Astm e140-07

By | 11.10.2018

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. The Brinell hardness numbers in this conversion table are based on tests using a kgf force. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Appendix X4 contains equations converting determined hardness scale numbers to Vickers hardness numbers for cartridge brass. NOTE 2—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.

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Hardness Converter ASTM E140-07 ISO 18265:2003 | Trelleborg

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. 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.

This is true of yellow brasses and low-carbon steels and irons. Differences in sensitivity within the range of a given hardness scale for example, Rockwell B may be greater than between two e104-07 scales or types of instruments. Principle of Method of Conversion 5. 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.

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.

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. C The Brinell hardness numbers in parentheses are outside the range recommended for Brinell hardness testing in 8.

ASTM Ee1《金属标准硬度换算表》_百度文库

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. The limiting conditions can usually be identied by the appearance of the hardness indentations themselves.

E — 05e1 Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Supercial Hardness, Knoop Hardness, and Scleroscope Hardness1 This standard is issued under the xed designation E ; the number immediately following the designation e14-007 the year of original adoption or, in the case of revision, the year of last revision.

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. The conversion values, whether from the tables or calculated from the equations, are only approximate and e1400-07 be inaccurate for specific application. Appendix X4 contains equations converting determined hardness scale numbers to Vickers hardness numbers for cartridge brass.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. This is because conversions can be affected by several factors, including the material alloy, grain structure, heat treatment, etc.

Your comments are invited either for revision of this standard or awtm additional standards and should be addressed to ASTM International Headquarters. A number in parentheses indicates the year of last reapproval. These hardness conversion relationships are intended to apply particularly to the following: Current edition approved April 1, satm Since all converted hardness values must be considered approximate, however, all converted Rockwell hardness numbers shall be rounded to the nearest whole number in accordance with Practice E Most Rockwell hardness numbers are presented to the nearest 0.

Approved April 1, 1 Table 9 spacing was corrected.

ASTM E140-07

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. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Current edition approved Jan. Signicance and Use 6. C Appendix X8 contains equations converting determined hardness scale numbers to Vickers hardness numbers for alloyed white e14-007.

Tempers ranged from annealed to extra hard for Typewith a smaller range of tempers for the other types. B Appendix X2 contains equations converting determined hardness numbers to Rockwell B hardness numbers for non-austenitic steels. Due to inherent inaccuracies in the conversion process, the converted number should be rounded to the nearest whole number in accordance with Practice E B Appendix X1 contains equations converting determined hardness scale numbers to Rockwell C hardness numbers for non-austenitic steels.

Originally approved in Indentation hardness is not a single fundamental property but a combination of properties, and the contribution of each to the hardness number varies with e14-007 type of test. Permission rights to photocopy the standard may also be secured from the ASTM website www.

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