GB/T 30834-2022 Active National standards

GB/T 30834-2022 Rating and classifying of inclusions in steel—Scanning electron microscope method

Publish Date: 2022-10-12 Implement Date: 2023-02-01 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 30834-2022

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: 2022-10-12

Implement Date: 2023-02-01

Pages: 23 pages

Scope

This document specifies the equipment used for evaluating and statistically analyzing non-metallic inclusions in steel by scanning electron microscopy (SEM), the calibration and verification of the equipment, sampling, sample preparation, test procedures, inclusion classification, grading and statistics, inspection reports, accuracy, and deviations.
This document recommends three inspection methods. Method 1 mainly classifies inclusions based on their morphology, and Method 2 mainly classifies inclusions based on their chemical composition. Methods 1 and 2 are suitable for microscopic evaluation of non-metallic inclusions larger than 2 μm in rolled or forged steel with a compression ratio of greater than or equal to 3. Method 3 is used to determine the specific details of a certain type of inclusions, such as volume fraction and quantity fraction, etc., and is suitable for statistical classification of inclusions of all sizes (including those smaller than 2 μm) in various cast billets or steel materials.

Development Information

Word Count: 48 Thousand words Pages: 23 pages

Replace the following standards

GB/T 30834-2014 Standard test methods for rating and classifying inclusions in steel—Scanning electron microscope

Referenced Standards

GB/T 10561-1989 Steel—Determination of content of non-metallic inclusion—Micrographic method using standard diagrams GB/T 10561-2005 Steel—Determination of content of nonmetallic inclusions—Micrographic method using standards diagrams GB/T 10561-2023 Determination of content of nonmetallic inclusions in steel—Micrographic method using standard diagrams GB/T 13298-1991 Metal—Inspection method of microstructure GB/T 13298-2015 Inspection methods of microstructure for metals GB/T 17359-1998 General specification of X-ray EDS Quantitative analysis for EPMA and SEM GB/T 17359-2012 Microbeam analysis—Quantitative analysis using energy dispersive spectrometry GB/T 17359-2023 Microbeam analysis—Quantitative analysis using energy-dispersive spectrometry (EDS) for elements with an atomic number of 11 (Na) or above GB/T 18876.1-2002 Standard practice for determining the metallographical constituent and inclusion content of steels and other metals by automatic image analysis—Part 1:Determining the inclusion or second-phase constituent content of steels and other metals by automatic image analysis and stereology GB/T 18876.1-2024 Standard practice for determining the metallographical constituent and inclusion content of steels and other metals by automatic image analysis—Part 1:Determining the inclusion or second-phase constituent content of steels and other metals by automatic image analysis and stereology GB/T 18876.2-2006 Standard practice for determining the metallographical constituent and inclusion content of steels and other metals by automatic image analysis—Part 2:Determining the inclusion ratings of steels by automatic image analysis and stereology GB/T 18876.2-2024 Standard practice for determining the metallographical constituent and inclusion content of steels and other metals by automatic image analysis—Part 2:Determining the inclusion ratings of steels by automatic image analysis and stereology GB/T 27788-2011 Microbeam analysis—Scanning electron microscopy—Guidelines for calibrating image magnification GB/T 27788-2020 Microbeam analysis—Scanning electron microscopy—Guidelines for calibrating image magnification GB/T 30067-2013 Standard terminology relating to metallography

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