hardness test —. Part 1: Test method. Matériaux métalliques — Essai de dureté Vickers —. Partie 1: Méthode d’essai. STANDARD. ISO. Fourth edition. ISO INTERNATIONAL. STANDARD. ISO. Third edition. Metallic materials — Vickers hardness test —. Part 1: Test method. Matériaux . 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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Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. In general, as a result of the measurement, method 1 [Equation D. There is no general process of accurately converting Vickers hardness into other scales of hardness or into tensile strength.
Ihre Klassifizierung und Auswirkung auf die Messwerte. Adobe is a trademark of Adobe Systems Incorporated. In this case, an estimate of type A standard uncertainty may be obtained from the statistical analysis of repeated indentations into the test piece. The time 65077-1 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.
As the voice of the U. The Vickers hardness test is specified in this part of ISO for lengths of indentation diagonals between 0, mm and 1, mm.
This is the base of M2. The finish of the surface shall permit accurate determination of the diagonal length of the indentation. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked 6507-11.
The support surfaces shall be clean and free from foreign matter scale, oil, dirt, etc.
NOTE 1 For indentation diagonals less than 0, mm, the increase of the uncertainty has to be considered. If two adjacent indentations differ in size, the spacing shall be based on the mean diagonal jso of the larger indentation. A guideline for the determination is given in Annex D. The required thickness is given by the point of intersection of the minimum thickness scale and a line shown dotted in the example in Figure A.
The chain starts at the international level using international definitions of the various hardness scales to carry out international intercomparisons.
These performance uncertainties reflect the combined uso to all 65077-1 separate uncertainties indirect verification. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
Need more than one copy? Jso is no correction of the hardness values with respect to the error. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.
HV 2,5 24,52 N may be used. Such conversions, therefore, should be avoided, unless a reliable basis for conversion can be obtained by comparison tests. A record of these results should be maintained over a period of time, and used to measure reproducibility and monitor drift of the machine. 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.
Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. It is strongly recommended that this procedure be applied for a maximum of one year after the successful passing of a direct verification. NOTE 2 In general, decreasing the test force increases the scatter of results of the measurements.
You may delete a document from your Alert Profile at any time. For automated measuring systems this standard should be applied accordingly. We have no amendments or corrections for this standard. 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.
ISO – Metallic materials — Vickers hardness test — Part 1: Test method
The work of preparing International Standards is normally carried out through ISO technical committees. NOTE 1 A strict comparison of hardness values is only possible at identical test forces.
For low-force hardness and microhardness tests, the maximum time shall not exceed 10 s. Subscription pricing is determined by: For these tests, a longer duration is permitted and this duration shall be specified as part of the hardness designation see EXAMPLE in 4.
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.
It is important that the test piece lies firmly on the support so that displacement cannot occur during the test. Standards Subsctiption may be the perfect solution. The arithmetical mean of the two readings shall be taken for the calculation of the Vickers hardness.
VDI-Berichte 11pp. NOTE Other values e. Proceed to Checkout Continue Shopping. The corresponding effect on the termination of the formation of an indentation can make alterations in the hardness value.
Because of this approach, it is important that the individual machine components are operating within the tolerances.
BS EN ISO 6507-1:2018
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. The procedure for the determination of Ucorr is explained in Table D. 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 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.