Chinese Standard: GB/T 18449.3-2012

Metallic materials—Knoop hardness test—Part 3:Calibration of reference blocks

MOD  ISO 4545-3:2005

全国试验机标准化技术委员会(SAC/TC 122)

GB/T 18449的本部分规定了在GB/T 18449.2—2012中描述的努氏硬度计间接检验用标准硬度块（以下简称标准块）的标定方法。
本部分仅适用于长对角线长度不小于0.02 mm的压痕。

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