ASTM E140 PDF

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This standard is issued under the fixed designation E; the number 1 These conversion tables are under the jurisdiction of ASTM. Standard Hardness Conversion Tables for. among Brinell hardness, Vickers hardness, Rockwell hardness, Conversion Table 2 presents data in the Rockwell B Rockwell superficial hardness, and Knoop hardness of copper. ASTM E - Download as PDF File .pdf), Text File .txt) or read online.


Astm E140 Pdf

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Hardness Conversion per ASTM E, Strength per ASTM A, See bottom half of table. Hardness C. Hardness Conversion Ta rdness Conversion Table. ASTM E Standard Hardness Conversion Tables for Metals Relationship ALSO SEE ASTM E (R). Format. Details. Price (USD). PDF. Single User. Applied force according to ASTM E 1 . ASTM E HARDNESS CONVERSION EQUATIONS FOR bestthing.info bestthing.info

Indentation hardness is not a single fundamental property but a combination of properties, and the contribution of each to the hardness number varies with the type of test. 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.

Therefore separate conversion tables are necessary for different materials.

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. Signicance and Use 6. This is because conversions can be affected by several factors, including the material alloy, grain structure, heat treatment, etc. 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.

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 processing see Appendix X1.

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It is recommended that hardness conversions be applied primarily to values such as specication limits, which are established by agreement or mandate, and that the conversion of test data be avoided whenever possible.

Reporting of Hardness Numbers 7. Keywords 8. Appendix X1 contains equations converting determined hardness scale numbers to Rockwell C hardness numbers for non-austenitic steels. Refer to 1. C The Brinell hardness numbers in parentheses are outside the range recommended for Brinell hardness testing in 8. D These Scleroscope hardness conversions are based on Vickers—Scleroscope hardness relationships developed from Vickers hardness data provided by the National Bureau of Standards for 13 steel reference blocks, Scleroscope hardness values obtained on these blocks by the Shore Instrument and Mfg.

Knoop Hardness Number, gf and Over 99 98 97 96 95 94 93 92 91 90 89 88 87 Rockwell A Hardness Number, kgf, Diamond Penetrator In table headings, kgf refers to total test force.

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Appendix X2 contains equations converting determined hardness numbers to Rockwell B hardness numbers for non-austenitic steels. NOTE 2—The use of hardness scales for hardness values shown in parentheses is not recommended since they are beyond the ranges recommended for accuracy.

Such values are shown for comparative purposes only, where comparisons may be desired and the recommended machine and scale are not available. TABLE 3 Vickers Hardness Number Vickers Indenter 1,5,10,kgf HV Knoop Indenter and gf HK Knoop Hardness Number Continued E — 05e1 8 A B In table headings, kgf or gf refers to total test force.

Appendix X3 contains equations converting determined hardness scale numbers to Vickers hardness numbers for nickel and high-nickel alloys. These recommendations are designed to limit impression diameters to the range from 2. The Brinell hardness numbers in this conversion table are based on tests using a kgf force. When the kgf force is used for the softer nickel and high-nickel alloys, these conversion relationships do not apply.

F Scale, kgf in. Appendix X1 contains equations converting determined hardness scale numbers to Rockwell C hardness numbers for non-austenitic steels.

Refer to 1.

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C The Brinell hardness numbers in parentheses are outside the range recommended for Brinell hardness testing in 8. D These Scleroscope hardness conversions are based on Vickers—Scleroscope hardness relationships developed from Vickers hardness data provided by the National Bureau of Standards for 13 steel reference blocks, Scleroscope hardness values obtained on these blocks by the Shore Instrument and Mfg.

Knoop Hardness Number, gf and Over 99 98 97 96 95 94 93 92 91 90 89 88 87 Rockwell A Hardness Number, kgf, Diamond Penetrator In table headings, kgf refers to total test force.

Appendix X2 contains equations converting determined hardness numbers to Rockwell B hardness numbers for non-austenitic steels. NOTE 2—The use of hardness scales for hardness values shown in parentheses is not recommended since they are beyond the ranges recommended for accuracy. Such values are shown for comparative purposes only, where comparisons may be desired and the recommended machine and scale are not available.

TABLE 3 Vickers Hardness Number Vickers Indenter 1,5,10,kgf HV Knoop Indenter and gf HK Knoop Hardness Number Continued E — 05e1 8 A B In table headings, kgf or gf refers to total test force. Appendix X3 contains equations converting determined hardness scale numbers to Vickers hardness numbers for nickel and high-nickel alloys.

These recommendations are designed to limit impression diameters to the range from 2.

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The Brinell hardness numbers in this conversion table are based on tests using a kgf force. When the kgf force is used for the softer nickel and high-nickel alloys, these conversion relationships do not apply. Brinell Hardness Number kgf, mm Ball HBS 99 97 95 94 92 90 88 86 85 83 82 80 79 77 76 74 72 70 68 66 64 63 62 61 59 57 98 96 94 92 90 88 86 84 82 80 78 76 74 72 70 68 66 64 62 9 E — 05e1 TABLE 4 Rockwell Hardness Number Vickers Hardness Number HV B Scale, kgf, in.

F Scale, kgf in. Appendix X4 contains equations converting determined hardness scale numbers to Vickers hardness numbers for cartridge brass. Appendix X5 contains an equation converting determined Brinell hardness numbers to Rockwell B hardness numbers for austenitic steel plate in the annealed condition. Tempers ranged from annealed to extra hard for Type , with a smaller range of tempers for the other types. Test coupon thicknesses ranged from approximately 0.

Appendix X6 contains equations converting determined hardness numbers to Rockwell C and Rockwell B hardness numbers for austenitic stainless steel sheet. C Observed standard deviation of the interlaboratory test data about the indicated conversion line.

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Appendix X7 contains equations converting determined hardness scale numbers to Vickers hardness numbers for copper, numbers to inclusive. Request RR: E B In table headings, kgf or gf refers to total test force. C Appendix X8 contains equations converting determined hardness scale numbers to Vickers hardness numbers for alloyed white irons.

E Brinell hardness numbers in parentheses are above the maximum hardness recommended by Test Method E10 and are presented for information only. Ball in. C Annex A9 contains equations converting determined hardness scale numbers to Brinell numbers for wrought aluminum products.

B Annex A10 contains equations converting from Leeb hardness numbers to desired hardness scale numbers for non-austenitic steels see 1. C The Brinell hardness numbers in parentheses are outside the range recommended for Brinell hardness testing in Test Method E Mandatory Information. Due to inherent inaccuracies in the conversion process, the converted number should be rounded to the nearest whole 2 1.

HRC 5 Rockwell C hardness: Due to inherent inaccuracies in the conversion process, the converted number should be rounded to the nearest whole A2. HRB 5 Due to inherent inaccuracies in the conversion process, A3.

Due to inherent inaccuracies in the conversion process, A4.

HV 5 Due to inherent inaccuracies in the conversion process, the converted number should be rounded to the nearest whole number in accordance with Practice E Due to inherent inaccuracies in the conversion process, the converted number should be rounded to the nearest whole A6. Due to inherent inaccuracies in the conversion process, the converted number should be rounded to the nearest whole Due to inherent inaccuracies in the conversion process, the converted number should be rounded to the nearest whole HV 50 5 Due to inherent inaccuracies in the conversion process, The data in Table 10 was calculated from these equations.

The equations should not be used for converting numbers outside of Due to inherent inaccuracies HV10 5 2.

Nonmandatory Information. This dependence for all degrees of strain hardening. This is true of yellow on strain-hardening characteristics can be demonstrated by the brasses and low-carbon steels and irons. The limiting condi- Rockwell scales T, T, T, F, and B, in which forces tions can usually be identified by the appearance of the ranging from 15 to kgf are applied on a in. Soft annealed metals have diameter ball indenter.

As higher forces are used, the increased characteristic sinking type indentation contours when indent- strain raises the hardness by an amount that depends on the ers of the ball type are used. On the other hand, heavily pretest capacity of the metal for strain hardening.

An annealed cold-worked metals have sharp ridging type indentations. For example, an the indentation contours pass through a flat stage in which annealed iron and a cold-rolled aluminum alloy may have the lip of the indentation is neither round nor sharply ridged. It hardnesses of 71 and 72 HR 15T, respectively. The hardnesses is necessary to base hardness conversions on comparative tests are 31 HRB for the soft annealed iron and 7 HRB for the of similar materials that also have very similar mechanical cold-rolled aluminum alloy.

Some These established conversions are currently in wide use by deviations of the round-robin data from the conversion equa- industry.

ASTM-E140-HardnessConversion.pdf - An American National...

ASTM subcommittee E The details of the round Comparisons of the round-robin data to the conversion equa- robin study can be found in ASTM research report tions is presented in Figs. The R2 value, or the coefficient of determination, given with the figures is a statistical measure of 6 Supporting data have been filed at ASTM International Headquarters and may 5 The conversion equations were developed by a single manufacturer of Leeb be obtained by requesting Research Report RR: Service at service astm.

The standard deviation of subcommittee E Committee E28 has identified the location of selected changes to this standard since the last issue Ea that may impact the use of this standard. Approved Dec. Committee E28 has identified the location of selected changes to this standard since the last issue E that may impact the use of this standard.

Approved Sept. Approved August 15, ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn.

ASTM E140-12

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.C Vickers Hardness.

As higher forces are used, the increased strain raises the hardness by an amount that depends on the pretest capacity of the metal for strain hardening.

C Appendix X9 contains equations converting determined hardness scale numbers to Brinell numbers for wrought aluminum products. Amit Hasan. Appendix X6 contains equations converting determined hardness numbers to Rockwell C and Rockwell B hardness numbers for austenitic stainless steel sheet. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Principle of Method of Conversion 5. Types , , , , , L, , , L, , and Scope 1.

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