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Yamamoto Hardness Test Blocks

Yamamoto Hardness test block, HRC,HV,HBW.

Hardness uniformity test blocks meeting with world’s highest standards
Universal reference values based on JIS/ISO standards
Highly stable and reliable hardness values

These high hardness uniformity hardness test block have been achieved in Japan and is accepted around the world in compliance with JIS/ISO standard values. YSTL standard hardness blocks are used worldwide as hardness blocks for the indirect verification of hardness testers.

Yamamoto Scientific Tool Laboratory (YSTL) was established in 1952 as the world’s first manufacturer specializing in standards hardness blocks in Funabashi city, Chiba. Since then, YSTL’s hardness blocks are used in a wide range of countries throughout Europe, America, Australia, and Asia because of their global reputation for superior quality.

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