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ASTM D6110 Plastic Charpy Impact Test of Notched Specimens

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ASTM D6110: Standard Test Method for Determining the Charpy Impact Resistance of Notched Specimens of Plastics


ASTM D6110 test method is used to determine the resistance of plastics to breakage by flexural shock as indicated by the energy extracted from standardized pendulum-type hammers, mounted in standardized machines, in breaking standard specimens with one pendulum swing. This test method requires specimens to be made with a milled notch. The notch produces a stress concentration which promotes a brittle, rather than a ductile, fracture. The results of this test method are reported in terms of energy absorbed per unit of specimen width.

The tests require specimens made with a milled notch, hence the test is often referred to as the “notched bar impact test”. In both the Charpy and Izod Tests, the notch produces a stress concentration which promotes a brittle, rather than a ductile, fracture.


ASTM D6110 Plastic Charpy Impact Test of Notched SpecimensASTM D6110 Plastic Charpy Impact Test of Notched Specimens
Related of anvil, specimen and striking edge of Charpy impact test


The results are reported in terms of energy absorbed per unit of specimen width, or more specifically, the energy absorbed in breaking the specimen which is equal to the difference between the potential energy at the moment of impact and the residual energy.


Charpy Test: The specimen is mounted horizontally and supported unclamped at both ends. The hammer is released and allowed to strike through the specimen. If breakage does not occur, a heavier hammer is used until failure occurs.


Charpy impact strength testing involves the use of a pendulum to break a test specimen being supported in a cantilever configuration. The impact energy absorbed in impacting a plastic specimen in a Charpy test is taken as being equal to the difference between the potential energy of the pendulum and the energy remaining in the pendulum after impacting the plastic specimen. Corrections accounting for friction and air-resistance losses must also be made to determine the true impact resistance of the plastic. 


Specimens tested to determine the impact strength through the Charpy impact resistance test and the practices of ISO 179 must be notched. Charpy impact testing of notched specimens in accordance to ISO179 is a common test to determine notch sensitivity of a plastic material. 

Test machines that are used to perform Charpy impact strength tests in accordance to ISO 179, and must meet the requirements of ISO 13802: verification of Charpy pendulum impact testing machines.

ISO 179: “Plastics -- Determination of Charpy impact properties”
ASTM D6110: “Standard Test Method for Determining the Charpy Impact Resistance of Notched Specimens of Plastics”.

Impact test specimen size:  80*10*4mm (length*width*thickness)

Related Standard

ISO 179 Plastics test of Charpy impact properties

ISO 179: Plastics -- Determination of Charpy impact properties

ASTM D6110: Standard Test Method for Determining the Charpy Impact Resistance of Notched Specimens of Plastics.


ISO 179 specifies a method for determining the Charpy impact strength of plastics under defined conditions. A number of different types of specimen and test configurations are defined. Different test parameters are specified according to the type of material, the type of test specimen and the type of notch.

The method can be used to investigate the behaviour of specified types of specimen under the impact conditions defined and for estimating the brittleness or toughness of specimens within the limitations inherent in the test conditions. It can also be used for the determination of comparative data from similar types of material.

ISO 9854 Pendulum impact strength by the Charpy method

ISO 9854: “Thermoplastics pipes for the transport of fluids -- Determination of pendulum impact strength by the Charpy method”

ISO 9854 Specifies the general test method to be used for the determination of the impact strength of unnotched test pieces cut from thermoplastics pipes for the transport of fluids. Not intended to be a reference test method for the determination of the impact strength of pipes. May be used for scientific research, materials testing or the examination of pipes when it is not possible to take measurements in accordance with the reference method.

Charpy Test: 

The specimen is mounted horizontally and supported unclamped at both ends. The hammer is released and allowed to strike through the specimen. If breakage does not occur, a heavier hammer is used until failure occurs. 

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