The test requires a specific impact tester, often referred to as a Gardner Impact Tester. The apparatus consists of the following primary components:
A 10x magnifier is used to inspect the impacted dome for hairline fractures.
The standard covers two distinct types of impact deformations:
A: Usually, no. Unless your customer specifically writes "ASTM D2794-93 (R2019)" into the contract, you must use the latest revision. Always check the ASTM website for "Redline" changes between versions.
The principles of ASTM D2794 are applied across many industries to ensure product longevity and safety. astm d2794 pdf
The setup consists of:
| Standard | Key Difference | Best For | | :--- | :--- | :--- | | | Hemispherical indenter; coating on metal. | General industrial paint/powder. | | ISO 6272 | The international equivalent (similar but not identical load masses). | Global trade (Europe/Asia). | | ASTM G14 | Specific to pipeline coatings; uses a different dart shape. | Oil & gas pipe wraps. | | ASTM D5420 | (Gardner Impact) For plastic substrates, not metal. | Plastic car bumpers. |
The test is conducted using a falling-weight impact tester, which includes a hemispherical indenter (the striking surface), a standard weight, and a mechanism to drop the weight from a controlled height. The key steps are as follows:
Remove the panel and inspect the impacted area for cracking or peeling. The test requires a specific impact tester, often
One of the most widely accepted methods for evaluating a coating's ability to resist cracking or peeling under sudden stress is . This comprehensive guide explores the significance of the ASTM D2794 standard, the testing equipment required, the step-by-step procedure, and how to interpret the results. What is ASTM D2794?
Impact Energy=Weight (lbs)×Height (inches)Impact Energy equals Weight (lbs) cross Height (inches)
Inch-pounds (in-lb) or Centimeter-kilograms (cm-kg) / Joules (J) 10x Magnifier, Copper Sulfate solution, Adhesion tape Conclusion
Here is a guide to help you find official sources and navigate vendor ratings: The setup consists of: | Standard | Key
When searching for the "ASTM D2794 PDF," it is important to be aware of copyright. ASTM International holds the copyright for all its standards, and they are not legally available for free public distribution. Therefore, it is necessary to purchase an official copy from authorized resellers.
Paint chemists reference the standard while adjusting resin types, plasticizers, and pigment volume concentrations (PVC) to improve flexibility. How to Access the Official PDF
Whether in automotive manufacturing, marine engineering, or construction, ASTM D2794 helps ensure that protective and decorative finishes meet the demands of the environments they serve. For professionals committed to quality and performance, obtaining the official ASTM D2794 PDF is an investment in ensuring that their products are built to last.
Understanding ASTM D2794: The Standard Test for Impact Resistance of Organic Coatings
A sturdy vertical frame featuring a guide tube graduated in inches or centimeters to measure drop height accurately.
The results of the ASTM D2794 test are typically reported as the maximum height from which the indenter can be dropped without causing damage to the coating. The test can be performed with different types of indenters, and the results may vary depending on the indenter used.