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.

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.

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. 
 
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. 

Feature of XJJUD series LCD Display electronic Charpy & IZOD both in one impact testing machine:

1, LCD display, Charpy & Izod Test on same one test frame;
2, Adopts rotate encoder grating side angle technology, high accuracy, high reliability, and big measuring range;
3, Support vice, pendulum is nickel coating, good appearance and anti-corrosion.
4, Standard ISO 179, ASTM D6110, ISO 9854.
Standard ISO 180, ASTM D256.
5, Indicate impact energy, impact strength, initial angle, rising angle, energy loss etc.,
6, Automatic correcting the energy loss; Auto-print and save the records.



   
 Plastic V notch impact sample 80*10*4mm             Organic glass V notch impact sample 80*10*4mm
 

By testing plastics with the Charpy test method the impact resistance of the plastic can be determined. Charpy impact testing can also be used to determine the sensitivity of notched plastics specimens. Impact resistance of plastic notched specimens measures how will a cracked plastic specimen will withstand an impact.

Loadframe,
pendulum,
supporting vice jaws,
specimen centering plate,
spanner,
manual etc.

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".