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Gardner Impact - ASTM D3029

Energy required for 50% of the specimens tested to fail after being impacted by falling weight or dart (tup).

Two testing methods are used.
Method F: Free-falling dart (tup).
Method G: Guided weight falls on impactor head resting on specimen.

Method Geometry Striker Diameter (mm) Support Plate Inner Diameter (mm)
FA 15.86 76.2
FB 12.7 38.1
FC 38.1 127
GA 15.86 76.2
GB 15.86 31.75
GC 15.86 16.26