GB/T 18449.2-2012 "Metallic materials — Knoop hardness test — Part 2: Verification and calibration of testing machines" specifies two methods for verifying Knoop hardness testers: direct verification (separate testing of components such as force application, indenter, and measuring system) and indirect verification (overall performance verification using standardized hardness reference blocks). It defines the verification intervals, procedures, and tolerance requirements for various parameters of the hardness tester. The standard aims to standardize the confirmation and calibration of the performance status of Knoop hardness testers during use and periodic reviews, ensuring the accuracy of hardness test results.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | N71 | ICS | 77.040.10;19.060 |
| Release Date | 2012-12-31 00:00:00 | Implementation Date | 2013-06-01 00:00:00 |