ASTM B933-20
Standard Test Method for Microindentation Hardness of Powder Metallurgy (PM) Materials

Standard No.

ASTM B933-20

Release Date

2020

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM B933-20

Scope

1.1 This test method covers the determination of the microindentation hardness of powder metallurgy (PM) materials. The test method differs from the approach used for pore-free materials in terms of the precautions required to deal with the porosity. 1.2 This procedure covers tests made with the Knoop or Vickers indenters under loads in the range from 1 to 200 gf. 1.3 Automated testing is not generally suitable for use with porous PM materials, because acceptable indentations require avoiding placing indentations in the immediate vicinity of a pore, a condition not guaranteed with automated placement of the indentations. Any automated testing shall allow for review of indentations post-test to reject any distorted or unusually large indentations in accordance with 9.4. 1.4 A method for converting the directly measured indentation lengths to other hardness scales, for example, HRC is described in Appendix X1. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM B933-20 Referenced Document

• ASTM B243 Standard Terminology of Powder Metallurgy*， 2023-05-01 Update
• ASTM E384 Standard Test Method for Microindentation Hardness of Materials
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

ASTM B933-20 history

• 2020 ASTM B933-20 Standard Test Method for Microindentation Hardness of Powder Metallurgy (PM) Materials
• 2016 ASTM B933-16 Standard Test Method for Microindentation Hardness of Powder Metallurgy (PM) Materials
• 2014 ASTM B933-14 Standard Test Method for Microindentation Hardness of Powder Metallurgy 40;PM41; Materials
• 2009 ASTM B933-09 Standard Test Method for Microindentation Hardness of Powder Metallurgy (P/M) Materials
• 2004 ASTM B933-04 Standard Test Method for Microindentation Hardness of Powder Metallurgy (P/M) Materials