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GB/T 9258.2-2025: Coated abrasives - Determination and designation of grain size distribution - Part 2: Macrogrit sizes P12 to P220
Status: Valid GB/T 9258.2: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 9258.2-2025 | English | 359 |
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Coated abrasives - Determination and designation of grain size distribution - Part 2: Macrogrit sizes P12 to P220
| Valid |
GB/T 9258.2-2025
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| GB/T 9258.2-2008 | English | 154 |
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Coated abrasives -- Grain size analysis -- Part 2: Determination of grain size distribution of macrogrits P12 to P220
| Valid |
GB/T 9258.2-2008
|
| GB/T 9258.2-2000 | English | 439 |
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Coated abrasives-Grain size analysis-Part 2: Determination of grain size distribution of macrogrits P12 to P220
| Obsolete |
GB/T 9258.2-2000
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Standard similar to GB/T 9258.2-2025 GB/T 9258.3 GB/T 50082 GB/T 9258.3 Basic data | Standard ID | GB/T 9258.2-2025 (GB/T9258.2-2025) | | Description (Translated English) | Coated abrasives - Determination and designation of grain size distribution - Part 2: Macrogrit sizes P12 to P220 | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J43 | | Classification of International Standard | 25.100.70 | | Word Count Estimation | 18,171 | | Date of Issue | 2025-08-01 | | Date of Implementation | 2026-02-01 | | Older Standard (superseded by this standard) | GB/T 9258.2-2008, GB/T 9258.1-2000 | | Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China | GB/T 9258.2-2025: Coated abrasives - Determination and designation of grain size distribution - Part 2: Macrogrit sizes P12 to P220
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ICS 25.100.70
CCSJ43
National Standard of the People's Republic of China
Replaces GB/T 9258.2-2008, partially replaces GB/T 9258.1-2000
Detection and marking of abrasive particle size composition for coated abrasives
Part 2.Coarse abrasive grains P12~P220
(ISO 6344-2.2021,MOD)
Released on August 1, 2025
Implementation on February 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
Introduction V
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4.Particle size composition of coarse abrasive particles P12~P220 1
5 Determination method of coarse abrasive particles P12~P220 2
6 Test Report 5
7 Mark 5
8 Logo 6
Appendix A (Informative) Record form for P coarse abrasive particle screening analysis results 7
Appendix B (Informative) Example of recording the results of P coarse abrasive particle screening analysis 8
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document is Part 2 of GB/T 9258 "Testing and marking of abrasive grain size composition for coated abrasives". GB/T 9258 has been
The following parts were published.
--- Part 2.Coarse abrasive particles P12 to P220;
--- Part 3.Micropowders P240 to P5000.
This document replaces GB/T 9258.1-2000 "Abrasive particle size analysis for coated abrasives Part 1.Particle size composition" and
GB/T 9258.2-2008 "Abrasive particle size analysis for coated abrasives - Part 2.Determination of particle size composition of coarse abrasive particles P12 to P220".
The document is based on GB/T 9258.2-2008 and integrates the contents related to coarse abrasive grains in GB/T 9258.1-2000.
Compared with.2008, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) The scope has been changed (see Chapter 1, Chapter 1 of the.2008 edition);
b) The terms and definitions have been changed (see Chapter 3, Chapter 3 of the.2008 edition);
c) Added a chapter on “Grit size composition of coarse abrasive grains” (see Chapter 4);
d) The provisions for P-coarse abrasive standard sand have been changed (see 5.1, 4.5 of the.2008 edition);
e) The provisions on timers have been modified (see 5.2.2, 4.2 of the.2008 edition);
f) The provisions for balances have been changed (see 5.2.3, 4.4 of the.2008 edition);
g) The provisions for checking the suitability of test sieves have been changed (see 5.3, Chapter 5 of the.2008 edition);
h) The sample preparation steps have been changed (see 5.4.1, 6.1.1 of the.2008 edition);
i) The provisions for screening of P-coarse abrasive standard sand have been changed (see 5.4.3, 6.1.3 of the.2008 edition);
j) The provisions of the test steps have been changed (see 5.5, 6.1.4 of the.2008 edition);
k) The provisions for evaluation of sieve analysis results have been modified (see 5.6, 6.2 of the.2008 edition);
l) Added test report requirements (see Chapter 6);
m) The marking provisions have been changed (see Chapter 8, Chapter 8 of the.2008 edition);
n) Modified the element attributes of the sieve analysis result recording form (see Appendix A, Chapter 9 of the.2008 edition).
This document modifies ISO 6344-2.2021 "Testing and marking of abrasive grain size composition for coated abrasives - Part 2.Coarse abrasive grains"
P12~P220”.
The technical differences between this document and ISO 6344-2.2021 and their reasons are as follows.
--- Added normative reference GB/T 16458 (see Chapter 3) to facilitate the understanding and application of the standard;
--- Changed the definition of "particle size composition" (see 3.2) to adapt to my country's technical conditions;
--- Changed the relevant content of P-coarse abrasive standard sand (see 5.1) to conform to the actual testing situation in my country;
--- ISO 9284 (see 5.2.1) is replaced by the normative reference GB/T 18845 to adapt to my country's technical conditions;
--- Changed the provisions of the timer (see 5.2.2) to improve detection accuracy;
--- Replaced ISO 3310-1 (see 5.2.4) with the normative reference GB/T 6003.1 to adapt to my country's technical conditions;
--- ISO 9138 (see 5.4.1) is replaced by the normative reference GB/T 4676 to adapt to my country's technical conditions;
--- Changed the provisions for the installation of test sieves (see 5.4.2) to conform to the actual test situation;
--- Changed the marking provisions (see Chapter 8) to conform to my country's actual situation.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Machinery Industry Federation.
This document is under the jurisdiction of the National Technical Committee for Standardization of Abrasives and Grinding Tools (SAC/TC139).
This document was drafted by. Zhengzhou Abrasives and Grinding Tools Research Institute Co., Ltd., Zibo Zichuan Jinlong Abrasives and Grinding Tools Co., Ltd., Henan Ant
Yi New Materials Co., Ltd., Yichuan County Dongfeng Abrasives and Grinding Tools Co., Ltd., Shaoxing Ziyuan Abrasives Co., Ltd., Nanping Yize Abrasives and Grinding Tools Technology
Ltd.
The main drafters of this document are Yu Jiayin, Bao Hua, Zhang Liang, Chen Hao, Zhao Zhengang, Zhao Gangqiang, Chen Senjun, Wu Jianwei, and Chen Dehai.
The previous versions of this document and the documents it replaces are as follows.
---First issued as GB/T 9258.2-2000 in.2000 and first revised in.2008;
--- This is the second revision, incorporating GB/T 9258.1-2000 "Abrasive particle size analysis for coated abrasives Part 1.Particle size analysis for coated abrasives
Contents related to coarse abrasive particles in "Composition of Degrees of Abrasives".
introduction
Due to the different requirements of grinding purpose, grinding efficiency, grinding accuracy, etc., the requirements for abrasive size are also different, so the abrasive needs to be
The abrasive is processed and graded into different particle sizes to meet different grinding requirements. This requires characterization and testing of the particle size of the abrasive and its
Row standardization.
Particle size composition is a specific characterization of abrasive particle size, which is based on the corresponding detection technology.
There are many technologies for the characterization and detection of particle size. However, due to the limitations of the technology, as well as considerations of efficiency and economy, no one technology has been successfully used.
This technology is fully applicable to the characterization and detection of all particle sizes of abrasives.
Generally, the particle size of coarser abrasives is characterized and tested based on sieving methods; the particle size of finer abrasives is characterized and tested based on sedimentation methods and other methods.
Correspondingly, the particle size of abrasives is divided into coarse abrasive particles and fine powder from coarse to fine.
GB/T 9258 "Testing and marking of abrasive grain size composition for coated abrasives" is intended to consist of two parts.
--- Part 2.Coarse abrasive grains P12~P220.The purpose is to provide the particle size characterization and detection method of coarse abrasive grains for coated abrasives.
law and specifies marking and logo requirements.
--- Part 3.Micropowders P240~P5000.The purpose is to provide the particle size characterization and detection methods of micropowder abrasives for coated abrasives, and
Specify marking and signage requirements.
Detection and marking of abrasive particle size composition for coated abrasives
Part 2.Coarse abrasive grains P12~P220
1 Scope
This document specifies the determination or test method for the grit composition of coarse abrasive particles P12 to P220 for coated abrasives.
This document applies to abrasives used in the manufacture of coated abrasives and abrasives recovered from coated abrasives for testing purposes.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 4676 Sampling Methods for Common Abrasives (GB/T 4676-2018, ISO 9138.2015, MOD)
GB/T 6003.1 Test sieves - Technical requirements and inspection - Part 1.Wire mesh test sieves (GB/T 6003.1-
2022, ISO 3310-1.2016, MOD)
GB/T 16458 Terminology of Abrasives and Grinding Tools
GB/T 18845 Abrasive Sieving Tester (GB/T 18845-2017, ISO 9284.2013, MOD)
JB/T 6569 Packaging of general abrasives
3 Terms and Definitions
The terms and definitions defined in GB/T 16458 and the following apply to this document.
3.1
Coarse abrasive macrogrit
Abrasive particles with a particle size of 3.35 mm to 0.053 mm and a particle size composition (3.2) determined by sieving method.
3.2
The mass fraction of abrasive particles of different sizes in a certain particle size number.
[Source. GB/T 16458-2021, 3.1.5.2]
4.Particle size composition of coarse abrasive particles P12~P220
The particle size composition of the coarse abrasive particles (P12 to P220) is determined by sieving using a set of test sieves specified in Table 1.
When the amount meets the limit value in Table 1, the particle size composition is qualified.
According to Chapter 5, the coarse abrasive grains shall be screened by comparing the P-coarse abrasive grain standard sand (see 5.1) and the coarse abrasive grain sample on the same test sieve.
Detection of abrasive particle size composition.
The particle size composition of coarse abrasive particles should meet the following criteria.
a) All abrasive particles should pass through the first test sieve, i.e. the oversize Q1=0;
b) The sum of the material on the first and second test sieves, Q2, shall not exceed the specified maximum value, Q2max;
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