress |
| Temperature Range | High-temperature controlled environment |
| Specimen Geometry | Cylindrical or defined shape |
| Loading Type | Constant compressive load |
| Output Parameter | Viscosity in metric units (Pa·s) |
Instrumentation Used for Testing
- High-temperature furnace
- Compression testing apparatus
- Load application system
- Displacement measurement device
- Thermocouples
- Data acquisition system
Results and Deliverables
- Viscosity test report
- Temperature versus viscosity data
- Deformation measurement records
- Test conditions and parameters
- Compliance certification as per ASTM C1351M
- Test summary and evaluation report
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Infinita Lab is built to serve the full spectrum of modern testing needs—across industries, materials, and methodologies. Our advanced equipment and expert professionals deliver highly accurate and prompt test results, helping businesses achieve quality compliance and product reliability.
Looking for a trusted partner to achieve your research goals? Schedule a meeting with us, send us a request, or call us at (888) 878-3090 to learn more about our services and how we can support you. Request a Quote
Frequently Asked Questions
ASTM C1351M is used to determine the viscosity of glass by measuring deformation under compressive load at elevated temperatures, providing essential data for glass forming, processing, and material performance evaluation in industrial and research applications.
What is viscous compression in glass testing?
Viscosity controls how glass flows and deforms during processing, influencing shaping, molding, and final product quality in manufacturing operations.
ASTM C1351M uses compression of a specimen to measure viscosity, while ASTM C1350M uses beam bending, providing alternative approaches for different testing conditions and requirements.
The method requires precise temperature control, careful specimen preparation, and accurate measurement systems, and results may vary depending on material composition and testing conditions.
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