ASTM D746

ASTM D746 is the ASTM standard for the Standard Test Method for Brittleness Temperature of Plastics and Elastomers by Impact. It provides a technical framework for evaluating how these materials behave at low temperatures when exposed to impact, helping users understand when a material may become brittle. That information is important for material selection, product qualification, and quality control where cold-weather performance or impact resistance matters.

What is ASTM D746?

ASTM D746 defines a test method used to determine the brittleness temperature of plastics and elastomers by impact. In practical terms, it helps indicate the temperature at which a material may lose toughness and become more likely to crack or fail under sudden force. As an ASTM standard, it supports consistent testing and more reliable comparison of material behavior across products, batches, or suppliers. ASTM D746 is commonly used as a technical reference when low-temperature performance is part of the specification or purchase requirement.

Where is ASTM D746 used?

This standard is used in testing environments where plastics and elastomers must be evaluated for brittleness under impact at lower temperatures. It is relevant in product development, incoming material checks, and quality assurance workflows that depend on consistent low-temperature performance data. ASTM D746 is often applied when selecting materials for parts, components, or assemblies that may be exposed to cold service conditions and where impact-related failure could affect reliability.

Why is ASTM D746 important?

ASTM D746 is important because it gives manufacturers, buyers, and test labs a recognized method for assessing brittle behavior in plastics and elastomers. Using a standard method helps improve consistency in testing, supports product evaluation, and reduces uncertainty during specification review or procurement. It also aids compliance efforts by giving stakeholders a common basis for comparing materials and verifying whether a product may meet expected performance limits under impact.

• Brittleness temperature by impact
• Plastics and elastomers evaluation
• Low-temperature performance screening
• Quality control and material comparison
• Standardized test method reference