This standard is issued under the fixed designation E92; the number immediately 1 These test methods are under the jurisdiction of ASTM Committee E28 on. Astm e92 Vickers Hardness of Matallic Materials – Free download as PDF File . pdf), Text File .txt) or read online for free. ASTM E – Vickers Hardness of Metallic Materials(1) – Download as PDF File .pdf), Text File .txt) or read online.

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Today, the hardness numbers are internationally defined in terms of SI units, that is, the test force in Newtons N. NOTE 2—While Committee E28 is primarily concerned with metallic materials, the test procedures described are applicable to other materials. NOTE 1—The Vickers and Knoop hardness numbers were originally defined in terms of the test force in kilogram-force kgf and the surface area or projected area in millimetres squared mm 2.

The significant differences between the two tests are the geometries of the respective indenters, the method of calculation of the hardness numbers, and that. Other materials may require special considerations, for example see C and C for ceramic testing.

When Newton units of force are used, the force must be divided by the conversion factor 9. Hardness, although empirical in nature, can be correlated to tensile strength for many metals, and is an indicator of wear resistance and ductility.

When Newton units of force are used, the force must be divided by the conversion factor 9. Originally approved in Link to Active This link will always route to the current Active version of the standard. Need more than one copy? It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. If the document is revised or amended, you will be notified by email. This standard provides the requirements for Vickers and Knoop hardness machines and the procedures for performing Vickers and Knoop hardness tests.

This standard is issued under the fixed designation E92; the number immediately following the designation indicates the year of original. Standards Subsctiption may be the perfect solution. However, because of the historical precedent and continued common usage, force values in gf and kgf units are provided for information and much of the discussion in this standard as well as the method of reporting the test results refers to these units.

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Proceed to Checkout Continue Shopping. Historical Version s – view previous versions of standard. This standard is also available to be included in Standards Subscriptions.

However, because of the historical precedent and continued common usage, force values in gf and kgf units are provided for information and much of the discussion in this standard as well as the method of reporting the test results refers to these units. Subscription pricing is determined by: This standard has been approved for use by agencies of the U.

This standard is not included in any packages. This standard provides the requirements for Vickers and Knoop hardness machines and the procedures for performing Vickers and Knoop hardness tests. This rise in hardness number with lower test forces is often more significant when testing higher hardness materials, and is increasingly more significant when using test forces below 50 gf see Test Method E When Newton units of force are used, the force must be divided by the conversion factor 9.

We have no amendments or corrections for this standard. Current edition approved Feb. Please first verify your email before subscribing to alerts.

This standard provides the requirements for Vickers and Knoop hardness machines and the procedures for performing Vickers and Knoop hardness tests. You may delete a document from your Alert Profile at any time. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.

However, because of the historical atsm and continued common usage, force values in gf and kgf units are provided for information and much of the discussion in this standard as well as the method of reporting the test results refers to these units. Please first log in with a verified email before subscribing to alerts. However, in practice, the most commonly used force units are kilogram-force kgf and gram-force gf. F92 hardness tests also allow specific phases or constituents and regions or gradients too small for macroindentation hardness testing to be evaluated.

Other materials may require special considerations, for example see C and C for ceramic testing. Originally approved in However, because of the historical precedent and continued common usage, force values in gf and kgf units are provided for information and much of the discussion in this standard as well as the method of reporting the test results refers to these units.

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The Vickers and Knoop hardness numbers were originally defined in terms of the test force in kilogram-force kgf and the surface area or projected area in millimetres squared mm 2.

ASTM E92 – 17

Add to Alert PDF. Already Subscribed to this document. Other materials may require special considerations, for example see C and C for ceramic testing. The significant differences between the two tests are the geometries of the respective indenters, the method of calculation of the hardness numbers, and that Vickers hardness may be used at higher force levels than Knoop hardness.

For isotropic materials, the two diagonals of a Vickers indentation are equal in length. Your Alert Profile lists the asym that will be monitored. Last previous edition approved in as E92—82 which was withdrawn July and reinstated in February Vickers and Knoop Hardness Standardizing Machines.

ASTM E – Standard Test Methods for Vickers Hardness and Knoop Hardness of Metallic Materials

This standard provides the requirements for Vickers and Knoop hardness machines and the procedures for performing Vickers and Knoop hardness tests. This standard is issued under the fixed designation E92; the number immediately following the designation indicates the year of original adoption or, axtm the case of revision, the year of last revision.

Hence, the Knoop hardness test is very useful for evaluating hardness gradients since Knoop indentations can be made closer together than Vickers indentations by orienting the Knoop indentations with the short diagonals in the direction of the hardness gradient.

Anumber in parentheses indicates the year of last reapproval. Today, the hardness numbers are internationally defined in terms of SI units, that is, the test force in Newtons N.

The significant differences between the two tests are the geometries of the respective indenters, the method of calculation of the hardness numbers, and that Vickers hardness may be used at higher force levels than Knoop hardness.