GB/T 32791-2016 English PDFUS$159.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 32791-2016: Electromagnetic (eddy-current) examination method for electrical conductivity of copper and copper alloys Status: Valid
Basic dataStandard ID: GB/T 32791-2016 (GB/T32791-2016)Description (Translated English): Electromagnetic (eddy-current) examination method for electrical conductivity of copper and copper alloys Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H21 Classification of International Standard: 77.040.99 Word Count Estimation: 8,850 Date of Issue: 2016-08-29 Date of Implementation: 2017-07-01 Regulation (derived from): National Standard Announcement 2016 No.14 Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China GB/T 32791-2016: Electromagnetic (eddy-current) examination method for electrical conductivity of copper and copper alloys---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Electromagnetic (eddy-current) examination method for electrical conductivity of copper and copper alloys ICS 77.040.99 H21 National Standards of People's Republic of China Copper and copper alloy conductivity vortex test method Electromagnetic (eddy-current) examinationmethodfor 2016-08-29 released 2017-07-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released ForewordThis standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed by China Nonferrous Metals Industry Association. This standard is owned by the National Committee for the Standardization of Nonferrous Metals (SAC/TC243). The drafting unit of this standard. Zhongluo Luoyang Copper Co., Ltd., Foshan Huahong Copper Tube Co., Ltd., Anhui Xinke New Material Co., Ltd. Division, the national copper and aluminum smelting and processing of product quality supervision and inspection center, Ningbo Xingtai Shengtai Group Co., Ltd., Anhui Chujiang Science and Technology New Materials Co., Ltd., Taiyuan Jinxi Chunlei Copper Co., Ltd., Suzhou Nonferrous Metal Research Institute Co., Ltd. The main drafters of this standard. Li Xianghai, Lin Guoliang, Lou Dongge, Wang Shidong, Han Yi, Jia Zhijun, Gu Fengxian, Ge Xiaonui, Mao Yaodong, Gao Yuhong, Yuan Hefeng, Wang Dongya, Mei Guilin, Hu Yong, Chang Fen, Zheng Xiaoying. Copper and copper alloy conductivity vortex test method1 ScopeThis standard specifies the principle, terminology and definition of the conductivity of copper and copper alloys by eddy current method, test requirements, operating methods and tests report. This standard applies to the use of eddy current conductivity tester for ferromagnetic copper and copper alloy materials or products for conductivity testing.2 principle of the methodWhen the coil carrying the alternating current (also known as the probe) is close to the surface of the conductive material, due to the effect of the alternating magnetic field of the coil, Near-surface induction of the spiral current is called eddy current. The eddy current in the material also produces its own magnetic field reaction to the coil, which is counterproductive Small and the material surface and near the surface of the conductivity. The conductivity of non-ferromagnetic conductive materials can be directly detected by a vortex conductor.3 terms and definitionsThe following terms and definitions apply to this document. 3.1 Volume resistivity volumespecificalresistance Resistance coefficient Unit cross-sectional area, unit length Metal conductor resistance (referred to as resistivity), in ohms square millimeters per meter (Ω · mm2/m). 3.2 Volume conductivity volumeelectricconductivity Conductivity coefficient The reciprocal of the volume resistivity (referred to as conductivity) in meters per meter (MS/m). 3.3 Conductivity The percentage of the ratio of the conductivity of a sample to a standard value. Note. The correspondence between conductivity, conductivity and resistance coefficient is given in Appendix A. 3.4 Eddy-current Due to the external magnetic field has time and space changes in the conductive material on the surface and near the surface of the induced current. 3.5 Standard penetration depth standarddepthofpenetration In eddy current testing, the eddy current density decreases to 1/e (about 37%) of the eddy current density on the sample surface. Standard penetration depth calculation See equation (1). δ = 503.3 ρ/(μr · f) (1) ...... |
