ASTM E – Free download as PDF File .pdf), Text File .txt) or read online permitted without license from IHS Not for Resale, 05/24/ MDT. This standard is issued under the fixed designation E; the number 1 These conversion tables are under the jurisdiction of ASTM. Buy ASTM E HARDNESS CONVERSION TABLES FOR METALS RELATIONSHIP AMONG BRINELL HARDNESS, VICKERS.
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B In table headings, kgf or gf refers to total ast, force. Even in the case of a table established for a single material, such as the table for cartridge brass, some error is involved depending on composition and methods of e140–07 see Appendix X1.
B Appendix X7 contains equations converting determined hardness scale numbers to Vickers hardness numbers for copper, numbers to inclusive.
This standard has been approved for use by agencies of the Department of Defense.
Since all converted hardness values must be considered approximate, however, all converted hardness numbers shall be rounded in accordance with Practice E C The Brinell hardness numbers in parentheses are outside the range astn for Brinell hardness testing in 8. Types,L, L, adtm, and Differences in sensitivity within the range of a given hardness scale for example, Rockwell B may be greater than wstm two different scales or types of instruments.
For example, an annealed iron and a cold-rolled aluminum alloy may have hardnesses of 71 and 72 HR 15T, respectively. The equations given in Annex A10 were developed at the time the Leeb hardness test was invented see Appendix X2. These hardness conversion relationships are intended to apply particularly to the following: The equations given in Annex A1- Annex A9 were developed from the data in Tables 1 to 9, respectively.
For example, an annealed iron and a cold-rolled aluminum alloy may have hardnesses of 71 and 72 HR 15T, respectively. Knoop Hardness Number, gf and Over 99 98 97 96 95 94 93 92 91 astn 89 88 87 Rockwell A Hardness Number, kgf, Diamond Penetrator E Brinell hardness numbers in parentheses are above the maximum hardness recommended by Test Method E10 and are presented for information only.
Hardness Converter ASTM E ISO | Trelleborg
It is recommended that hardness conversions be applied primarily to values such as specification limits, which are established by agreement or mandate, and that the conversion asttm test data be avoided whenever possible see Note 1. Since all converted hardness values must be considered approximate, however, all converted Rockwell hardness numbers wstm be rounded to the nearest whole f140-07 in accordance with Practice E Each type of hardness test is subject to certain e140–07, but if precautions are carefully observed, the reliability of hardness readings made on instruments of the indentation type will be found comparable.
Methods for Hardness Determinations 3. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
This standard has been approved for use by agencies of the Department of Defense. Related publications Share Embed Add to favorites Comments. It is necessary to base hardness conversions on comparative tests of similar materials that also have very similar mechanical properties.
Appendix X2 contains equations converting determined hardness numbers to Rockwell B hardness numbers for non-austenitic steels.
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Differences in sensitivity within the range of a given hardness scale for example, Rockwell B may be greater than between two different scales or types of instruments. TABLE 3 Continued Vickers Hardness Number Knoop Hardness Number Vickers Indenter 1,5,10,kgf HV Knoop Indenter and gf HK A In table headings, kgf or gf asm to total test force.
Test coupon thicknesses ranged from approximately 0. C The Brinell hardness numbers in parentheses are outside the range recommended for Brinell hardness testing in 8. Ball HR W Apparatus and Reference Standards 4. Because of the wide range of variation among different materials, it is not possible to state condence limits for the errors in using a conversion chart.
NOTE 1—Hardness conversion values for other metals based on comparative test on similar materials having similar mechanical properties will be added to this standard as the need arises. Appendix X4 contains equations converting determined hardness scale numbers to Vickers hardness numbers for cartridge brass.
The modulus of elasticity has been shown to inuence conversions at high hardness levels; and at low hardness levels conversions between hardness scales measuring depth and those measuring diameter are likewise inuenced by differences in the modulus of elasticity.
Permission rights to photocopy the standard may also be secured from the ASTM website www. Differences in sensitivity within the range of a given hardness scale for example, Rockwell B may be greater than between two asm scales or types of e14007.