The specified velocities of striking for the Class J – Charpy and Izod Automatic Impact Testing System are as follows:

ISO 179, GB/T 1043:

• For impact energies ≤5J: The velocity of striking is 2.9m/s.
• For impact energies >5J: The velocity of striking is 3.8m/s.

ASTM D6110:

• The velocity of striking is 3.46 m/s.

These velocities indicate the speed at which the pendulum strikes the specimen during impact testing. Impact velocity is an essential parameter that affects the energy absorbed by the specimen and influences the test results. Different standards may specify different velocities to ensure standardized testing conditions.

It is critical to adhere to the specified velocities of striking when conducting impact tests to ensure accurate and comparable results. The Class J – Charpy and Izod Automatic Impact Testing System provides the capability to adjust and control the striking velocity based on the specified requirements of ISO 179, GB/T 1043, and ASTM D6110 standards.

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