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ASTM D4950-19

Standard Classification and Specification for Automotive Service Greases

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NORMA vydána dne 1.11.2019

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Provedení	PDF - okamžité stažení - 1 771.20 Kč Tištěné - 1 771.20 Kč
Dostupnost	SKLADEM
Cena	1 771.20 Kč bez DPH
1 771.20 Kč

Informace o normě:

Označení normy: ASTM D4950-19
Poznámka: NEPLATNÁ
Datum vydání normy: 1.11.2019
Kód zboží: NS-976167
Počet stran: 6
Přibližná hmotnost: 18 g (0.04 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM

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Kategorie - podobné normy:

Maziva, průmyslové oleje a odpovídající výrobky

Anotace textu normy ASTM D4950-19 :

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

Doplňující informace

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.

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
D3244-21a	Standard Practice for Utilization of Test Data to Determine Conformance with Specifications (Includes all amendments and changes 10/14/2021).
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
D2596-20	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).
D4289-21	Standard Test Method for Elastomer Compatibility of Lubricating Greases and Fluids
D566-20	Standard Test Method for Dropping Point of Lubricating Grease (Withdrawn 2023)
D1742-20	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)
D1264-18e1	Standard Test Method for Determining the Water Washout Characteristics of Lubricating Greases (Includes all amendments and changes 2/7/2020).
D3527-23	Standard Test Method for Life Performance of Automotive Wheel Bearing Grease
D4170-16	Standard Test Method for Fretting Wear Protection by Lubricating Greases
D4175-23a	Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants (Includes all amendments and changes 12/21/2023).

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