Izod Impact Testing

Written by Vishal Ranjan | Updated: October 18, 2025

Izod Impact Testing

Written by Vishal Ranjan |  Updated: October 18, 2025

Main features of  Izod Impact Testing

The sample utilized for the tests is one similarity. Both tests employ notched specimens that are struck by a pendulum striker that is swinging. Frequently, the test object is a metal bar with a V-shaped notch.

The placement of the specimens in the impact testing apparatus is the primary distinction between the two tests. Whereas the specimen for the Izod impact tester is cantilevered in a vertical position, the specimen for the Pendulum Charpy impact tester is a horizontal beam secured at both ends.

Three notches are possible on the Izod specimen. As a result, a Pendulum izod impact tester may examine a specimen for numerous fractures.

Metal and plastic materials can both be tested for toughness using the Izod impact method. Only metallic materials are tested for using the Charpy method. One of the reasons why many people favour the Izod impact testing device is its versatility.

Read more: Izod Impact Test – Specimen Dimensions

A description of the Izod impact test process

Izod tests are frequently run on a machine that is equipped with a weighted pendulum. This pendulum is raised to a specific height by the machine’s operator, who then locks it in place. Afterwards, a specimen with a notch is fixed to a support anvil in the machine’s lower section.

The tester checks for safety calibrates a dial and then flips a switch to let the pendulum swing. The exposed end of the specimen with the notch is then struck by the pendulum as it swings. The specimen’s energy absorption is subsequently calculated.

The aircraft, building, automotive, and shipbuilding industries all rely on the impact test. This test must be performed for other material-producing sectors as well. This is to guarantee that the products are long-lasting, of the highest calibre, and secure.

Infinita Lab sells some models with the following attributes:

Dual and Single Column

The impact frame of the tester is referenced by the columns. A front and a rear impact frame are present in double-column ones. In comparison to a single-columned frame, a double-columned frame has a stronger support system.

Enclosed and Open Testers

The fundamental Pendulum impact testing device is an open device. This indicates that there is no protective casing on the device. This configuration provides less security. With an open machine, there is a possibility that pieces will fly all over the place.

Pendulum impact testers that are enclosed have a full protective covering. Because it is made of strong materials, the enclosure will be better protected during impact testing.

Servo motors and regular motors

Standard direct current motors power the fundamental models. These are standard two-wired motors with a ground and power wire. A three-wire motor configuration is known as a servo motor. In addition to power and ground, the motor also features a complex controller. Servo motor-equipped advanced impact testers can offer more precise positioning.

Impact Testing Izod Industry Standards

Industry standards that can be tested on Infinita lab. impact testing equipment includes ISO 148, EN 10045, ASTM E23, ASTM E1820, ASTM E2298, and DIN 50115.

Internationally recognised test procedures for metallic materials are described in ISO 148. The requirements for Charpy impact strength testing are listed in this standard.

A European standard called EN 10045 describes how to test metallic materials. Moreover, Charpy impact strength testing is intended to use this.

The test procedures for notched bar impact testing are described in ASTM E23. It also includes criteria for metallic materials. Both the Charpy and the Izod impact strength tests can use this standard.

Methods for evaluating fracture toughness are described in ASTM E1820. Fractures are divided into several values according to these criteria. Metallic materials can also be tested using the procedures. When it is impossible to foresee the specimen’s behaviour before the test, this standard can be helpful.

The instrumented impact testing of metallic materials is covered by ASTM E2298. To gather more data, this necessitates the installation of sensors and tools for Impact testers. The Charpy impact test is likewise covered by the standard.

This standard, DIN 50115, addresses notched bar impact bend testing. The standard outlines requirements for testing metallic materials as well as test specimens that are not ISO compliant.

The ISO or ASTM material standards must be followed while conducting an Izod impact test. The standard to adhere to relies on the demands of impact testing. The units of measurement used in ISO and ASTM standards differ from one another.

The impact strength calculation differs between the two standards. According to ASTM, impact strength is calculated by dividing the impact energy (expressed in Joules) by the specimen material’s thickness. According to ISO, the impact strength is calculated by dividing the impact energy, which is expressed in Joules, by the area around the notch.

Unique Characteristics Izod Impact Tests

The cutting-edge equipment from Infinita lab. offers the following unique features:

  • Improved protection during impact testing with an enclosed case.
  • Has a touchscreen interface that can be used to interact with the machine. includes a choice to link to a PC for sophisticated software analysis.
  • At the start of the test, a servo motor places the pendulum hammer into place. After the test, it can reset the arm to its initial position. The pendulum can be stopped using the servo motor as well. It also enables the testing of predetermined angles.
  • Adding a force sensor within the pendulum striker is an option. This facilitates taking sophisticated force and energy measurements as well as exact data samples.
  • High-quality PLC installed for precision pendulum arm positioning.
  • Machines are tested in accordance with industry standards.
  • Access to the most recent Electromechanical TestPilot Control Software is an option. Advanced capabilities including real-time displays, graphing, and curve analysis are available with this software.

Advantages of goods from Infinita lab.

  • The majority of the equipment has a user-friendly interface and is simple to use. Also, the operating manuals are quite simple to comprehend.
  • High accuracy. The organization makes sure that every machine is accurate and dependable.
  • Products can be modified to meet user requirements.

So that equipment problem are fixed as soon as feasible, technical support has a quick response time.

Products have the most recent industry certifications.

The business provides a lifetime consulting benefit. In addition, they offer technical assistance throughout the machine.

Additionally, they can offer product training and yearly equipment calibration.

ABOUT AUTHOR

Vishal Ranjan is an experienced Materials Consultant and Structural Engineer with over 5 years of material selection, testing, and failure analysis expertise. He specializes in investigating and reconstructing material failures and providing scientifically sound recommendations rooted in advanced engineering principles. Currently serving as a Customer Engagement Manager, Vishal combines his technical background with client-focused strategies to deliver practical, high-impact solutions in materials and structural engineering. His work is grounded in a strong academic foundation: He holds an M.Tech in Structural Engineering from IIT Kanpur, one of India's premier engineering institutions. Vishal’s approach is both analytical and results-driven.

He has a proven ability to bridge technical insights with real-world applications. He has played a key role in various projects requiring precise evaluation of structural integrity, root cause failure investigations, and materials performance under diverse environmental and operational conditions. Through his work, Vishal continues to contribute to advancements in engineering practices and client solutions, focusing on safety, durability, and innovation.

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