Charpy test setup

TINIUS OLSEN 400 Joules impact hammer

TINIUS OLSEN 400 Joules impact hammer

Determine the failure mode of your material (brittle or ductile) at different temperatures, notch locations and orientations. This destructive test evaluates a material's impact resistance, also known as toughness.


  • In-house machined samples in accordance with standard ASTM A370:
    • Standard dimensions: 55 mm x 10 mm x 10 mm
    • Minimum dimensions: 55 mm x 10 mm x 2.5 mm
    • Common practice V-notch, but also U-shaped, keyway… notches are possible
  • Impact energy up to 400 J
  • Testing temperatures ranging from -20 °C to 20 °C.


  • Determine toughness of metals, plastics and composites.
  • Impact testing at different temperatures to capture ductile-to-brittle behaviour.
  • Girth weld analysis with notch applied in weld metal center (WMC), heat-affected-zone (HAZ) and base material (BM).
  • Three repeat tests are conducted for every configuration (temperature, notch location and orientation) in order to have statistically sound results.

Working principle:

A Charpy impact test is a dynamic test in which a notched specimen is struck and broken by a single blow of a freely swinging pendulum. The difference in height of the upward swing of the pendulum is used to determine the absorbed energy in the fracture event.

Reported data:

For each specimen, the following data is reported:

  • the specimen thickness [mm];
  • the net cross sectional area, An [mm²];
  • the test temperature [°C];
  • the absorbed Charpy V impact energy [J];
  • the percentage shear fracture [%], determined following ASTM E 23;
  • the lateral expansion [mm], determined following ASTM E 23.