Manual De Laboratorio De Pirometalurgia

Designation: E10 – 10

American Association State Highway and Transportation Officials Standard AASHTO No.: T70–86

Standard Test Method for

Brinell Hardness of Metallic Materials1
This standard is issued under the fixed designation E10; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A numberin parentheses indicates the year of last reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense.

1. Scope 1.1 This test method covers the determination of the Brinell hardness of metallic materials by the Brinell indentation hardness principle. This standardprovides the requirements for a Brinell testing machine and the procedures for performing Brinell hardness tests. 1.2 This standard includes additional requirements in four annexes:
Verification of Brinell Hardness Testing Machines Brinell Hardness Standardizing Machines Standardization of Brinell Hardness Indenters Standardization of Brinell Hardness Test Blocks Annex A1 Annex A2 Annex A3 Annex A41.3 This standard includes nonmandatory information in an appendix which relates to the Brinell hardness test:
Table of Brinell Hardness Numbers Examples of Procedures for Determining Brinell Hardness Uncertainty Appendix X1 Appendix X2

1.4 At the time the Brinell hardness test was developed, the force levels were specified in units of kilograms-force (kgf). Although this standard specifies theunit of force in the International System of Units (SI) as the Newton (N), because of the historical precedent and continued common usage of kgf units, force values in kgf units are provided for information and much of the discussion in this standard refers to forces in kgf units. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 2. Referenced Documents 2.1 ASTM Standards:2 E29 Practice for Using Significant Digits in Test Data to
1 This test method is under the jurisdiction of ASTM Committee E28 on Mechanical Testing and is the direct responsibility ofSubcommittee E28.06 on Indentation Hardness Testing. Current edition approved June 1, 2010. Published June 2010. Originally approved in 1924. Last previous edition approved in 2008 as E10 – 08. DOI: 10.1520/E0010-10. 2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards volume information, referto the standard’s Document Summary page on the ASTM website.

Determine Conformance with Specifications E74 Practice of Calibration of Force-Measuring Instruments for Verifying the Force Indication of Testing Machines E140 Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, and Scleroscope HardnessE384 Test Method for Knoop and Vickers Hardness of Materials 2.2 American Bearings Manufacturer Association Standard: ABMA 10-1989 Metal Balls3 2.3 ISO Standards: ISO/IEC 17011 Conformity Assessment—General Requirements for Accreditation Bodies Accrediting Conformity Assessment Bodies4 ISO/IEC 17025 General Requirements for the Competence of Calibration and Testing4 3. Terminology and Equations 3.1Definitions: 3.1.1 calibration—determination of the values of the significant parameters by comparison with values indicated by a reference instrument or by a set of reference standards. 3.1.2 verification—checking or testing to assure conformance with the specification. 3.1.3 standardization—to bring in conformance with a known standard through verification or calibration. 3.1.4 Brinell hardness...