---
title: 78HR15N, Superficial Rockwell Test Block
url: https://shop.opti-tech.ca/product/78hr15n-superficial-rockwell-test-block/
date: 2021-01-01T23:16:45+00:00
modified: 2025-12-30T19:38:53+00:00
lang: en_US
---

# 78HR15N, Superficial Rockwell Test Block

Rockwell test blocks serve as critical calibration tools for Rockwell hardness testers, ensuring that machines provide precise and repeatable hardness values. Manufactured under strict quality control, these blocks offer a stable reference point for verification in compliance with industry testing standards. They are widely used in laboratories, manufacturing, and material testing to maintain measurement accuracy.