1. Scope

1.1 This test method evaluates the compatibility of lubricating greases and fluids with coupons cut from standard elastomer sheets (Practice D3182) or, optionally, from SAE Specification AMS 3217/2A (NBR-L) and AMS 3217/3A (CR) sheets. Compatibility is evaluated by determining the changes in volume and Durometer A hardness that occur when elastomer coupons are totally immersed in a lubricant sample for 70 h at either 100 or 150 ^o C or as required by the lubricant specification.

1.1.1 Some lubricant specifications may require different test conditions, such as longer durations or lower or higher temperatures. In such instances, the repeatability and reproducibility values stated in Section 12 do not apply, and the user and supplier should agree on acceptable limits of precision.

1.2 This test method can also be used as a guide to evaluate the compatibility of greases with rubber products not in standard sheet form (Practice D3183).

1.3 The values stated in SI and Durometer A units shall be regarded as the 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 and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Note 6, Note 7, and Note 8.

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

D217 Test Methods for Cone Penetration of Lubricating Grease

D297 Test Methods for Rubber Products--Chemical Analysis

D412 Test Methods for Vulcanized Rubber and Thermoplastic Elastomers--Tension

D471 Test Method for Rubber Property--Effect of Liquids

D1193 Specification for Reagent Water

D2240 Test Method for Rubber Property--Durometer Hardness

D3182 Practice for Rubber--Materials, Equipment, and Procedures for Mixing Standard Compounds and Preparing Standard Vulcanized Sheets

D3183 Practice for Rubber--Preparation of Pieces for Test Purposes from Products

D4175 Terminology Relating to Petroleum, Petroleum Products, and Lubricants

D4950 Classification and Specification for Automotive Service Greases

Federal Standards

U.S. Air Force Specifications

SAE Standards

Keywords

compatibility; density; elastomer; fluid; grease; immersion; lubricant; lubricating grease; relative; rubber; seal(s); Compatibility--petroleum products; Elastomeric materials/applications; Hardness tests; Lubricating grease; Specific gravity--petroleum products; Volumetric measurement--petroleum products;

ICS Code

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

DOI: 10.1520/D4289-97

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