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Hardness comparison table according to ISO 18265

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Hardness comparison table

The comparison table below is valid only for carbon steels, low alloy steels and cast steels in the hot formed and heat treated condition acc. to ISO 18365. 

For high alloyed and / or cold treated steels (eg. 6.8, A2, A4) there are considerable differences to be expected.

hardness comparison table

Hardness conversion calculator

Use the Bossard Online Hardness Converter to calculate hardness values or hardness to tensile strength for unalloyed and low-alloy steels or cast steels.