What’s the difference between Charpy impact testing and Izod impact testing?

What is the difference between plastic charpy impact testing and izod impact testing? Pendulum impact testing machine is to test the impact resistance of non-metallic materials such as plastic, nylon, rubber, glass fiber reinforced plastic, composite plastic pipes, electrical insulation materials, etc. under dynamic load Of testing equipment. The difference between the simple plastic Charpy Impact Tester impact testing machine and the cantilever beam impact testing machine is mainly in the following aspects: 　

1. Different test standards: 　　

Plastic Charpy Impact Testing Machine It complies with ISO 179, GB/T 1043, GB/T 2612, JB/T 8762, GB4742 standards. 　　

Izod impact testing machine It complies with IS0 180, ASTM D256, GB/T 1843, GB/T 2611, JB/T 8761 and other standards. 　　

2. The impact strength test range is different:

The plastic Charpy Impact Tester impact tester measures the resistance of the material when it is impacted by the pendulum. The impact energy of a Charpy Impact Tester is defined as the energy absorbed when the sample is damaged under the impact load. It is a performance index that can be used in the quality control of the production process and can also be used to compare the toughness of different materials. 　　

The Izod impact tester measures the impact resistance of the material when it is impacted by the pendulum. Izod impact strength (notched). The Izod impact strength of notched specimens is defined as the energy absorbed from the material's initial failure to complete failure. In order to prevent damage to the sample, there are notches on the impacted sample. This experiment can be used for quick quality control inspections to determine whether a material meets the required impact strength requirements, and it can also be used to compare the toughness and thermal deformation of the material with a Vicat tester. 　　

3. Different test methods: 　　

Plastic Charpy Impact Tester Impact Tester It is to place the sample horizontally, and the two ends are not fixed. Release the pendulum to impact the specimen. If the sample is not damaged, change to a heavier pendulum and repeat the above steps until the sample is damaged.

Izod impact testing machine It is an impact elastic testing machine where the sample is placed vertically and clamped in the impact testing machine, with the notched side facing the edge of the pendulum. Release the pendulum to impact the specimen. If the sample is not damaged, change to a heavier pendulum until the sample is damaged. This experiment can also be carried out at a lower temperature. 　　

4. Different sample sampling specifications: 　　

The thickness of the sample of the plastic Charpy Impact Tester impact tester is 80×10mm. It does not matter with or without notch. 　　

Izod impact testing machine Its standard sample size in ASTM is 64×12.7×3.2mm (2.5×0.5×0.125 inches). The general thickness is 3.2mm (0.125 inches), and the better thickness is 6.4mm (0.25 inches), because it will not bend or brittle so easily. The depth of the sample notch is 10.2 mm (0.4 inch). The standard sample in ISO is a type 1A multipurpose sample with end tabs cut off. The size of the sample after shaved off is 80×10×4mm. The depth of the notch of the sample of the peel tester is 8mm. 　　

5. Different test data: 　　

The unit of impact energy of plastic Charpy Impact Tester impact testing machine is Joule. Impact strength is the ratio of impact energy (J) to the cross-sectional area of the notch. The greater the test data, the greater the toughness of the material. 　　

Izod impact testing machine. Its impact energy unit in ASTM (American Society for Testing and Materials) is J/m or ft-lb/in. The impact strength is the impact energy (in J or ft-lb) divided by the thickness of the sample. The test result is usually the average of 5 samples. The unit of impact energy at ISO is kJ/m2. Impact strength is the ratio of impact energy (in J) to the area under the notch. The test result is usually the average of 10 samples. The greater the value of the result, the greater the toughness of the material.

6. Technical Parameters: