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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Ihre Klassifizierung und Auswirkung auf die Messwerte. A guideline for the determination is given in Annex D. Test method 1 Scope This part isp ISO specifies the Vickers hardness test method, for the three different ranges of test force for metallic materials see Table 1. 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 the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. Your Alert Profile lists the documents that will be monitored. 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. As the voice of the U. If the difference is greater, this shall be stated in the test report.
The corresponding effect on the termination of the formation of an indentation can make alterations in the hardness value.
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.
sio VDI-Berichte 11pp. Because of this approach, it is important that the individual machine components are operating within the tolerances. It may not always be possible to quantify all the identified contributions to the uncertainty.
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: In this case, an estimate of type A standard uncertainty may be obtained from the statistical analysis of repeated indentations into the test piece.
You may delete a document from your Alert Profile at any time. 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. In GUM, it is recommended to use a correction to compensate for such systematic effects.
ISO ： 金属维氏硬度试验 第一部分：试验方法 – MBA智库文档
As a reference, an EA guideline io is available. 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.
If not, an indirect verification should be performed. ISO consists of the following parts, under the general title Metallic materials — Vickers hardness test: 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. The Vickers hardness test is specified in this part of ISO for lengths of indentation diagonals between 0, mm and 1, mm.
The error b step 10 can be expected to be a systematic effect. Independent of the type of sources, for hardness there are two possibilities for the determination of the uncertainty. In general, as a result of the 65071, method 1 kso D. The check involves at least one indentation being made on a hardness reference block, calibrated in accordance with ISO International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
Please first log in with a verified email before subscribing to alerts. For low-force hardness and microhardness tests, the maximum time shall not exceed 10 s.
BS EN ISO – Metallic materials. Vickers hardness test. Test method
The chain starts at the international level using international definitions of the various hardness scales to carry out international intercomparisons. The main task of technical committees is to prepare International Standards.
For these tests, a longer duration is permitted and this duration shall be specified as part of the hardness designation see EXAMPLE in 4. Unless otherwise specified, no part 6570-1 this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s member body in the country of the requester. For automated measuring systems this standard should be applied accordingly.
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. The procedure for the determination of Ucorr is explained in Table D.
Verlag Berliner Union Stuttgart,pp If the measuring system fails this test, appropriate action should be taken. Already Subscribed to this document. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. Standards Subsctiption may be the perfect solution.
There is no general process of accurately converting Vickers hardness into other scales of 607-1 or into tensile strength.
BS EN ISO 6507-1:2018
Proceed to Checkout Continue Shopping. NOTE 1 A strict comparison of hardness values is only possible at identical test forces.
The arithmetical mean of the two readings shall be taken for the calculation of the Vickers hardness. Subscription pricing is determined by: