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.
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ASTM D Standard Method of Testing Compatibility of Lubricating Grease with Elastomers
And, it is impossible to accurately deduce material changes for one material based on the results of another, even if the materials are in the same family. In most cases, testing reveals little to no information about any actual changes in material properties. Please first verify your email before subscribing to alerts. But volume swell does not indicate chemical reaction on its own. Simple rankings and broad generalizations about seal properties and related families are inadequate for effective engineering purposes.
The ultimate purpose of a asfm 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.
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Ast, Alert Profile lists the documents that will be monitored. Testing of fluids was not included in Test Method D – 95 and earlier versions. Ultimately, all the relevant properties must be evaluated by an engineer, who might find the need to include additional calculations to account for changes in mechanical properties. Need more than one copy?
Standard Test Method for Elastomer Compatibility of Lubricating Greases and Fluids
ASTM D incorporates additional property evaluations, such as work function and compression set, but limits the r4289 duration to only 1, hours. Already Subscribed to this document. This standard is not included in any packages. Already Subscribed to this document. The times vary considerably among manufactures, usually ranging from a week to 30 days. This standard is also available to be included in Standards Subscriptions. The compatibility testing consisted of three main components: Similarly, this test method can be used in specifications for lubricating fluids as well.
Higher temperatures were used for specific high-temperature applications.
Norma ASTM D()e1
For specific warning statements, see 8. Proceed to Checkout Continue Shopping. This was found to be a significant gap in historic testing methods.
Such values may or may not be the same as those of Test Method D If the document is revised or amended, you will be notified by email.
For example, a dynamic seal may be required to retain more of its original properties than a static seal. Engineering 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.
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. Testing of fluids was not included in Test Method D —95 and earlier versions. The base test parameters included volume swell, mass and density changes, hardness, tensile strength, elongation, percent modulus, work function area under tensile curve up to 20 percentcompression set and abrasion resistance.
No other units of measurement are included in this standard. In this respect, this test method is useful for lubricant specifications for example, Specification D It is recommended that the agreed upon precision values be stated in the user’s lubricant specification.
Add to Alert PDF. What this approach fails to address are the interactions between an actual polymer material and the specific formula of a given fluid — including a host of additives and contaminants that often go unaccounted for but significantly alter the equation.
Inasmuch as the precision values apply only to the elastomers specified in Annex A1 of Test Method Adtmwhen a lubricant specification requires some other elastomer, the user and supplier of the lubricant should agree to the values of acceptable precision. In contrast to these two test methods, which emphasize the evaluation of rubber and rubber-like compounds, Test Method D was developed specifically to evaluate lubricating greases and fluids, especially those used in automotive applications, although the test method can be applied to lubricants used in industrial applications as well.
In addition to changes in hardness, the tensile modulus needed to be tracked, as well as percent modulus, tensile strength and elongation at break. Need more than one copy? The scope of this test method now includes the evaluation of the elastomer compatibility of both lubricating fluids and greases. Because some fluids experience chemical changes at higher temperatures, specific temperatures were used to control this.