Standard Classification and Specification for Automotive Service Greases

SCOPE
1.1 This specification covers lubricating greases suitable for the periodic relubrication of chassis systems and wheel bearings of passenger cars, trucks, and other vehicles.  
1.2 This specification defines the requirements used to describe the properties and performance characteristics of chassis greases and wheel bearing greases for service-fill applications.  
1.3 The test requirements (acceptance limits) given in this specification are, as the case may be, minimum or maximum acceptable values for valid duplicate test results. Apply no additional corrections for test precision, such as described in Practice D3244, inasmuch as the precision of the test methods was taken into account in the determination of the requirements.  
1.4 The values stated in SI units are to be regarded as standard.  
1.4.1 Exceptions—Test Method D2596 reports test results in kgf units, and Test Method D4289 reports rubber hardness in Durometer Shore A units.  
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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Publication Date
30-Nov-2022
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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:D4950 −22
Standard Classification and Specification for
1,2
Automotive Service Greases
This standard is issued under the fixed designation D4950; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
This specification describes current categories of lubricating greases for automotive service-fill
applications. A specific designation is assigned to each category. The system is open ended, that is,
new designations are assigned for use with new categories as each new set of grease performance
characteristics is defined. Grease categories are referenced by automotive manufacturers in making
lubrication recommendations and used by grease suppliers and users in identifying products for
specific applications.
1. Scope* mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 Thisspecificationcoverslubricatinggreasessuitablefor
the periodic relubrication of chassis systems and wheel bear-
2. Referenced Documents
ings of passenger cars, trucks, and other vehicles.
3
2.1 ASTM Standards:
1.2 This specification defines the requirements used to
D217Test Methods for Cone Penetration of Lubricating
describe the properties and performance characteristics of
Grease
chassis greases and wheel bearing greases for service-fill
D1264Test Method for Determining the Water Washout
applications.
Characteristics of Lubricating Greases
1.3 The test requirements (acceptance limits) given in this
D1742Test Method for Oil Separation from Lubricating
specification are, as the case may be, minimum or maximum
Grease During Storage
acceptable values for valid duplicate test results. Apply no
D1743Test Method for Determining Corrosion Preventive
additional corrections for test precision, such as described in
Properties of Lubricating Greases
Practice D3244, inasmuch as the precision of the test methods
D2265Test Method for Dropping Point of Lubricating
was taken into account in the determination of the require-
Grease Over Wide Temperature Range
ments.
D2266Test Method for Wear Preventive Characteristics of
1.4 The values stated in SI units are to be regarded as
Lubricating Grease (Four-Ball Method)
standard.
D2596Test Method for Measurement of Extreme-Pressure
1.4.1 Exceptions—TestMethodD2596reportstestresultsin
Properties of Lubricating Grease (Four-Ball Method)
kgf units, and Test Method D4289 reports rubber hardness in
D3244Practice for Utilization of Test Data to Determine
Durometer Shore A units.
Conformance with Specifications
D3527Test Method for Life Performance of Automotive
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard- Wheel Bearing Grease
D4170Test Method for Fretting Wear Protection by Lubri-
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- cating Greases
D4175Terminology Relating to Petroleum Products, Liquid
Fuels, and Lubricants
D4289Test Method for Elastomer Compatibility of Lubri-
1
This classification and specification is under the jurisdiction of ASTM
cating Greases and Fluids
Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the
direct responsibility of Subcommittee D02.B0.04 on Automotive Greases.
Current edition approved Dec. 1, 2022. Published January 2023. Originally
published in 1989. Last previous edition approved in 2019 as D4950–19. DOI:
3
10.1520/D4950-22. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
2
This classification and specification was developed as a cooperative effort contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
among the American Society for Testing and Materials, the National Lubricating Standards volume information, refer to the standard’s Document Summary page on
Grease Institute (NLGI), and the Society of Automotive Engineers (SAE). 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 ----------------------
D4950−22
D4290Test Method for Determining the Leakage Tenden- 3.2.5 “G” category group, n—automotiveservicegreasesof
cies of Automotive Wheel Bearing Grease Under Accel- such composition, properties, and performance characteristics
erated Conditions as to be suitable for the service lubrication o
...

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: D4950 − 19 D4950 − 22
Standard Classification and Specification for
1,2,
Automotive Service Greases
This standard is issued under the fixed designation D4950; 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 specification describes current categories of lubricating greases for automotive service-fill
applications. A specific designation is assigned to each category. The system is open ended, that is,
new designations are assigned for use with new categories as each new set of grease performance
characteristics is defined. Grease categories are referenced by automotive manufacturers in making
lubrication recommendations and used by grease suppliers and users in identifying products for
specific applications.
1. Scope*
1.1 This specification covers lubricating greases suitable for the periodic relubrication of chassis systems and wheel bearings of
passenger cars, trucks, and other vehicles.
1.2 This specification defines the requirements used to describe the properties and performance characteristics of chassis greases
and wheel bearing greases for service-fill applications.
1.3 The test requirements (acceptance limits) given in this specification are, as the case may be, minimum or maximum acceptable
values for valid duplicate test results. Apply no additional corrections for test precision, such as described in Practice D3244,
inasmuch as the precision of the test methods was taken into account in the determination of the requirements.
1.4 The values stated in SI units are to be regarded as standard.
1.4.1 Exceptions—Test Method D2596 reports test results in kgf units, and Test Method D4289 reports rubber hardness in
Durometer Shore A units.
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.
1
This classification and specification is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility
of Subcommittee D02.B0.04 on Automotive Greases.
Current edition approved Nov. 1, 2019Dec. 1, 2022. Published November 2019January 2023. Originally published in 1989. Last previous edition approved in 20142019
as D4950 – 14.D4950 – 19. DOI: 10.1520/D4950-19.10.1520/D4950-22.
2
This classification and specification was developed as a cooperative effort among the American Society for Testing and Materials, the National Lubricating Grease
Institute (NLGI), and the Society of Automotive Engineers (SAE).
*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 ----------------------
D4950 − 22
2. Referenced Documents
3
2.1 ASTM Standards:
D217 Test Methods for Cone Penetration of Lubricating Grease
D566 Test Method for Dropping Point of Lubricating Grease
D1264 Test Method for Determining the Water Washout Characteristics of Lubricating Greases
D1742 Test Method for Oil Separation from Lubricating Grease During Storage
D1743 Test Method for Determining Corrosion Preventive Properties of Lubricating Greases
D2265 Test Method for Dropping Point of Lubricating Grease Over Wide Temperature Range
D2266 Test Method for Wear Preventive Characteristics of Lubricating Grease (Four-Ball Method)
D2596 Test Method for Measurement of Extreme-Pressure Properties of Lubricating Grease (Four-Ball Method)
D3244 Practice for Utilization of Test Data to Determine Conformance with Specifications
D3527 Test Method for Life Performance of Automotive Wheel Bearing Grease
D4170 Test Method for Fretting Wear Protection by Lubricating Greases
D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
D4289 Test Method for Elastomer Compatibility of Lubricating Greases and Fluids
D4290 Test Method for Determining the Leakage Tendencies of Automotive Wheel Bearing Grease Under Accelerated
Conditions
D4693 Test Method for Low-Temperature Torque of Grease-Lubricated Wheel Bearings
4
2.2 SAE Standards:
AMS 3217A Standard Elastomer Stock-Test Sla
...

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