Standard No.:	GB/T 224-2019
English Name:	Determination of the depth of decarburization of steels
Chinese Name:	钢的脱碳层深度测定法
Chinese Classification:	H24    Metallographic testing method
Professional Classification:	GB    National Standard
ICS Classification:	77.040.99 77.040.99    Other methods of testing of metals 77.040.99
Issued by:	SAMR and SAC
Issued on:	2019-06-04
Implemented on:	2020-5-1
Status:	valid
Superseding:	GB/T 224-2008 Determination of depth of decarburization of steels
Language:	English
File Format:	PDF
Word Count:	8500 words
Price(USD):	140.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the requirements for sampling, measuring methods and test reports of the decarburization of steel products. This standard is applicable to the determination of the depth of decarburization of steels (billets) and their parts. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 4336 Carbon and Low-alloy Steel — Determination of Multi-element Contents — Spark Discharge Atomic Emission Spectrometric Method (Routine Method) GB/T 4340.1 Metallic Materials — Vickers Hardness Test — Part 1: Test Method (GB/T 4340.1, ISO 6507-1:2005, MOD) GB/T 13298 Inspection Methods of Microstructure for Metals GB/T 15247 Microbeam Analysis — Electron Probe Microanalysis — Guidelines for Determining the Carbon Content of Steels Using Calibration Curve Method (GB/T 15247-2008, ISO 16592:2006, IDT) GB/T 18449.1 Metallic Materials — Vickers Hardness Test — Part 1: Test Method (GB/T -2009, ISO 4545-1:2005, MOD) GB/T 19502 Surface Chemical Analysis — Glow Discharge Optical Emission Spectrometry (GD-OSE) — Introduction to Use (GB/T 19502-2004, ISO 14707:2000, IDT) GB/T 20126 Unalloyed Steel — Determination of Low Carbon Content — Part 2: Infrared Absorption Method after Combustion in an Induction Furnace (with Preheating) (GB/T 20126-2006, ISO 15349-2:1999, IDT) GB/T 22368 Low-alloy Steel — Determination of Multi-element Contents — Glow Discharge Optical Emission Spectrometry (Routine Method) GB/T 30067 Standard Terminology Relating to Metallography ISO 9556 Steel and Iron — Determination of Total Carbon Content — Infrared Absorption Method after Combustion in an Induction Furnace ISO 14594 Microbeam Analysis — Electron Probe Microanalysis — Guidelines for the Determination of Experimental Parameters for Wavelength Dispersive Spectroscopy

Foreword II 1 Scope 2 Normative References 3 Terms and Definitions 4 Sampling 5 Measuring Methods 6 Test Report Annex A (Informative) Examples of Typical Decarburization Microstructure Measured by Metallographic Method