Astm D2794 Pdf [2021] May 2026

The ASTM D2794 procedure uses a falling-weight apparatus to induce a controlled impact on a coated panel.

The primary goal of this standard is to predict how well a coating will hold up during its service life when hit by tools, debris, or other heavy objects. The test determines:

The specific energy threshold (measured in inch-pounds) where failure first occurs. The Testing Procedure astm d2794 pdf

Organic coatings are applied to at least four thin (typically 24-gauge) metal panels. These samples are cured according to the manufacturer’s specifications.

The panel is placed in the tester, either with the coated side up ( direct impact ) or down ( reverse impact ). The ASTM D2794 procedure uses a falling-weight apparatus

The test begins at a height where no failure is expected. The drop height is increased incrementally—usually by 1 inch at a time—until visible cracks appear in the coating.

A standard weight (often 2 lb or 4 lb) is dropped through a guide tube from a known height onto an indenter. The Testing Procedure Organic coatings are applied to

How much the coating can stretch with the substrate without breaking.