GB/T 17394.2-2022 Translated English of Chinese Standard (GB/T 17394.2-2022, GBT17394.2-2022): Metallic materials - Leeb hardness test - Part 2: Verification and calibration of hardness testers [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]

This document specifies the methods for the direct inspection and indirect inspection of the Leeb hardness testers (hereinafter referred to as hardness testers) in accordance with GB/T 17394.1. The direct inspection is suitable for checking whether the performance parameters of the hardness testers are within the specified range. The indirect inspection is to use the hardness value of the reference Leeb hardness test blocks calibrated in accordance with GB/T 17394.3 to check the overall performance of the hardness testers in the direction of gravity. Indirect inspection can be independently applied to regular routine checks of in-use hardness testers.