ASTM D4950-08

Standard Classification and Specification of Automotive Service Greases

STANDARD published on 15.12.2008

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The information about the standard:

Designation standards: ASTM D4950-08
Note: WITHDRAWN
Publication date standards: 15.12.2008
SKU: NS-29255
The number of pages: 5
Approximate weight : 15 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM

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Annotation of standard text ASTM D4950-08 :

Keywords:

automotive grease categories, automotive service grease, chassis grease, multipurpose automotive grease, NLGI chassis and wheel bearing service classification, NLGI grease classification, wheel bearing grease, Automotive service grease, Chassis grease, Classification (standards)--petroleum products, Grease, Lubricating grease--specifications, Multipurpose automotive grease, NLGI chassis/wheel bearing service/grease classification, Performance--petroleum products/applications

Additional information

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. No additional corrections for test precision, such as described in Practice D 3244, are to be applied 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. No other units of measurement are included in this standard.

1.4.1 Exception—Test Method D 2596 reports test results in kgf units. Until that standard is revised, Classification and Specification D 4950 will show kgf units in parentheses after the SI units for information only.

2. Referenced Documents

AMS 3217/3B	Test Slabs Chloroprene (CR)-65-75
SAE J310	Automotive Lubricating Greases
AMS 3217A	Standard Elastomer Stock-Test Slabs
AMS 3217/2C	Test Slabs, Acrylonitrile Butadiene (NBR-L)-Low Acrylonitrile, 65-75 With respect to elastomer AMS 3217/2B, the elastomer specification has been superseded by AMS 3217/2C. Per SAE, the 2A and 2B elastomers were identical, however the synthetic lubricant immersion fluid used to reference the elastomer has been exchanged from ARM-200 to AMS 3021. Reference fluid AMS 3021 better represents current market aviation fluids. Elastomers 2B and 2C were compared using NLGI GC-LB reference greases batch 1 and 2 and were found to give similar results.
D1743-22	Standard Test Method for Determining Corrosion Preventive Properties of Lubricating Greases
D3244-24	Standard Practice for Utilization of Test Data to Determine Conformance with Specifications
D4693-07(2021)	Standard Test Method for Low-Temperature Torque of Grease-Lubricated Wheel Bearings
D4290-20	Standard Test Method for Determining the Leakage Tendencies of Automotive Wheel Bearing Grease Under Accelerated Conditions
D2596-26	Standard Test Method for Measurement of Extreme-Pressure Properties of Lubricating Grease (Four-Ball Method)
D217-21a	Standard Test Methods for Cone Penetration of Lubricating Grease (Includes all amendments and changes 12/20/2021).
D4289-24a	Standard Test Method for Elastomer Compatibility of Lubricating Greases and Fluids (Includes all amendments and changes 8/2/2024).
D566-20	Standard Test Method for Dropping Point of Lubricating Grease (Withdrawn 2023)
D1742-24	Standard Test Method for Oil Separation from Lubricating Grease During Storage
D2265-22	Standard Test Method for Dropping Point of Lubricating Grease Over Wide Temperature Range
D2266-23	Standard Test Method for Wear Preventive Characteristics of Lubricating Grease (Four-Ball Method)
D1264-24a	Standard Test Method for Determining the Water Washout Characteristics of Lubricating Greases (Includes all amendments and changes 12/25/2024).
D3527-23	Standard Test Method for Life Performance of Automotive Wheel Bearing Grease
D4170-24	Standard Test Method for Fretting Wear Protection by Lubricating Greases
D4175-24e2	Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants (Includes all amendments and changes 6/9/2026).

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