The measured impact value determines the toughness and brittleness of the steel at a particular temperature.

The impact test (Charpy)

The impact test determines the toughness/brittleness of the metal at a particular temperature. This test can be conducted at -40, -20, 0 or 20 degrees Celsius, for example.

A notch is created in a normalised block of steel. This block is then brought to the desired test temperature and placed in an impact pendulum. A so-called drop hammer mounted on a pendulum then strikes the block at the notched position.

Results

The impact value can change after a change of temperature into the steel.

Application

The impact test results provide information for applications in the following sectors:

→ Steel structures in construction
→ Shipping
→ Road safety 

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