GB/T 18449.2-2012 (English Version) PDF

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

Scope: This part of GB/T 18449 specifies the inspection and calibration methods of the Knoop hardness tester (hereinafter referred to as the hardness tester) for the determination of the Knoop hardness of metallic materials according to GB/T 18449.1-2009. The test force ranges from 0.09807N to 19.614N. This section applies only to indentations with a long diagonal not less than 0.020 mm in length. This part applies to the direct test method for checking the basic functions of the hardness tester and the indirect test method for checking the comprehensive performance of the hardness tester. The indirect test method can be used independently for regular routine inspection of hardness testers in use. If the hardness tester is also used for hardness testing by other methods, the hardness tester shall be tested separately according to each method.

GB/T 18449.2-2012 Referenced Document

GB/T 13634 Metallic materials—Calibration of force-proving instruments used for the verification of uniaxial testing machines*， 2019-10-18 Update
GB/T 18449.1-2009 Metallic materials.Knoop hardness test.Part 1:Test method
GB/T 18449.3 Metallic materials.Knoop hardness test.Part 3:Calibration of reference blocks

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