JC/T 2268-2014 (JC/T 2268-2023 Newer Version) PDF English
JC/T 2268-2014 (JC/T2268-2014, JCT 2268-2014, JCT2268-2014)
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| JC/T 2268-2023 | English | 269 |
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(Method for determination of copper and other elements in brake friction materials)
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| JC/T 2268-2014 | English | 135 |
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Measurement of copper and other elements in brake friction materials
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Newer version: JC/T 2268-2023 Standards related to (historical): JC/T 2268-2023
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JC/T 2268-2014: PDF in English (JCT 2268-2014) JC/T 2268-2014
JC
BUILDING MATERIAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.40
Q 69
Record No.. 47777-2014
Measurement of Copper and Other
Elements in Brake Friction Materials
ISSUED ON. OCTOBER 14, 2014
IMPLEMENTED ON. APRIL 1, 2015
Issued by. Ministry of Industry and Information Technology of the
People’s Republic of China
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Sample Preparation ... 4
4 Analytical Method ... 7
Appendix A (Informative) Automobile Brake Evaluation Standard ... 8
Measurement of Copper and Other
Elements in Brake Friction Materials
1 Scope
This Standard specifies methods of sample preparation and analysis for the
determination of copper and other elements in brake friction materials.
This Standard is applicable to brake friction materials that have not been used.
2 Normative References
The following documents are indispensable to the application of this Standard. In terms
of references with a specified date, only versions with a specified date are applicable
to this Standard. The latest version (including all the modifications) of references
without a specified date is applicable to this Standard.
GB 5085.3-2007 Identification Standards for Hazardous Wastes - Identification for
Extraction Toxicity
GB/T 15555.1 Solid Waste - Determination of Total Mercury - Cold Atomic
Absorption Spectrometry
GB/T 15555.4 Solid Waste - Determination of Chromium (VI)-1,5 -
Diphenylcarbohydrazide Spectrophotometric Method
GB/T 23942 Chemical Reagent - General Rules for Inductively Coupled Plasma
Atomic Emission Spectrometry
GB/T 23946 Inorganic Chemicals for Industrial Use - General Method for the
Determination of Lead Content - Atomic Absorption Spectrometry
3 Sample Preparation
3.1 Sample Acquisition
3.1.1 Use wool-free paper (for example, thin and soft water-absorbing paper) to wipe
the whole friction assembly. If necessary, repeatedly wipe it, so as to guarantee that
there is absolutely no dust or foreign substance on the assembly. Moreover, use
deionized water to rinse the assembly, then, use wool-free paper to absorb water.
3.1.2 Measure the thickness of friction material. If there is no steel-back or hoof-iron,
Appendix A
(Informative)
Automobile Brake Evaluation Standard
A.1 Type “A” Designated Material
“A + production-year” designated material refers to material whose content of heavy
metal and asbestos fiber, which is determined in accordance with this Standard, shall
be lower than the requirement in Table A.1.
A.2 Type “B” Designated Material
“B + production-year” designated material refers to material which satisfies the
requirement “A”; the copper content, which is determined in accordance with this
Standard, shall be lower than 5% of the requirement. Please refer to Table A.1.
A.3 Type “N” Designated Material
“N + production-year” designated material refers to material which satisfies the
requirement “A”; the content of copper and other compounds, which is determined in
accordance with this Standard, shall be lower than 0.5% of the requirement. Please
refer to Table A.1.
Table A.1 -- Content Requirement of Designated Material
Example 1. material “A15” refers to the material, which is produced in 2015 and satisfies
the requirement of Type “A” designated material.
Example 2. material “B16” refers to the material, which is produced in 2016 and satisfies
the requirement of Type “B” designated material.
Chemical Elements Material “A” Material “B” Material “N”
Chromium and
Compound/%
Hexavalent Chromium
Salt/%
Lead and
Compound/%
Mercury and
Compound/%
Asbestos Fiber/%
Copper and
Compound/%
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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