GB/T 9451-2005
Determination of total or effective thickness of thin surface hardened layers of steel parts (English Version)

Standard No.

GB/T 9451-2005

Language

Chinese, Available in English version

Release Date

2005

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 9451-2005

Replace

GB/T 9451-1988

Scope

This standard specifies the definition of total hardened layer depth or effective hardened layer depth and its measurement method on the thin surface of steel parts. This standard is applicable to steel parts whose surface total hardened layer depth or effective hardened layer depth is less than 0.3mm. This standard does not apply to parts without a filter layer between the hardened layer and the base metal.

GB/T 9451-2005 Referenced Document

• GB/T 18449.1-2001 Metallic knoop hardness test Part 1: Test method
• GB/T 4340.1-1999 Metallic materials--Vickers hardness test-- Part 1: Test method
• GB/T 7232-1999 Terminology of metal heat treatment
• GB/T 9450-2005 Steels-Determination and verification of the depth of carburized and hardened cases

GB/T 9451-2005 history

• 2005 GB/T 9451-2005 Determination of total or effective thickness of thin surface hardened layers of steel parts
• 1988 GB/T 9451-1988 Determination of total or effective thickness of thin surface hardened layers of steel parts