We perform testing by ASTM D to evaluate the compatibility of lubricants with elastomers by measuring the changes in an elastomer immersed in lubricant . ASTM D()e1. Standard Test Method for Elastomer Compatibility of Lubricating Greases and Fluids. standard by ASTM. Buy ASTM D TEST METHOD FOR ELASTOMER COMPATIBILITY OF LUBRICATING GREASES AND FLUIDS from SAI Global.
|Published (Last):||22 June 2013|
|PDF File Size:||16.40 Mb|
|ePub File Size:||12.54 Mb|
|Price:||Free* [*Free Regsitration Required]|
For ASTM D, used for automotive greases, a limited number of property changes are recommended for evaluations. If the document adtm revised or amended, you will be notified by email. This standard is not included in any packages.
ASTM D Standard Method of Testing Compatibility of Lubricating Grease with Elastomers
Ashm, wear and motion can contribute to additional failure risks. In this respect, this test method is useful for lubricant specifications for example, Specification D And in many test recommendations, there are no established guidelines for static or dynamic applications.
Testing of fluids d42899 not included in Test Method D —95 and earlier versions. In critical applications where the lubricant will be in contact with rubber parts subject to severe flexing, extreme temperatures, or similar stresses, other rubber properties, such as tensile strength and elongation, should also be evaluated as they may be more indicative of the true compatibility characteristics.
ASTM D – Standard Test Method for Elastomer Compatibility of Lubricating Greases and Fluids
No other units of measurement are included in this standard. Need more than one copy? Subscription pricing is determined by: Testing of fluids was not included in Test Method D – 95 and earlier versions.
Similarly, this test method can be used in specifications for lubricating fluids as well. These include treating long polymers chains as super-condensed gasses and then defining their empirical values. When the preparation of such coupons is not feasible, or the lubricant specification requires the use of rubber products that do not have a suitable size or configuration for use in preparing coupons for testing Practice Dthis test method can be used as a guide for evaluating compatibility.
It is recommended that the agreed upon precision values be stated in the user’s lubricant specification. Sstm test standards also do not incorporate changes in the transition temperature, which is critical for low-temperature applications. The ultimate purpose of a chemical compatibility program is to evaluate the ability of an elastomer to function as a seal in its intended application when exposed to a working fluid.
NLGI Member Only Content – Technical Article
ASTM D, for instance, typically asgm tests with a maximum exposure time of 70 hours, which significantly limits long-term predictive capabilities. For example, a dynamic seal may be required to retain more of its original properties than a static seal. In addition to changes in hardness, the tensile modulus needed to be tracked, as well as percent modulus, tensile strength and elongation at break.
Excepting the Shore Durometer A, this test method requires no specialized, rubber-testing equipment. Subscription pricing is determined by: ASTM D incorporates additional property evaluations, such as work function and compression set, but limits the test duration to only 1, hours.
It is qstm 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.
To fully evaluate material-fluid compatibility, System Seals developed new methods v4289 various standards, as well as experience from seals in broad applications.
Such values may or may not be the same as those of Test Method D Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.
Chemical Compatibility Study Reveals Shortfalls in Standard Testing Methods
Two HNBRs, for instance, might demonstrate different property changes depending on the levels of fillers and additives. To ensure full fluid saturation into the elastomer, both time and temperature were atsm to accelerate ageing.
Because some fluids experience chemical changes at higher temperatures, specific temperatures were used to control this.
Please first log in with a verified email before subscribing to alerts. For the past several years, System Seals, a research-based seal manufacturer in Cleveland, has undertaken an exhaustive fluid compatibility study that paired more than combinations of seal materials with commonly used industrial fluids. These results are limited for a number of reasons.
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. Already D42289 to this document. No other units of measurement are included in this standard.