YS/T 668-2020 English PDFUS$279.00 ยท In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. YS/T 668-2020: (Sampling methods for physical and chemical testing of copper and copper alloys) Status: Valid YS/T 668: Historical versions
Basic dataStandard ID: YS/T 668-2020 (YS/T668-2020)Description (Translated English): (Sampling methods for physical and chemical testing of copper and copper alloys) Sector / Industry: Nonferrous Metallurgy Industry Standard (Recommended) Classification of Chinese Standard: H13 Word Count Estimation: 13,118 Date of Issue: 2020-12-09 Date of Implementation: 2021-04-01 Older Standard (superseded by this standard): YS/T 668-2008 Regulation (derived from): Ministry of Industry and Information Technology Announcement No. 48 (2020) Issuing agency(ies): Ministry of Industry and Information Technology YS/T 668-2008: The sampling method of physical and chemical testing for 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. The sampling method of physical and chemical testing for copper and copper alloys ICS 77.120.99 H13 People's Republic of China Nonferrous Metals Industry Standard Copper and copper alloy physical and chemical detection sampling method Posted 2008-03-12 2008-09-01 implementation National Development and Reform Commission issued ForewordThis standard by the National Standardization Technical Committee of non-ferrous metals and centralized. The standard by Chinalco Luoyang Copper Co., Ltd. is responsible for drafting. The main drafters of this standard. Zhang Jinghua, Pan Chun Road, Qin Shuping, Isabelle Xia, Li Xianghai, Wang Yongxiang, Wei thin, Menghui Juan, Yang Lijuan. Copper and copper alloy physical and chemical detection sampling method1 ScopeThis standard specifies the chemical composition of copper and copper alloy melting and casting, and processed products, mechanical properties, process performance, physical and chemical properties Performance analysis of the test sample general requirements for sampling, location, number, size and sample preparation. This standard applies to copper and copper alloy melting and casting and machining products chemical composition, mechanical properties, process performance, physical properties and chemical resistance Pre-selection and preparation of test samples can be analyzed.2 General requirementsGeneral requirements 2.1 chemical composition testing sample Chemical composition 2.1.1 for copper and copper alloy melting analysis and product analysis samples should be representative of the copper solution or copper mining site take. Specimens should be uniform, fully representative of each batch or melt times, and should have a sufficient quantity to meet the requirements analysis of the project. 2.1.2 Prior to sampling, samples should be clean, rust-free skin, dirt and other debris. If necessary, the sample can be used such as acetone wash, rinse and then alcohol Wash, then dry. Rust scale, dirt available suitable mechanical or chemical means to remove. 2.1.3 chemical composition assay sample cuttings, you can drill, dig or take some mechanism to take tools, sampling using saws, drills, milling cutters or other The tool should be cleaned before use, the sampling rate should be controlled in order to prevent overheating and oxidation of the sample. When sampling system dust, not water, oil, or Other lubricants. 2.1.4 chemical composition assay specimens prior to use should be based on the requirements of analytical instruments, is made with a lathe or milling machine has a taper or Sufficient area and having some kind of surface finish. 2.2 General requirements for mechanical and technological performance testing sample 2.2.1 Sampling should be on the look and size of qualified products. Blank samples should be of sufficient size to ensure the machining of qualified samples Test requirements. Sampling, should prevent overheating, hardening, deformation and affect its mechanical properties or process performance. Blank samples may not have slag, Folds, burrs, cracking and other defects. 2.2.2 Sampling, sample blank response be marked to ensure that the position and orientation has always been able to identify samples. 2.2.3 sampling direction, the number of product should follow the standard or both parties of the agreement, when there is no clearly defined, shall be taken in any of the two specimens in each batch Thus, doubling the number of repeat tests. Sampling direction transverse tensile sheet, strip, foil, tube, rod, wire drawing sample longitudinal direction. 2.2.4 for sheet, strip and foil, cut out the blank sample should maintain its original surface is not damaged. Cut wire and sheet (with) wood from the coil When the blank sample, can be straightening and leveling, but it should not change its original cross-sectional shape and mechanical properties of materials and processes. Except for the elongation The sample may, without straightening, straightening like blank when needed, unless otherwise specified in the product standard, should be carried out in the cold state. 2.2.5 pipe, rod-like billet end face shall be perpendicular to the axis. 2.3 General requirements for physical and chemical performance test sample 2.3.1 ingot macrostructure detection sample is generally taken at the gates, at the end of the product processed products are generally taken. 2.3.2 Sample grain size must be detected from the soft state (completely recrystallized) product sampling. 2.3.3 Sample Double Bridge assay coefficient of resistance should be straight, uniform cross-section, without burr, flash, crimping, creasing and other scissors defect. Conductivity detection sample 2.3.4 eddy current method should be no ferromagnetic sample surface smooth, scale, paint, coating corrosion spots and the like. 2.3.5 Residual Stress specimen shall squash, scratch, crushing, peeling, wrinkles and other defects, when cut the sample, without clamping, and other man-made break Additional stress.3 Chemical composition testing sample3.1 heat analysis sample 3.1.1 Number of samples Unless otherwise provided in both supply and demand, as from 1 batch number of samples should be selected. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of YS/T 668-2020_English be delivered?Answer: Upon your order, we will start to translate YS/T 668-2020_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 YS/T 668-2020_English with my colleagues?Answer: Yes. 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Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version YS/T 668-2020 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
