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JJG 1147-2018 English PDFStandard Briefing:Stadard ID: JJG 1147-2018Stadard Title: Charpy V-notch Reference Test Pieces Price (USD): 329 Lead day (Deliver True-PDF English version): 3 days Status: Valid
Basic Data:
Contents, Scope, and Excerpt:JJG 1147-2018 (Charpy V-notch standard impact test procedure) National Metrology Verification Regulations of the People's Republic Charpy V-notch standard impact test specimen Published on.2018-02-27 2018-05-27 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Charpy V-notch standard impact test specimen Verification procedure Focal Point. National Strength Hardness Measurement Technical Committee Main drafting unit. Beijing Institute of Metrology and Measurement Science Iron and Steel Research Institute Participated in the drafting unit. National Defense Science and Technology Industry 5011 Level Metering Station This regulation entrusts the National Force Value Hardness Measurement Technical Committee to explain The main drafters of this procedure. Luo Wei Beijing Institute of Metrology and Measurement Science Chen Long Beijing Institute of Metrology and Measurement Science Chen Wu Iron and Steel Research Institute Participate in the drafters. Wang Chunhua Iron and Steel Research Institute Cao Jiuda National Defense Technology Industry 5011 Level Metering Station table of Contents Introduction (II) 1 range (1) 2 References (1) 3 terms and units of measurement (1) 3.1 Terminology (1) 3.2 Symbols and descriptions (1) 4 Overview (1) 5 Metrological performance requirements (2) 5.1 Standard energy range and allowable standard deviation (2) 5.2 Very poor hardness value (2) 6 General technical requirements (2) 6.1 Standard specimen geometry (2) 6.2 Other requirements for standard specimens (3) 7 Measuring instrument control (3) 7.1 Verification conditions (3) 7.2 Verification project (3) 7.3 Verification method (4) 8 Processing of verification results (5) 9 verification period (5) Appendix A Format of the Certificate/Verification Result Notice (6) Appendix B Verification Record (7) introduction This procedure is drafted in accordance with the rules given in JJF1002-2010 “Rules for the preparation of national metrological verification procedures”. This procedure is the first release. Charpy V-notch standard impact test methodScopeThis procedure is applicable to the first verification of standard impact specimens used for verification by pendulum impact testers. 2 reference files This procedure refers to the following documents. JJG 145 pendulum impact tester JJG 2077 pendulum impact energy measuring instrument verification system table General Principles and Statistical Principles of JJF1343 Standard Substances GB/T 18658 Pendulum Impact Tester for Charpy V-notch Standard Test For dated references, only the dated version applies to this Code; any undated quotation The latest version (including all amendments) applies to this procedure. 3 terms and units of measure 3.1 Terminology 3.1.1 pendulum impact benchmark machine pendulumimpactprimarystandardmachine A test machine for determining the standard energy of a standard impact test. 3.1.2 Absorbing energy absorbedenergy The total energy required to break the specimen when tested with a testing machine. It is equal to the potential energy of the pendulum in the initial position and test The difference in potential energy at the first half of the cycle after the fracture. 3.1.3 standard energy referenceenergy Charpy V-notch standard impact sample energy absorption value. 3.2 Symbols and instructions The symbols, units and descriptions used in this procedure are shown in Table 1. Table 1 Symbols, units and descriptions Symbol unit description Average value of KR J sample on the benchmark KR J Charpy V-type standard impact specimen standard energy value Ki J measurement results of the i-th sample n 1 number of measured samples s J Standard deviation of measurement results on the reference unit 4 Overview Charpy V-notch standard impact test specimen (hereinafter referred to as standard test specimen) is used for the pendulum impact test machine ...... |