GB/T 39520-2020 English PDFUS$279.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 39520-2020: (X-ray diffraction test method for spring residual stress) Status: Valid
Basic dataStandard ID: GB/T 39520-2020 (GB/T39520-2020)Description (Translated English): (X-ray diffraction test method for spring residual stress) Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: J26 Word Count Estimation: 15,130 Date of Issue: 2020-11-19 Date of Implementation: 2021-06-01 Regulation (derived from): National Standard Announcement No. 26 of 2020 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 39520-2020: (X-ray diffraction test method for spring residual stress)---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.(X-ray diffraction test method for spring residual stress) ICS 21.160 J26 National Standards of People's Republic of China X-ray diffraction test method for spring residual stress 2020-11-19 released 2021-06-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed and managed by the National Spring Standardization Technical Committee (SAC/TC235). Drafting organizations of this standard. Zhejiang Meili Technology Co., Ltd., China Machinery Productivity Promotion Center, Shanghai Jiaotong University School of Materials, Shanghai China Spring Manufacturing Co., Ltd., Hangzhou Xingfa Spring Co., Ltd., Dongfeng Motor Suspension Spring Co., Ltd., Fawer Liaoning Automobile Spring Co., Ltd. Company, Guangzhou Huade Automobile Spring Co., Ltd., Handan Asta Stress Technology Co., Ltd., Zhejiang Jinchang Spring Co., Ltd., Huawei Technology Co., Ltd., Zhejiang Funiu Leaf Spring Co., Ltd., Shandong Lianmei Spring Technology Co., Ltd., CRRC Guiyang Vehicle Co., Ltd., Jiangxi Changli Fangda Auto Parts Co., Ltd., Shandong Auto Spring Factory Zibo Co., Ltd., Jiangsu Dongfang Zhonglian Industrial Technology Co., Ltd., Wuxi Zegen Spring Co., Ltd., Taizhou Yongzheng Auto Parts Co., Ltd. The main drafters of this standard. Nie Lun, Cheng Peng, Jiang Chuanhai, Zhou Chuntao, Jiang Guoyan, Chen Weifeng, Liu Fuqiang, Lu Wei, Lu Kemao, Fei Qingmin, Fang Zhou, Wu Jianming, Mu Bo, Ma Yongtao, Wu Huiming, Zhang Yunshan, Wang Yadong, Wu Liangliang, Li Songhuo, Hui Endong. X-ray diffraction test method for spring residual stress1 ScopeThis standard specifies the use of X-ray diffraction principles to detect springs (coil springs, leaf springs and stabilizers, hereinafter referred to as "springs"). The method of sample residual stress, including the source and classification of spring residual stress, X-ray stress test principle and method, instrument, procedure, number According to processing, test uncertainty and test report. This standard applies to the residual stress test of springs made of ferrite, pearlite, bainite, martensite and austenitic steels. Other springs can be used as reference.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document. GB/T 1805 Spring term GB/T 7704 Non-destructive testing X-ray stress determination method JB/T 9394 Non-destructive testing equipment X-ray stress tester technical conditions3 Terms and definitionsThe terms and definitions defined in GB/T 1805 and GB/T 7704 apply to this document.4 symbolsThe following symbols apply to this document. A. Absorption factor d0.Interplanar spacing of the material in an unstressed state dϕΨ. The distance between the crystal planes in the direction defined by the ϕ and Ψ angles {hkl}. A family of crystal planes with crystal plane index (hkl) (L1, L2, L3). laboratory coordinate system LP. Lorentz polarization factor Z. X-ray penetration depth β. Integral width, that is, the ratio of the integrated area to the maximum intensity after the diffraction peak is removed from the background irrelevant to the Bragg diffraction εϕΨ. strain in the direction defined by the ϕ and Ψ angles θ. Bragg angle, 1/2 of the diffraction angle 2θ, that is, the angle between the incident X-ray or diffraction line and the diffraction crystal plane σ. Normal stress in the direction of ϕ angle σii. normal stress component (i=1,2,3) ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 39520-2020_English be delivered?Answer: Upon your order, we will start to translate GB/T 39520-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 39520-2020_English with my colleagues?Answer: Yes. 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