标准编号：ISO 4545-2:2017
中文名称：金属材料 努氏硬度试验 第2部分： 试验机械检验和校准
英文名称：Metallic materials — Knoop hardness test — Part 2: Verification and calibration of testing machines
发布日期：2017-12
标准范围
This document specifies the method of verification and calibration of testing machines for determining Knoop hardness for metallic materials in accordance with ISO 4545-1.
A direct method of verification and calibration is specified for the testing machine, indenter, and the diagonal length measuring system. An indirect verification method using reference blocks is specified for the overall checking of the machine.
If a testing machine is also to be used for other methods of hardness testing, it will be verified independently for each method.
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