The Charpy impact test can adequately detect this brittle-toughness transition temperature, providing key data on the material’s limits of use. It must be noted, however, that the Charpy test is less ...

The test is named after Georges Charpy, who was the first to standardize impact testing. Brittle materials can absorb less impact before fracturing and colder temperatures increase brittleness. The ...

A H4-class steel pole (Figure 3) made of ASTM A871 self-weathering steel was used in the test. The pole had a yield strength of 65 ksi (448 MPa) with a Charpy V-Notch Impact Value of 15 ft-lb (20.3 ...