How to Determine a Material’s Impact Resistance by the Charpy Impact Test?

Written by Testing Instrument  »  Updated on: October 23rd, 2024

How to Determine a Material’s Impact Resistance by the Charpy Impact Test?

Manufacturers hailing from the polymer industry have to understand the vitality of these polymer plastics as they are used in various industries for different purposes like quality assurance, safety, research & development as well as in compliance with industry standards. This makes it the foremost duty of manufacturers from this or related industry to determine the strength of these materials.

The major industries that utilize hard polymer materials in their construction processes are automobiles, electrical appliances, the smartphone industry, etc. All these industries have different motives for utilizing the material because of the wide range of mechanical properties it carries.

As an operator of the production process, it becomes vital to make informed decision-making by segregating the materials according to their mechanical properties and especially as to their ability to withstand impacts. This not only safeguards the consumer but also promotes the brand identity.

To provide consumers with maximum safety, quality assurance, and standard compliance it becomes vital for manufacturers to assess the impact resistance of these materials. To measure the impact resistance with maximum accuracy, the Presto Group offers a top-notch lab testing instrument for manufacturers by the name of Izod and Charpy impact testers.

The instrument is designed with extreme precision & high-class engineering standards based on the study of two scientists who discovered the method of assessing the impact resistance of plastic materials by conducting the Charpy impact test and Izod impact test.

Conducting the Charpy Impact Test

The Charpy impact test and the Izod impact test are conducted with an extremely simplistic mechanism as mentioned by the two great scientists that precisely determines the impact strength of hard plastics in both horizontal impacts as well as vertical impacts.


The Charpy impact test is conducted only on bigger samples as the jaw adjustment in the horizontal assembly is bigger than in the vertical assembly. Therefore, to conduct the Charpy impact test the operator has to adjust the bigger specimen inside the carved-out regions i.e., the rugged surface of the horizontal jaw.


Once the specimen is adjusted, the operator must close the magnetic door to avoid the polymer particles from harming anybody or anything around the instrument.

The operator can now adjust the weight on the hammer of the resistance as it is offered with differently weighted hammers that generate different energy levels at the time of impact i.e. R1, R2, R3, R4 & R5. The energy of hammers differs from 1.7 joules to 21 joules.

After adjusting the weight and the hammer, the operator can remove the brake pedal and release the hammer that moves in a pendulum motion, striking the specimen that is clamped in the specimen at the force generated by the weighted hammer.


The impact from the hammer breaks the specimen into halves and the force that the specimen could withstand before breaking is indicated on the microprocessor-based digital display.

The difference between Izod and Charpy impact tests is the conditioning of the specimen and its position. In the Izod impact test, the specimen is run through a notch cutter that carves out a 2.54 mm notch in a V shape that allows the hammer to continue the notch by impacting the specimen at the notch.

Another difference between Izod and Charpy impact tests is the placement of the specimen in vertical and horizontal clampers respectively. The size of the samples in both tests also differs as the sample in the Izod impact test is relatively smaller than in the Charpy impact test.

The Izod and Charpy impact test is conducted with facile and minimal hassle due to the top-notch features added by the Presto Group in the construction of the instrument.

Top-notch Features that Assist the Charpy Impact Test Conduction

The Charpy and Izod tests are conducted with the help of features that make the testing experience a lot more enhanced, seamless, expeditious, and accurate.

The first and foremost feature that has caught the attention of manufacturers from all across the globe is the magnetic door for the safety & security of the operator and other things around the testing instrument.

Another top-notch feature is the incorporation of different weighted hammers that allow the manufacturer of the polymer to comply with different standards and achieve even better durability levels with absolute facile & ease. The weights that are offered with the instrument can generate a striking force of up to 21 joules.

The Izod & Charpy impact tester also has an amazing and high-quality control panel that is necessary for a seamless testing experience. The control panel contains feather touch controls and a microprocessor-based digital display for easy conduction & easy reading of the test results. the instrument also offers a rotary switch to turn itself on/ off.

Another feature integrated into the control panel of the instrument is the availability of the memory hold button that keeps track of previous results and allows the operator to analyze the obtained results with a lot more precision.

Achieving highly accurate test results while conducting the Charpy and Izod impact test is a lot easier with the inculcation of the brake release mechanism that enables the hammer to release in a pendulum mechanism.

The instrument is built out of a strong mild steel material that empowers the instrument’s long-term durability and protects it against rusting by assisting the mild steel with powder-coated layers that act as a shield against rusting.

Get an Izod & Charpy Impact Tester Today!

If you also want to attain accurate results while conducting the Izod and Charpy impact test, you can get yourself the top-notch lab testing instrument right away. To seek more & further information regarding the Izod & Charpy impact tester price & specifications, you can get yourself onto our website without any further delay.

To place an order for the instrument as soon as possible, call us directly at +91 9210903903 or e-mail us directly, stating your feedback at [email protected]. Help us serve you with future-oriented technologies. 


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