---
title: 90HR15Y, Superficial Rockwell Test Block, Carbide
url: https://shop.opti-tech.ca/product/90hr15y-superficial-rockwell-test-block-carbide/
date: 2021-01-01T23:21:57+00:00
modified: 2025-12-30T19:39:05+00:00
lang: en_US
---

# 90HR15Y, Superficial Rockwell Test Block, Carbide

Rockwell test blocks are used to verify the accuracy and calibration of Rockwell hardness testers across different Rockwell scales. These blocks are produced to strict industry specifications, offering a reliable reference for consistent and traceable hardness measurements. Each block is certified to ensure compliance with hardness testing standards in laboratory and production environments.