GB/T 2480-2022 English PDF (GBT2480-2022)

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GB/T 2480-2022: Conventional abrasive - Silicon carbide
GB/T 2480-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 25.100.70
CCS J 43
Replacing GB/T 2480-2008
Conventional abrasive - Silicon carbide
ISSUED ON: MARCH 9, 2022
IMPLEMENTED ON: OCTOBER 1, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Grades ... 5
5 Technical requirements ... 6
6 Test methods ... 8
7 Inspection rules ... 9
8 Packaging, marking, transportation, and storage ... 9
Foreword
This document was drafted in accordance with the provisions of GB/T 1.1-2020
Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents.
This document replaces GB/T 2480-2008 Conventional abrasive - Silicon carbide.
Compared with GB/T 2480-2008, except for the structural adjustment and editorial
revisions, the main technical changes are as follows:
a) The scope of application is changed (see Chapter 1; see Chapter 1 of the 2008
edition);
b) The grades are changed (see Chapter 4; see Chapter 3 of the 2008 edition);
c) The chemical composition indexes are changed (see 5.1; see 4.1 of the 2008
edition);
d) The density indexes are changed (see 5.3; see 4.2 of the 2008 edition);
e) The magnetic substance content indexes are changed (see 5.5; see 4.5 of the
2008 edition);
f) The content of J-series abrasive fine powder is added (see 5.1, 5.3, and Table
3);
g) The requirements for marking, transportation, and storage are added (see
Chapter 8).
Please note that some of the contents of this document may involve patents. The issuing
agency of this document is not responsible for identifying patents.
This document was proposed by China Machinery Industry Federation.
This document shall be under the jurisdiction of the National Technical Committee on
Abrasives of Standardization Administration of China (SAC/TC139).
Drafting organizations of this document: White Dove Abrasives Co., Ltd., Zigong
Fengrui Abrasive Co., Ltd., Shandong Guanhua New Materials Co., Ltd., Pingdingshan
Yicheng New Material Co., Ltd., China Machinery Industry International Cooperation
Co., Ltd.
The main drafters of this document: Chen Deguang, Chang Yanli, Wu Meng, Wang
Xueqiang, Lv Chunchang, Xia Xuefeng, Li Hang, Su Yan.
The previous versions of the documents replaced by this document are as follows:
Conventional abrasive - Silicon carbide
1 Scope
This document specifies the grade, technical requirements, test methods, inspection
rules, packaging, marking, transportation, and storage of silicon carbide abrasives.
This document applies to silicon carbide abrasives for manufacturing bonded abrasive
tools, coated abrasive tools, and for free grinding, polishing, and cutting.
2 Normative references
The following documents contain the provisions which, through normative reference in
this document, constitute the essential provisions of this document. For the dated
referenced documents, only the versions with the indicated dates are applicable to this
document; for the undated referenced documents, only the latest version (including all
the amendments) is applicable to this document.
GB/T 2481(all parts) Bonded abrasives - Determination and designation of grain
size distribution
GB/T 3045 Conventional abrasive - Chemical analysis of silicon carbide
GB/T 4676 Abrasive grains - Sampling and splitting
GB/T 9258(all parts) Coated abrasives - Grain size analysis
JB/T 6569 Conventional abrasive - Packing
JB/T 6570 Conventional abrasive - Testing method for magnetic materials
JB/T 11433 Conventional abrasive - Determination of density
3 Terms and definitions
There are no terms and definitions that need to be defined in this document.
4 Grades
The grades of silicon carbide abrasives are specified as follows: