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GB/T 42671-2023 English PDF (GBT42671-2023)

GB/T 42671-2023 English PDF (GBT42671-2023)

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GB/T 42671-2023: Test method for surface roughness of carbon materials

This document describes the principle, instrument and equipment, specimens, test procedures and test report of the test method for surface roughness of carbon materials. This document is applicable to the evaluation of surface roughness of carbon material products with aggregate particles less than 1.6 mm through the stylus profile method. Generally, the arithmetical mean deviation of profile (Ra) is selected as the measurement parameter, and other parameters, for example, maximum height of profile (Rz), can also be selected as needed. Other carbon materials may take this as a reference.
GB/T 42671-2023
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 29.050
CCS Q 52
Test Method for Surface Roughness of Carbon Materials
ISSUED ON: AUGUST 6, 2023
IMPLEMENTED ON: MARCH 1, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the PEOPLE Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Principle ... 6
5 Instruments and Equipment ... 6
6 Specimens ... 7
7 Test Procedures ... 7
8 Test Report ... 8
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives for Standardization - Part 1: Rules for the Structure and Drafting of Standardizing Documents. Please be noted that certain content of this document may involve patents. The institution issuing this document does not undertake the responsibility of identifying these patents. This document was proposed by China Iron and Steel Association.
This document shall be under the jurisdiction of National Technical Committee on Steel of Standardization Administration of China (SAC/TC 183).
The drafting organizations of this document: SINOSTEEL New Materials Co., Ltd.; Shanghai Research Institute of Materials Co., Ltd.; China Metallurgical Information and Standardization Institute.
The main drafters of this document: Yang Hui, Xu Jianping, Wang Xiaoyuan, Mao Yuzhen, Wang Wendong, Wu Jie, Zhang Chao, Wang Yanlong, Yuan Zhougang, Lei Shaoyu. Test Method for Surface Roughness of Carbon Materials
1 Scope
This document describes the principle, instrument and equipment, specimens, test procedures and test report of the test method for surface roughness of carbon materials. This document is applicable to the evaluation of surface roughness of carbon material products with aggregate particles less than 1.6 mm through the stylus profile method. Generally, the arithmetical mean deviation of profile (Ra) is selected as the measurement parameter, and other parameters, for example, maximum height of profile (Rz), can also be selected as needed. Other carbon materials may take this as a reference.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document through the normative references in the text. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. GB/T 6062 Geometrical Product Specifications (GPS) - Surface Texture: Profile Method - Nominal Characteristic of Contact (stylus) Instruments
GB/T 8170 Rules of Rounding off for Numerical Values and Expression and Judgement of Limiting Values
3 Terms and Definitions
The following terms and definitions are applicable to this document.
3.1 roughness profile
The profile formed by applying a profile filter to the original profile to suppress the long-wave components.
3.2 sampling length
lr
The length of determining the irregular characteristics of the profile being evaluated in the direction of measurement.
3.3 evaluation length

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