GB/T 18449.2-2001 (English Version) PDF

Standard No.: GB/T 18449.2-2001
Language: Chinese, Available in English version
Release Date: 2001
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Status: Be replaced 2013-06
Replace By: GB/T 18449.2-2012
Latest: GB/T 18449.2-2012

Scope: This standard specifies the inspection method of the Knoop hardness tester used to determine the Knoop hardness of metal materials according to GB/T 18449.1. The maximum test force of the hardness tester is 9.807N. This method is only applicable to indentations whose long diagonal length is not less than 20 μm. This standard describes the direct test method for checking the basic functions of hardness testers and the indirect test method suitable for the comprehensive test of hardness testers. The indirect test method can be used independently for regular routine inspection of hardness testers in use. If the hardness tester can also be used for hardness testing by other methods, the hardness tester shall be tested separately according to each method.

GB/T 18449.2-2001 history

2012 GB/T 18449.2-2012 Metallic materials.Knoop hardness test.Part 2:Verification and calibration of testing machines
2001 GB/T 18449.2-2001 Metallic knoop hardness test--Part 2: Verification of hardness testers