The Class H system supports a full range of Charpy impact energies so labs can match the machine to their material requirements. It is available with pendulums rated at 300 J, 450 J, 600 J and 750 J, covering everything from general steel testing to high-toughness and heat-treated alloys. The 750 J pendulum is the highest-capacity option and is suitable for demanding applications where materials absorb large amounts of energy before fracture.

Each pendulum is designed and balanced for its specific energy level, ensuring the swing path and impact velocity remain consistent. Labs can start with one capacity and add others later if their test range changes. The machine’s frame and components are built to handle the full range safely, so switching to a higher-energy pendulum does not require a structural upgrade.

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