ASTM D6425-23
(Test Method)Standard Test Method for Measuring Friction and Wear Properties of Extreme Pressure (EP) Lubricating Oils Using SRV Test Machine
Standard Test Method for Measuring Friction and Wear Properties of Extreme Pressure (EP) Lubricating Oils Using SRV Test Machine
SIGNIFICANCE AND USE
5.1 This test method can be used to determine antiwear properties and coefficient of friction of EP lubricating oils at selected temperatures and loads specified for use in applications in which high-speed vibrational or start-stop motions are present for extended periods of time under initial high Hertzian point contact pressures. It has found application as a screening test for lubricants used in gear or cam/follower systems. Users of this test method should determine whether results correlate with field performance or other applications.
SCOPE
1.1 This test method covers an extreme pressure (EP) lubricating oil's coefficient of friction and its ability to protect against wear when subjected to high-frequency, linear oscillation motion. The procedure is identical to that described in DIN 51834.
1.2 This test method can also be used to determine the ability of a non-EP lubricating oil to protect against wear and its coefficient of friction under similar test conditions.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.
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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.
Designation: D6425 − 23
Standard Test Method for
Measuring Friction and Wear Properties of Extreme
1
Pressure (EP) Lubricating Oils Using SRV Test Machine
This standard is issued under the fixed designation D6425; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
This test method represents the transformation of DIN 51834-2:1997. The DIN working group
implemented changes at its annual meeting in Munich in September 2000. ASTM Committee D02
adopted these modifications as closely as possible. The DIN working group widens the scope of the
standard to accommodate different test conditions and refines repeatability and reproducibility on the
base of four international RR tests. It also introduces the wear volume as a tribological quantity.
1. Scope* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This test method covers an extreme pressure (EP)
A295 Specification for High-Carbon Anti-Friction Bearing
lubricating oil’s coefficient of friction and its ability to protect
Steel
against wear when subjected to high-frequency, linear oscilla-
D235 Specification for Mineral Spirits (Petroleum Spirits)
tion motion. The procedure is identical to that described in DIN
(Hydrocarbon Dry Cleaning Solvent)
51834.
D4175 Terminology Relating to Petroleum Products, Liquid
1.2 This test method can also be used to determine the
Fuels, and Lubricants
ability of a non-EP lubricating oil to protect against wear and
D5706 Test Method for Determining Extreme Pressure
its coefficient of friction under similar test conditions.
Properties of Lubricating Greases Using a High-
1.3 The values stated in SI units are to be regarded as Frequency, Linear-Oscillation (SRV) Test Machine
D7421 Test Method for Determining Extreme Pressure
standard. No other units of measurement are included in this
standard. Properties of Lubricating Oils Using High-Frequency,
Linear-Oscillation (SRV) Test Machine
1.4 This standard does not purport to address all of the
D7755 Practice for Determining the Wear Volume on Stan-
safety concerns, if any, associated with its use. It is the
dard Test Pieces Used by High-Frequency, Linear-
responsibility of the user of this standard to establish appro-
Oscillation (SRV) Test Machine
priate safety, health, and environmental practices and deter-
E45 Test Methods for Determining the Inclusion Content of
mine the applicability of regulatory limitations prior to use.
Steel
1.5 This international standard was developed in accor-
G40 Terminology Relating to Wear and Erosion
dance with internationally recognized principles on standard-
3
2.2 DIN Standards:
ization established in the Decision on Principles for the
DIN EN ISO 683-17 Heat-treated steels, alloy steels and
Development of International Standards, Guides and Recom-
free-cutting steels—Part 17 : Ball and roller bearing steels
mendations issued by the World Trade Organization Technical
DIN 51631:1999 Mineral spirits; special boiling point spir-
Barriers to Trade (TBT) Committee.
its; requirements
1
This test method is under the jurisdiction of ASTM Committee D02 on
2
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Subcommittee D02.L0.11 on Tribological Properties of Industrial Fluids and contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Lubricates. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Nov. 1, 2023. Published January 2024. Originally the ASTM website.
3
approved in 1999. Last previous edition approved in 2019 as D6425 – 19. DOI: Available from Deutsches Institut für Normung, Beuth Verlag GmbH, Burg-
10.1520/D6425-23. grafenstrasse 6, D-10787 Berlin, Germany.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D6425 − 23
DIN 51834 Tribological Test in the Translatory Oscillation 3.1.13 wear, n—damage to a solid surface, generally involv-
Apparatus (Part 2: Determination of Friction and Wear ing progressive loss of material, due to relative motion between
Data for Lubricating Oils) that surface and a contacting substance or substances. G40
DIN EN ISO 13565-2:1998 Geometrical Product Specifica-
3.1.14 Wv, n—wear volume is th
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D6425 − 19 D6425 − 23
Standard Test Method for
Measuring Friction and Wear Properties of Extreme
1
Pressure (EP) Lubricating Oils Using SRV Test Machine
This standard is issued under the fixed designation D6425; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
This test method represents the transformation of DIN 51834-2:1997. The DIN working group
implemented changes at its annual meeting in Munich in September 2000. ASTM Committee D02
adopted these modifications as closely as possible. The DIN working group widens the scope of the
standard to accommodate different test conditions and refines repeatability and reproducibility on the
base of four international RR tests. It also introduces the wear volume as a tribological quantity.
1. Scope*
1.1 This test method covers an extreme pressure (EP) lubricating oil’s coefficient of friction and its ability to protect against wear
when subjected to high-frequency, linear oscillation motion. The procedure is identical to that described in DIN 51834.
1.2 This test method can also be used to determine the ability of a non-EP lubricating oil to protect against wear and its coefficient
of friction under similar test conditions.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.
2. Referenced Documents
2
2.1 ASTM Standards:
A295 Specification for High-Carbon Anti-Friction Bearing Steel
D235 Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent)
D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.L0.11 on Tribological Properties of Industrial Fluids and Lubricates.
Current edition approved Dec. 15, 2019Nov. 1, 2023. Published February 2020January 2024. Originally approved in 1999. Last previous edition approved in 20172019
as D6425 – 17.D6425 – 19. DOI: 10.1520/D6425-19.10.1520/D6425-23.
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, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D6425 − 23
D5706 Test Method for Determining Extreme Pressure Properties of Lubricating Greases Using a High-Frequency, Linear-
Oscillation (SRV) Test Machine
D7421 Test Method for Determining Extreme Pressure Properties of Lubricating Oils Using High-Frequency, Linear-Oscillation
(SRV) Test Machine
D7755 Practice for Determining the Wear Volume on Standard Test Pieces Used by High-Frequency, Linear-Oscillation (SRV)
Test Machine
E45 Test Methods for Determining the Inclusion Content of Steel
G40 Terminology Relating to Wear and Erosion
3
2.2 DIN Standards:
DIN EN ISO 683-17 Heat-treated steels, alloy steels and free-cutting steels—Part 17 : Ball and roller bearing steels
DIN 51631:1999 Mineral spirits; special boiling point spirits; requirements
DIN 51834 Tribological Test in the Translatory Oscillation Apparatus (Part 2: Determination of Friction and Wear Data for
Lubricating Oils)
DIN EN ISO 13565-2:1998 Geometrical Product Specifications (GPS)—Surface Texture: Profile Method; Surfaces having
Stratified Functional Properties—Part 2: Height Characterization using Linear Material Ratio Curve
...
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