Class H is supplied with a standard range of pendulum capacities: 300 J, 450 J, 600 J and 750 J. This covers typical Charpy energy levels required by ASTM E23, ISO 148 and EN10045. The machine is also designed to work with R2 and R8 striking radii and a 30° striking angle, so most standard applications are already covered out of the box.

For labs with special materials or internal procedures, custom options can be discussed. In many cases this means adapting the pendulum to a specific energy window inside the 300 J to 750 J range, or providing a different striking edge geometry that still respects safe operation and the frame design. Such requests are considered case by case, taking into account machine limits, dynamic performance and safety.

If a project requires a non-standard configuration, the best approach is to share the target standard, specimen size and desired energy level so the technical team can confirm what is practical and safe.

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