Yamamoto Reference test blocks from Japan are used for verification that your hardness tester is measuring within tolerances and is compliant with performance standards.  

The Yamamoto blocks are the premier reference blocks in the industry.  The blocks are calibrated using a Rockwell HRC standard reference in accordance to ASTM E18-00 section C.

A wide range of blocks are available in regular, superficial and special scales with precision tolerances. Certified blocks are traceable to NIST.


Available in various nominal hardness values across the following test scales:

Rockwell scales: HRA, HRB, HRC, HR15N, HR15T, HR30N, HR30T (from $295 +GST)

Brinell scale: HB10/3000 (from $395 +GST)

Vickers scale: HV10, HV30, HMV1, HMV0.1, HMV0.001 (from $495 +GST)


Please contact us with your specific requirements.



SKU Yamamoto
Brand Yamamoto

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