JJG 944-2013
Verification Regulation of Metallic Webster Hardness Testing Machines (English Version)

Standard No.

JJG 944-2013

Language

Chinese, Available in English version

Release Date

2013

Published By

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

Latest

JJG 944-2013

Replace

JJG 944-1999

Scope

This procedure is applicable to the initial calibration, subsequent calibration and in-use inspection of metal Webster hardness testers (hereinafter referred to as hardness testers) with a measurement range of (0~20) HW.

JJG 944-2013 Referenced Document

• GB/T 4340.1 Metallic materials.Vickers hardness test.Part 1:Test method
• JJG 113-2003 Verification Regulation of Metallic Rockwell Hardness Reference Blocks (scales A,B,C,D,E,F,G,H,K,N,T)*， 2024-04-20 Update

JJG 944-2013 history

• 2013 JJG 944-2013 Verification Regulation of Metallic Webster Hardness Testing Machines
• 1999 JJG 944-1999 Verification Regulation of Metallic Webster Hardness Testing Machine