JJG 1048-2009
Verification Regulation of Knoop Hardness Reference Blocks (English Version)

Standard No.

JJG 1048-2009

Language

Chinese, Available in English version

Release Date

2009

Published By

National Metrological Verification Regulations of the People's Republic of China

Latest

JJG 1048-2009

Scope

This procedure is applicable to the initial verification, subsequent verification and in-service inspection of standard Knoop hardness blocks with a test force range of 0.09807N to 19.614N. The diagonal length of the indentation of the standard Knoop hardness block should be greater than or equal to 0.020mm.

JJG 1048-2009 Referenced Document

• ISO 4545-1:2005 Metallic materials - Knoop hardness test - Part 1: Test method
• ISO 4545-2:2005 Metallic materials - Knoop hardness test - Part 2: Verification and calibration of testing machines
• ISO 4545-3:2005 Metallic materials - Knoop hardness test - Part 3: Calibration of reference blocks
• JJG 144-2007 Verification Regulation of Standard Dynamometers

JJG 1048-2009 history

• 2009 JJG 1048-2009 Verification Regulation of Knoop Hardness Reference Blocks