Specifies Charpy V-notch impact testing of metallic materials using a pendulum striker to measure absorbed energy, supporting toughness comparisons and quality verification of steels and cast products.
ISO 148-1
Revision: 2016
Impact testing
Metallic materials — Charpy pendulum impact test
Specifies Charpy V-notch impact testing of metallic materials using a pendulum striker to measure absorbed energy, supporting toughness comparisons and quality verification of steels and cast products.
Test method
A notched bar is broken by a single pendulum blow; absorbed energy is reported from the machine indication, with requirements for machine verification, notch geometry, and test temperature.
Specimen requirements
Standard full-size, sub-size, or reduced specimens may be used per annexes; notch preparation is critical. Specimen alignment in anvils and striker geometry compliance affect results; low-temperature tests require controlled baths.
Charpy energy is not a fundamental property; comparisons require consistent specimen type, notch, and temperature.