GB/T 34474-2025 Active National standards

GB/T 34474-2025 Methods for determination of banded structure of steels

Publish Date: 2025-08-29 Implement Date: 2026-03-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 34474-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Metallographic examination methods

ICS Name: Other testing methods for metal materials

Publish Date: 2025-08-29

Implement Date: 2026-03-01

Pages: 52 pages

Scope

This document describes three methods for evaluating banded structures in steel: standard rating diagram method, quantitative method, and hardness method. It includes an overview of the methods, equipment, sampling, sample preparation, evaluation methods, test results, and inspection reports.
This document is applicable to the inspection and evaluation of banded structures in steel that have undergone plastic deformation.

Development Information

Word Count: 82 Thousand words Pages: 52 pages

Replace the following standards

GB/T 34474.1-2017 Determination of banded structure of steel—Part 1:Micrographic method using standards diagrams GB/T 34474.2-2018 Determination of banded structure of steel—Part 2:Quantitative method

Referenced Standards

GB/T 225-1988 Steel-hardenability test by end quenching(Jominy test) GB/T 225-2006 Steel—Hardenability test by end quenching (Jominy test) GB/T 4340.1-1999 Metallic materials—Vickers hardness test—Part 1:Test method GB/T 4340.1-2009 Metallic materials—Vickers hardness test—Part 1:Test method GB/T 4340.1-2024 Metallic materials—Vickers hardness test—Part 1:Test method GB/T 13298-1991 Metal—Inspection method of microstructure GB/T 13298-2015 Inspection methods of microstructure for metals GB/T 15749-1995 Manual measuring method in quantitative metallography GB/T 15749-2008 Measuring method in quantitative metallography GB/T 18449.1-2001 Metallic knoop hardness test Part 1:Test method GB/T 18449.1-2009 Metallic materials—Knoop hardness test—Part 1:Test method GB/T 18449.1-2024 Metallic materials—Knoop hardness test—Part 1:Test method GB/T 30067-2013 Standard terminology relating to metallography GB/T 33362-2016 Metallic materials—Conversion of hardness values

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