ASTM D2783 - 03(2009)

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

    Active Standard ASTM D2783 | Developed by Subcommittee: D02.L0.11

    Book of Standards Volume: 05.01


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    ASTM D2783

    Significance and Use

    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.

    1. Scope

    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 D 2596.

    1.3 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 and health practices and determine the applicability of regulatory limitations prior to use.

    1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D2596 Test Method for Measurement of Extreme-Pressure Properties of Lubricating Grease (Four-Ball Method)

    ANSI Standard

    B3.12 Metal Balls Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.


    ICS Code

    ICS Number Code 75.100 (Lubricants, industrial oils and related products)

    UNSPSC Code

    UNSPSC Code 15120000(Lubricants and oils and greases and anti)


    DOI: 10.1520/D2783-03R09

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