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GB/T 38877-2020 English PDF

GB/T 38877-2020 (GB/T38877-2020, GBT 38877-2020, GBT38877-2020)
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GB/T 38877-2020English110 Add to Cart 0--9 seconds. Auto-delivery Insulating coatings for the electrical steel strip(sheet) Valid GB/T 38877-2020
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BASIC DATA
Standard ID GB/T 38877-2020 (GB/T38877-2020)
Description (Translated English) Insulating coatings for the electrical steel strip(sheet)
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H53
Classification of International Standard 77.140.40
Word Count Estimation 10,149
Date of Issue 2020-06-02
Date of Implementation 2020-12-01
Drafting Organization Wuhan Iron and Steel Co., Ltd., Metallurgical Industry Information Standards Institute, Anshan Iron and Steel Co., Ltd., Baoshan Iron and Steel Co., Ltd., Shougang Group Co., Ltd., Wuhan Gangshigang Fucai New Product Technology Co., Ltd., Shanxi Seikede Technology Co., Ltd., Shanghai Zhen Tai New Material Development Group Co., Ltd., Hubei Wuzhou New Material Technology Co., Ltd.
Administrative Organization National Steel Standardization Technical Committee (SAC/TC 183)
Proposing organization China Iron and Steel Association
Issuing agency(ies) State Administration for Market Regulation, National Standardization Administration


GB/T 38877-2020 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.40 H 53 Insulating coatings for the electrical steel strip (sheet) ISSUED ON: JUNE 02, 2020 IMPLEMENTED ON: DECEMBER 01, 2020 Issued by: State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of Contents Foreword ... 3  1 Scope ... 4  2 Normative references ... 4  3 Terms and definitions ... 5  4 Classification and code ... 5  5 Testing items and test methods ... 7  Annex A (informative) Classification and code comparison of coatings at home and abroad ... 9  Bibliography ... 10  Insulating coatings for the electrical steel strip (sheet) 1 Scope This Standard specifies the terms and definitions, classification and code, testing items and test methods of insulating coatings for the electrical steel strip (sheet). This Standard is applicable to the insulating coating that is formed by coating on the surface of cold-rolled electrical steel strip (sheet) and surface oxidation through inorganic components, organic components and their compound preparation. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 1733, Determination of resistance to water of films GB/T 2522, Magnetic sheet and strip-Methods of measurement of interlamination resistance and lamination factor and coat adhesiveness GB/T 6739, Paints and varnishes - Determination of film hardness by pencil test GB/T 9274, Paints and varnishes - Determination of resistance to liquids GB/T 9286, Paints and varnishes - Cross cut test for films GB/T 10125, Corrosion tests in artificial atmospheres - Salt spray tests GB/T 13501, Test methods for insulation compatibility of electric motors for hermetic refrigeration compressors GB/T 20831, Methods of assessment of temperature capability of inter laminar insulation coatings of electrical sheet and strip 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 insulating coatings for the electrical steel strip (sheet) a coating that in order to prevent or reduce the short circuit between the core laminations and increase the eddy current loss, a layer of insulating properties is coated on the surface of the cold-rolled electrical steel strip (sheet) 3.2 coated insulation resistance when applying a certain DC voltage to the surface of the cold-rolled electrical steel strip (sheet) coating, the resistance corresponding to the current flowing through the coating NOTE: Coated insulation resistance is divided into surface insulation resistance (Ω·mm2/face) and interlayer resistance (Ω·mm2/sheet). 4 Classification and code The code of insulating coatings for the electrical steel strip (sheet) is composed in the order given below. The classification and code of the insulating coating are shown in Table 1. Refer to Annex A for domestic and foreign coating classification and code comparison. Example: DJ-3-Z indicates that the type of insulating coating for the electrical steel strip (sheet) is 3, with high surface insulation resistance, which can greatly improve the punching performance of the steel strip. Table 1 – Classification and description of insulating coatings for the electrical steel strip (sheet) Coating classification and code Description Characteristic code (if any) used by coating, expressed in English letters Code of coating type, expressed in numbers Chinese Pinyin initials of “Dian” (electricity) and “Jue” (insulating) in "insulating coatings for the electrical steel strip (sheet)" ......