ASTM D5420
Standard Test Method for Impact Resistance of Flat, Rigid Plastic Specimen by Means of a Striker Impacted by a Falling Weight (Gardner Impact)
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About This Item
ASTM D5420 is a technical standard that describes a method for evaluating the impact resistance of flat, rigid plastic specimens using a striker impacted by a falling weight. It is commonly associated with Gardner impact testing and helps users assess how a material responds to sudden force. For product development, quality control, and comparison testing, this standard provides a consistent framework for measuring impact performance in a controlled way.
What is ASTM D5420?
ASTM D5420, titled Standard Test Method for Impact Resistance of Flat, Rigid Plastic Specimen by Means of a Striker Impacted by a Falling Weight (Gardner Impact), defines a test approach for examining how flat rigid plastic specimens withstand impact. The method uses a falling weight to strike a specimen through a striker, which makes it useful for comparing relative resistance to impact damage. As an ASTM standard, it supports repeatable testing practices and more consistent technical evaluation.
Where is ASTM D5420 used?
This standard is commonly used in laboratories, quality assurance programs, and material evaluation workflows where flat rigid plastic specimens need impact testing. It is relevant when assessing plastics intended for manufactured parts, sheet goods, or other rigid plastic products that may be exposed to sudden mechanical force. ASTM D5420 is also useful in procurement and product verification settings where buyers and suppliers need a shared test method for comparing performance.
Why is ASTM D5420 important?
ASTM D5420 helps create a consistent basis for impact resistance testing, which can reduce variation in material evaluation and improve confidence in results. By using a defined falling-weight striker method, organizations can better compare specimens, support compliance activities, and make more informed decisions during development or acceptance testing. For manufacturers and purchasers, the standard can also help manage risk by providing a clearer view of how rigid plastic materials respond to impact.
- Gardner impact test method
- Flat, rigid plastic specimens
- Falling weight striker evaluation
- Comparative impact resistance testing
- Quality control and material verification
- Publication Date: 2021-02-10
- Publisher: ASTM
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