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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To fully evaluate material-fluid compatibility, System Seals developed new methods from various standards, as well as experience from seals in broad applications.
This should include parameters to accelerate the effects of pressure, temperature and surface finish, as well as motion, such as reciprocating, rotary and swivel. 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.
For specific warning statements, see 8. 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 or oC or as required by the lubricant specification. In most cases, testing reveals little to no information about any actual changes in material properties.
For specific warning statements, see 8. And in many test recommendations, there are no established guidelines for static or dynamic applications. During the testing it became necessary to understand how the mechanical properties changed from exposure.
Your Alert Profile lists the documents that will be monitored. Developing New Test Methods To fully evaluate material-fluid compatibility, System Seals developed new methods from various standards, as well as experience from seals in broad applications.
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Volume swell is a good indicator of fluid absorption, which is important because many seal grooves have between percent free space available. In this respect, this test method is useful for lubricant specifications for example, Specification D ASTM D s4289 additional property evaluations, such as work function and compression set, but limits the test duration to only 1, hours.
An increase in mass might also indicate fluid absorption, and a loss in mass usually ast, chemical degradation.
Proceed to Checkout Continue Shopping. Approximately 25 percent of the material-fluid combinations that successfully passed at the day mark, soon began to fail near or after 60 days. However, they can be correlated in many instances.
We have no amendments or corrections for this standard. Please first verify your email before subscribing to alerts. We have no amendments or corrections for this standard.
Ast the document is revised or amended, you will be notified by email. Your Alert Profile lists the documents that will be monitored.
You may delete a document from your Alert Profile at any time. If the document is revised or amended, you will be notified by email. 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.
ASTM D – Standard Test Method for Elastomer Compatibility of Lubricating Greases and Fluids
This significantly extended most of the industry standards, which rely on an average duration of about a month. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Already Subscribed to this document. The ultimate purpose of a chemical compatibility program is to evaluate the dd4289 of an elastomer to function as a seal in its intended application when exposed to a working fluid. Simple rankings and broad generalizations about seal properties and related families are inadequate for effective engineering purposes.
Friction, wear and motion can contribute to additional failure risks.
Standard Test Method for Elastomer Compatibility of Lubricating Greases and Fluids
You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. Inasmuch as the precision values apply only to the elastomers specified in Annex A1 of Test Method Dwhen a lubricant specification requires some other elastomer, the user and supplier of the lubricant should agree to the values of acceptable precision.
ASTM D, for instance, typically incorporates axtm with a maximum exposure time of 70 hours, which significantly limits long-term predictive capabilities. In the System Seals trials, all of the materials underwent additional testing, included breaking points, tensile strength, elongation, volume swell, abrasion resistance and hardness — all qualities required for safe seal performance and longevity. Excepting the Shore Durometer A, this test method requires no specialized, rubber-testing equipment.
No other units v4289 measurement are included in this standard. 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. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.
Virtually all other equipment and supplies specified in the procedure are stock items in lubricants laboratories. These d4298 treating long polymers chains as super-condensed gasses and then defining their empirical values. In critical applications where the lubricant will be in contact with atm 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.