Information on the most widely used ASTM standards within the materials testing industry
Plastic Impact Tester
United Test product both the IZOD and Charpy impact tester, in dial display, LCD screen display and computer control used determine the impact ductility of nonmetallic materials, such as Rigid thermoplastic and thermosetting plastic, thermosetting plastic and thermoplastic after fiber-reinforced. It is widely used in the industries of plastic products, plastic manufacture, petro chemical etc, University, scientific research institute and commodity inspection department.
UnitedTest Popular Plastic Charpy / IZOD Impact Tester
Charpy & Izod Integrated Impact Tester
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Plastic Tensile Impact Testing Machine
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Electronic IZOD Impact Testing Machine ASTM D256
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ISO 179 Dial Charpy Impact Tester
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LCD Display Charpy Impact Tester
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What's the Impact Test method for plastic material?
Charpy Impact is a single point test that measures a materials resistance to impact from a swinging pendulum. Charpy impact is defined as the kinetic energy needed to initiate fracture and continue the fracture until the specimen is broken. The values obtained can be used for quality control or to differentiate general toughness.
Notched Izod Impact is a single point test that measures a materials resistance to impact from a swinging pendulum. Izod impact is defined as the kinetic energy needed to initiate fracture and continue the fracture until the specimen is broken. Izod specimens are notched to prevent deformation of the specimen upon impact. This test can be used as a quick and easy quality control check to determine if a material meets specific impact properties or to compare materials for general toughness.
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Plastic V notch impact sample 80*10*4mm | Organic glass V notch impact sample 80*10*4mm |
Charpy and IZOD test introduction
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 test Specimen size of ISO 179:
Specimens are 80 x 10mm by thickness. The specimens can be either notched or unnotched.
IZOD Test: The specimen is clamped into the pendulum impact test fixture with the notched side facing the striking edge of the pendulum. The pendulum is released and allowed to strike through the specimen. If breakage does not occur, a heavier hammer is used until failure occurs. Since many materials (especially thermoplastics) exhibit lower impact strength at reduced temperatures, it is sometimes appropriate to test materials at temperatures that simulate the intended end use environment.
Izod impact test Specimen size of ISO 180:
Thestandard specimen for ISO is a Type 1A multipurpose specimen with the end tabs cut off. The resulting test sample measures 80 x 10 x 4 mm. The depth under the notch of the specimen is 8mm.
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 180: “Plastics -- Determination of Izod impact strength”
ASTM D256: “Standard Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics”
ISO 9854: “Thermoplastics pipes for the transport of fluids -- Determination of pendulum impact strength by the Charpy method”
ISO 8256: "Plastic Stretch Impact Intensity Determination" (method A)
ASTM D1822: "Plastic And Electric insulation Material Stretch Impact Performance test Method".
Striking edge & Vice for ISO 9854, pipe impact test.
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| Standard bar test piece | Convex test piece | Small bar test piece |
Standard related
ISO 180 specifies unified methods to measure the Izod impact strength of plastics under standardized conditions, evaluating material brittleness and toughness via pendulum impact tests.
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 D1822 Tensile Impact Energy to Break Plastics and Electrical Insulating Materials
ASTM D1822 standard outlines test procedures to find the energy required to rupture tension-impact specimens of plastic or electrical insulating materials. Test materials that are too bendable or too thin to be tested in accordance with the ASTM D256 standard are ideal for this test along with more rigid materials.
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 specifying Charpy pendulum impact test to evaluate low-temperature and room-temperature toughness of fluid-transporting thermoplastic pipes. Part 1 defines universal test rules while Part 2 sets customized testing parameters for individual thermoplastic pipe grades (PVC‑U, PE, PP‑R, ABS, PVC‑O, PVC‑HI, etc.). It is a supplementary Charpy test alternative when the reference full-pipe drop-weight impact test (ISO 3127) cannot be implemented for factory QC or material R&D.
ISO 8256:2023 Plastics — Determination of tensile-impact strength
ISO 8256 specifies two methods (method A and method B) for the determination of the tensile-impact strength of plastics under defined conditions. The tests can be described as tensile tests at relatively high strain rates. These methods can be used for rigid materials (as defined in ISO 472), but are especially useful for materials too flexible or too thin to be tested with impact tests conforming to ISO 179 or ISO 180.These methods are used for investigating the behaviour of specified specimens under specified impact velocities, and for estimating the brittleness or the toughness of specimens within the limitations inherent in the test conditions. Similar with standard ASTM D1822.
These methods are applicable both to specimens prepared from moulding materials and to specimens taken from finished or semi-finished products (for example mouldings, films, laminates, or extruded or cast sheets).
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