YB/T 4285-2012 (English Version) PDF

Scope: This standard specifies the test instruments, test procedures, calibration and inspection, accuracy and deviation of the hardness tester, and test report for the test method of using a portable hardness tester to test the indentation hardness of metal materials. This test method is only applicable to portable hardness testers using exactly the same nominal test force and indenter as specified in national standards GB/T 231.1, GB/T 230.1, and GB/T 4340.1. Portable hardness testers are mainly used to measure parts that are large in size and weight, are on fixed equipment, are difficult to measure using conventional hardness testers, and cannot apply test force vertically. This standard does not cover all aspects of safety in use. It is the user's responsibility to develop appropriate safety and health regulations and determine their suitability before use.

YB/T 4285-2012 Referenced Document

ASTM E140 Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, and Scleroscope Hardness
ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
GB/T 230 Metallic materials--Rockwell hardness test
GB/T 231 Metallic materials--Brinell hardness test
GB/T 4340.1 Metallic materials.Vickers hardness test.Part 1:Test method
GB/T 4340.2 Metallic materials.Vickers hardness test.Part 2:Verification and calibration of testing machines*， 2012-12-31 Update
GB/T 4340.3 Metallic materials.Vickers hardness test.Part 3:Calibration of reference blocks*， 2012-12-31 Update
GB/T 4340.4 Metallic materials—Vickers hardness test—Part 4：Tables of hardness values*， 2022-03-09 Update

2012 YB/T 4285-2012 Standard test method for indentation hardness of metallic materials by portable hardness testers