GB/T 30834-2022 (English Version) PDF

Standard No.: GB/T 30834-2022
Language: Chinese, Available in English version
Release Date: 2022
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 30834-2022
Replace: GB/T 30834-2014

Scope: This document specifies the equipment, calibration and verification of equipment, sampling, sample preparation, test procedures, inclusion classification, rating and statistics, inspection report, Precision and Bias. This document recommends three inspection methods. Method 1 mainly classifies inclusions based on morphology, and Method 2 mainly classifies inclusions based on chemical composition. Method 1 and method 2 are suitable for microscopic assessment of non-metallic inclusions larger than 2 μm in rolled or forged steels with a compression ratio 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, number fraction and other stereological parameters, and is applicable to the statistical classification of inclusions of all sizes (including below 2 μm) in various slabs or steel products.

GB/T 30834-2022 Referenced Document

GB/T 10561 Standard grading chart microscopic examination method for determination of non-metallic inclusion content in steel*， 2023-05-23 Update
GB/T 13298 Inspection methods of microstructure for metals
GB/T 17359 Microbeam analysis of elements with atomic number not less than 11 and energy spectrometry for quantitative analysis*， 2023-12-28 Update
GB/T 18876.1 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
GB/T 18876.2 Standard practice for determination 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 Microbeam analysis—Scanning electron microscopy—Guidelines for calibrating image magnification
GB/T 30067 Standard terminology relating to metallography

2022 GB/T 30834-2022 Rating and classifying of inclusions in steel—Scanning electron microscope method
2014 GB/T 30834-2014 Standard test methods for rating and classifying inclusions in steel.Scanning electron microscope