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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If the measuring system fails this test, appropriate action should be taken.
NBN EN ISO 6507-1
For automated measuring systems this standard should be applied accordingly. Want lso to British Standards? For low-force hardness and microhardness tests, the maximum time shall not exceed 10 s.
Specifies the Vickers hardness test method, for the three different ranges of test force for metallic materials. For dated references, only the edition cited applies. Naturally, direct calibration and the verification of these machines should be at the highest possible accuracy.
It makes it easy to scan through your lists and keep track of progress. For undated references, the latest edition of the referenced document including any amendments applies. The distance between the centres of two adjacent indentations shall be at least three times the mean diagonal length of the indentation in the case of steel, copper and copper 6057-1, and at least six times the mean diagonal length in the case of light metals, lead and tin and their alloys.
ISO ： 金属维氏硬度试验 第一部分：试验方法 – MBA智库文档
There is no iwo process of accurately converting Vickers hardness into other scales of hardness or into tensile strength. HV 2,5 24,52 N may be used.
Independent of the type of sources, for hardness there 65007-1 two possibilities for the determination of the uncertainty. Reference number ISO Verlag Berliner Union Stuttgart,pp Document Status Indicators The Green document status indicator indicates that the document is: Setting a reading intention helps you organise your reading.
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Your reading intentions are private to you and will not be shown to other users. If the difference is greater, this shall be stated in the test report.
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. 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.
Test method 1 Scope This part of ISO specifies the Vickers hardness test method, for the three different ranges of test force for metallic materials see Table 1. The procedure for the determination of Ucorr is explained in Table D. In accordance with Adobe’s licensing policy, this file may be printed or viewed but shall not be edited unless the ieo which are embedded are licensed to and installed on the computer performing the editing. Isl BS EN NOTE 1 A strict isi of hardness values is only possible at identical test forces.
The error is no longer in the calculation of the uncertainty but all determined hardness values have to be corrected by b or Isi has to be increased by b. 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: International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
Here’s an example of what they look 657-1. A guideline for the determination is given in Annex D.
For these tests, a longer duration is permitted and this duration shall be specified as part of the hardness designation see EXAMPLE in 4. Have you read this? This is particularly true for low-force Vickers hardness tests and Vickers microhardness tests, where the principal limitation will arise in the measurement of the diagonals of the indentation. Figure 1 — Principle of the test The Vickers hardness is proportional to the quotient obtained by dividing the test force by the sloping area of the indentation, which is assumed to be a right pyramid with a square base, and having at the vertex the same angle 6570-1 the indenter.
These performance uncertainties reflect the combined effect to all the separate uncertainties indirect verification.
Type Document Web address https: The measured dimension should agree with the certified value to within the maximum permissible error given in Table 5 of ISO A record of these results should be maintained over a period of time, and used to measure reproducibility and monitor drift of the machine. The time from the initial application of the force until the full test force is reached shall not be less than 2 s nor greater than 8 s.
NBN EN ISO | NBN
In downloading this file, parties accept therein the responsibility of not infringing Adobe’s licensing policy. The chain starts at the international level using international definitions of the various hardness scales to carry out international intercomparisons. NOTE Other values e. There is no correction of the hardness values with respect to the error.
In this case, an estimate of type A standard uncertainty may be obtained from the statistical analysis of repeated indentations into the test piece. This item appears on List: The corresponding effect on the termination of the formation of an indentation can make alterations in the hardness value. If two adjacent indentations differ 6057-1 size, the spacing shall be based on the mean diagonal length of the larger indentation. What are reading intentions?
Because of this approach, it is important that the individual machine een are operating within the tolerances. M2 may lead to smaller values of uncertainty. The procedure for the determination of U is explained in Table D.