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Metal Impact Tester

United Test Pendulum Impact Testing Machine mainly used to determine the anti-impact capability of ferrous metal materials with high toughness, especially for steel and iron material and their alloy, under dynamic load impacting. They are essential testing instruments for quality testing section, university and college, research institution and industrial and mining enterprise. The machine can do the test according to ASTM E23 and ISO 148 or other equal standards.

UnitedTest Metal Impact Testing Machine

Feature:

  • Instrumented impact test
  • impact value, collect and analysis the impact

Key parameter:

  • Impact energy: 300J/150J, 250J/500J
  • Pendulum preparing angle: 150º
Details

Feature:

  • Pendulum rising, impact, free releasing automatically by micro control meter or remote control box
  • Two pendulums

Key parameter:

  • Impact energy: 300J/150J, 250J/500J
  • Pendulum preparing angle: 150º
Details

Dial Display Impact Tester

Model: JB-300B, JB-500B

Feature:

  • Pendulum rising, impact, free releasing is realized as automatically by remote control box
  • Dial scale display

Key parameter:

  • Impact energy: 300J/150J, 250J/500J
  • Pendulum preparing angle: 150º
Details

Feature:

  • Pendulum rising, impact, free releasing etc. action can be controlled easily by PC mouse simple click, as well as the remote control box

Key parameter:

  • Impact energy: 300J/150J, 250J/500J
  • Pendulum preparing angle: 150º
Details

What's the metal impact testing?

The Charpy impact test, also known as the Charpy V-notch test, is a standardized high strain-rate test which determines the amount of energy absorbed by a material during fracture. This absorbed energy is a measure of a given material's notch toughness and acts as a tool to study temperature-dependent ductile-brittle transition. It is widely applied in industry, since it is easy to prepare and conduct and results can be obtained quickly and cheaply. 


The energy capacity can be from 50J, 150J, 250J, 500J to 750J or even more according customer requirement. With dial display, touching screen type, computer control type etc., can be operated semi-automatically or fully automatic sample feeding. Or Instrumented chieve parameter of Impact velocity, impact time, impact energy, absorb energy, displacement, crack forming energy, crack extension energy, yield load, yield time, peak load, time of peak load, displacement of peak load, energy of peak load, unstable crack extension start load, unstable crack extension stop load, unstable crack extension start energy etc.


Main standard and principle:

The Charpy Impact Test is commonly used on metals, but is also applied to composites, ceramics and polymers. With the Charpy impact test one most commonly evaluates the relative toughness of a material, and as such, it is used as a quick and economical quality control device.

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The standard Charpy Impact Test specimen consist of a bar of metal, or other material, 55x10x10mm having a notch machined across one of the larger dimensions.

V-notch: 2mm deep, with 45° angle and 0.25mm radius along the base

U-notch and keyhole notch: 5mm deep notch with 1mm radius at base of notch


Mainly standard: 

ASTM E23 “Standard Test Methods for Notched Bar Impact Testing of Metallic Materials”

ISO 148 “Metallic materials -- Charpy pendulum impact test”

BS EN 10045 “Charpy impact test on metallic materials. Test method (V- and U-notches)” 

GOST 9454 “Metals. Method for testing the impact strength at the low, room and high temperature”


Pendulum impact test principle
Metal sample after impact

How Does an Impact Test Work?

An impact test works by striking a properly prepared and fixtures test specimen with a weight, either from the side or from above. For Charpy and IZOD impact tests, a pendulum with a weighted hammer is released from a specific height. The arc of its motion strikes the vertically oriented test specimen on its side. For drop-weight impact tests and dynamic tear tests, a weight is guided by rails and dropped directly onto a test specimen from above. For each type of impact test, a notch is cut into the test specimen, forcing the fracture of the specimen to occur at a repeatable location.


Why Impact Testing is Done? 

Impact tests are performed so that engineers, manufacturers, scientists, and researchers can characterize how a material behaves when subjected to a sudden load. This allows engineers and designers to optimize product designs for particular applications. It also helps manufacturers to establish quality control standards for their products and enables scientists and researchers to characterize a material’s toughness. Each of the items described facilitates the creation of products and structures that are safer for the end user.


How Are Impact Test Specimens Prepared?

Test specimen preparation is an important key to generating accurate impact test results. The test specimen for each type of impact testing requires a notch to be cut in the sample. However, the particular type of notch depends on the type of impact test to be conducted. Each impact test specimen has a V-shaped notch cut into it. Notches are cut into test specimens because it forces specimens to break if the force imposed by the impact is strong enough. As is the case with Charpy and Izod tests, the impact strength of a part can be determined since the energy absorbed by the test specimen can be related to the potential and kinetic energy of the pendulum. For drop-weight and dynamic tear tests, the breakage or deformation of the part is used as a pass-fail criterion.


Test Specimen

According to ASTM A370, the standard specimen size for Charpy impact testing is 10 mm × 10mm × 55mm. Subsize specimen sizes are: 10 mm × 7.5 mm × 55mm, 10 mm × 6.7 mm × 55 mm, 10 mm × 5 mm × 55 mm, 10 mm × 3.3 mm × 55 mm, 10 mm × 2.5 mm × 55 mm. Details of specimens as per ASTM A370 (Standard Test Method and Definitions for Mechanical Testing of Steel Products).


According to EN 10045-1, standard specimen sizes are 10 mm × 10 mm × 55 mm. Subsize specimens are: 10 mm × 7.5 mm × 55 mm and 10 mm × 5 mm × 55 mm.


According to ISO 148, standard specimen sizes are 10 mm × 10 mm × 55 mm. Subsize specimens are: 10 mm × 7.5 mm × 55 mm, 10 mm × 5 mm × 55 mm and 10 mm × 2.5 mm × 55mm.

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Standard energy impact reference sample
Impact Test


This standard impact specimen mainly used for metal pendulum impact testing machine energy calibration, compare the impact testing machine, evaluation impact tester software, examine operator etc.

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Beijing United Test Co., Ltd.