ASTM D8120 - 17

    Standard Test Method for Ferrous Debris Quantification

    Active Standard ASTM D8120 | Developed by Subcommittee: D02.96.06

    Book of Standards Volume: 05.05


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    Significance and Use

    5.1 By quantifying the concentration of total ferrous debris, this test method provides a direct indication of wear in the machinery by enabling the user to pinpoint when there is a deviation from the normal buildup of ferrous debris shed by the machinery or when the concentration of ferrous debris has exceeded safe operating limits. Specific guidance regarding such procedures may be found in Guides D7669, D7720, and D7874.

    5.2 This test method can be performed on-site and can be utilized as a particle-size insensitive, minimum sample preparation alternative to laboratory-based screening for abnormal machinery conditions due to the presence of wear debris by means of ferrography as described in Practice D7690, or elemental analysis methods such as atomic emission spectrometry, described in Test Methods D5185 and D6595.

    1. Scope

    1.1 This test method describes a means for quantitative determination of the concentration of ferrous debris in lubricants and greases.

    1.2 This test method provides a determination of the concentration of ferrous debris in the lubricant or grease from a nominal 0 mg/kg to 10 000 mg/kg (1 % by mass) or greater.

    1.3 This test method is applicable to all types of lubricating fluids (API Group I-V) and greases sampled from machinery and other mechanical equipment, including reciprocating engine oils, turbine oils, hydraulic oils, gear oils, and bearing greases.

    1.4 This test method describes a means by which a sample of lubricant or grease is placed in a magnetometer apparatus, which determines the concentration of ferrous debris and provides these readings directly to the operator without further calculation.

    1.5 This test method is applicable to in-service lubricants and greases at any stage of degradation.

    1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.7 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.

    1.8 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.


    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

    D4057 Practice for Manual Sampling of Petroleum and Petroleum Products

    D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products

    D5185 Test Method for Multielement Determination of Used and Unused Lubricating Oils and Base Oils by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)

    D5854 Practice for Mixing and Handling of Liquid Samples of Petroleum and Petroleum Products

    D6595 Test Method for Determination of Wear Metals and Contaminants in Used Lubricating Oils or Used Hydraulic Fluids by Rotating Disc Electrode Atomic Emission Spectrometry

    D7669 Guide for Practical Lubricant Condition Data Trend Analysis

    D7690 Practice for Microscopic Characterization of Particles from In-Service Lubricants by Analytical Ferrography

    D7718 Practice for Obtaining In-Service Samples of Lubricating Grease

    D7720 Guide for Statistically Evaluating Measurand Alarm Limits when Using Oil Analysis to Monitor Equipment and Oil for Fitness and Contamination

    D7874 Guide for Applying Failure Mode and Effect Analysis (FMEA) to In-Service Lubricant Testing


    ICS Code

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

    Referencing This Standard
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    DOI: 10.1520/D8120-17

    Citation Format

    ASTM D8120-17, Standard Test Method for Ferrous Debris Quantification, ASTM International, West Conshohocken, PA, 2017, www.astm.org

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