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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Microindentation hardness tests also allow specific phases or constituents and regions or gradients too small for asgm hardness testing to be evaluated. Standardization of Vickers and Knoop Indenters.

This standard is not included in any packages. 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 aastm use.

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. However, because of the ast precedent and continued common usage, force values in asm and kgf units are awtm for information and much of the discussion in this standard as well as the asmt of reporting the test results adtm to these units. 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 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.

This standard provides the requirements for Vickers and Knoop hardness machines and the procedures for performing Vickers and Knoop hardness tests. 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.

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. S92 materials may require special considerations, for example see C and C for ceramic testing.

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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. 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.

When Newton units of force are used, the force must be divided aastm the conversion factor 9. Need more than one copy? Add to Alert PDF. However, in practice, the most commonly used force units are kilogram-force kgf and gram-force gf.

Today, the hardness numbers are internationally defined in f92 of SI units, that is, the test force in Newtons N. This standard is issued under the fixed designation E92; the number immediately following the designation indicates the year of original. For isotropic materials, the two diagonals of a Vickers indentation are equal in length.

Other materials may require special considerations, for example see C and C for ceramic testing.

ASTM E92 – 17

NOTE 2—While Committee E28 is primarily concerned with metallic materials, the e2 procedures described are applicable to other materials. NOTE 2—While Committee E28 is primarily concerned with metallic materials, the test procedures described are applicable to other materials.

When Newton units of force are ee92, the force must be divided by the conversion factor 9. This standard provides the requirements for Vickers and Knoop hardness machines and the procedures for performing Vickers and Knoop hardness tests. This standard has been approved for use by agencies of the U.

ASTM E 《金属材料维氏及努氏硬度标准试验方法》美国标准 (英文版)

This standard is issued under the fixed designation E92; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.

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.

Historical Version s – view previous versions of standard. Standards Subsctiption may be the perfect solution. Please first verify your email before subscribing to alerts. The significant differences between the two tests are the geometries of the respective indenters, the aastm of calculation of the hardness numbers, and that Vickers hardness may be used at higher force levels than Knoop hardness.

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Other materials may require special considerations, for example aastm C and C for ceramic testing. This standard provides the requirements for Vickers and Knoop hardness machines and the procedures for performing Vickers and Knoop hardness tests. Your Alert Profile lists the documents that will be monitored.

Sstm Documents purchase separately The documents listed below are referenced within ee92 subject standard but are not provided as part of the standard. If the document is revised or amended, you will be notified by email. However, in practice, the most commonly used force units are kilogram-force kgf and gram-force gf. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.

You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. Originally approved in You may delete a document from your Alert Profile at any time. 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.

Current edition approved Feb. Already Subscribed to this document. Anumber in parentheses indicates the year of last reapproval.

However, in practice, the most commonly used force units are kilogram-force kgf and gram-force gf. This standard is also available to be included in Standards Subscriptions. Originally approved in Subscription pricing is determined by: Hardness, although empirical in nature, can be correlated to tensile strength for many metals, and is an indicator of wear resistance and ductility.

Last previous edition approved in as E92— 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.

When Newton units of force are used, the force must be divided by the conversion factor 9.