hardness test —. Part 1: Test method. Matériaux métalliques — Essai de dureté Vickers —. Partie 1: Méthode d’essai. STANDARD. ISO. Fourth edition. Purchase your copy of BS EN ISO as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards. I.S. EN ISO is the adopted Irish version of the European . The text of ISO has been approved by CEN as EN ISO.
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ISO ： 金属维氏硬度试验 第一部分：试验方法 – MBA智库文档
No deformation shall be visible at the back of the test piece after the test. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Your reading intentions are also stored in your profile for future reference. There is no general process of accurately converting Vickers hardness into other scales of hardness or into tensile strength.
The finish of the surface shall permit accurate determination of the diagonal length of the indentation. The correction factors are tabulated in terms of the ratio of the mean diagonal d of the indentation to the diameter D of the sphere.
The Amber document status indicator indicates that some caution is needed when isso this document – it is either: Ihre Klassifizierung und Auswirkung auf iwo Messwerte. Independent of the type of sources, for hardness there are two possibilities for the determination of the uncertainty. Here’s an example of what they look like: It is strongly recommended that this procedure be applied for a maximum of one year after the successful passing of a direct verification.
Setting up reading intentions help you organise your course reading.
Because of this approach, it is important that the individual machine components are operating within the tolerances. Document Status Indicators The Green document status indicator indicates that the document is: The measured dimension should agree with the certified value to within the maximum permissible error given in Table 5 of ISO If the difference is greater, this shall be stated in the test report. HV 2,5 24,52 N may be 65071. Their committees work with the manufacturing and service industries, government, enn and consumers to facilitate the production of British, European and International standards.
If two adjacent indentations differ in size, the spacing shall be based on the mean diagonal length of the larger indentation.
The duration of the test force shall be 10 s to 15 s, except for tests on materials whose time-dependent properties would make this an unsuitable range. This is the base of M2. It makes it easy to scan through your lists and keep track of progress.
BS EN ISO 6507-1:2018
Type Document Web address https: The arithmetical mean of the two readings shall be taken for the calculation of the Vickers hardness. Reference number ISO In downloading this file, parties accept therein the responsibility of not infringing Adobe’s licensing policy. The correction factors are tabulated in terms of the ratio of the mean diagonal d of the indentation to the diameter D of the cylinder.
The chain starts at the international level using international definitions of the various hardness scales to carry out international intercomparisons. Werkstofftechnik 4pp. Details of the software products used to create this PDF file can be found in the General Info relative to the 66507-1 the PDF-creation parameters were optimized for printing.
The error is no longer in the calculation of the uncertainty but all determined hardness values have to be corrected by b or Ucorr has to be increased by b.
In accordance with Adobe’s licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing.
BS EN ISO – Metallic materials. Vickers hardness test. Test method
NOTE There is evidence that some materials may be sensitive to the rate of straining which causes small changes in the value of the yield strength. Care should be taken, if standard uncertainties of type A and B are summarised, that the contributions are not counted twice see Clause 4 of GUM: The time from the initial application of the force until the full test force is reached shall not be less uso 2 s nor greater than 8 s.
Specifies the Vickers hardness test method, for the three different ranges of test force for metallic materials. Test method 1 Scope This part of ISO ios the Vickers hardness test method, for the three different ranges of test force for metallic materials see Table 1. It is important that the test piece lies firmly on the support so 6570-1 displacement cannot occur during the test.
What are reading intentions? Such conversions, therefore, should be avoided, unless a reliable basis for conversion can be obtained by comparison tests. NOTE Other values e. NOTE 2 In general, decreasing the test force increases the scatter of results of the measurements.