Standard No.:	GB/T 9451-2005
English Name:	Determination of total or effective thickness of thin surface hardened layers of steel parts
Chinese Name:	钢件薄表面总硬化层深度或有效硬化层深度的测定
Chinese Classification:	J36    Heat treatment
Professional Classification:	GB    National Standard
Issued by:	AQSIQ;SAC
Issued on:	2005-7-21
Implemented on:	2006-1-1
Status:	valid
Superseding:	GB/T 9451-1988 Determination of total or effective thickness of thin surface hardened layers of steel parts
Language:	English
File Format:	PDF
Word Count:	3000 words
Price(USD):	60.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the definition and determination method of the total or effective thickness of thin surface hardened layers of steel parts. This standard is applicable to steel parts with total or effective thickness of surface hardened layer of less than 0.3mm. This standard is not applicable to parts with no transition layer between the hardened layer and base metal. 2 Normative References The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrigendum), or revisions of, any of these publications do not apply. However, all parties coming to an agreement based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies. 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 (ISO 2639: 2002, MOD) GB/T l8449.1-2001 Metallic Knoop Hardness Test - Part 1: Test Method 3 Terms and Definitions

Foreword i 1 Scope 2 Normative References 3 Terms and Definitions 4 Measurement Method 5 Test Report