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ASTM D2783-21

Current Revision

Standard Test Method for Measurement of Extreme-Pressure Properties of Lubricating Fluids (Four-Ball Method)

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1.1 This test method covers the determination of the load-carrying properties of lubricating fluids. The following two determinations are made:

1.1.1 Load-wear index (formerly Mean-Hertz load).

1.1.2 Weld point by means of the four-ball extreme-pressure (EP) tester.

1.2 For the determination of the load-carrying properties of lubricating greases, see Test Method D2596.

1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

1.4 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.

1.5 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.


5.1 This test method, used for specification purposes, differentiates between lubricating fluids having low, medium, and high level of extreme-pressure properties. The user of this method should determine to his own satisfaction whether results of this test procedure correlate with field performance or other bench test machines.

SDO ASTM: ASTM International
Document Number D2783
Publication Date Nov. 1, 2021
Language en - English
Page Count 9
Revision Level 21
Supercedes
Committee D02.L0.11
Publish Date Document Id Type View
Nov. 1, 2021 D2783-21 Revision
May 1, 2019 D2783-19 Revision
April 15, 2009 D2783-03R09E01 Revision
Aug. 10, 2003 D2783-03 Revision
Dec. 1, 2014 D2783-03R14 Reaffirmation
April 15, 2009 D2783-03R09 Reaffirmation
Nov. 10, 1998 D2783-88R98 Reaffirmation