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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It is recommended that the agreed upon precision values be stated in the user’s lubricant specification. Xstm to Checkout Continue Shopping. The times vary considerably among manufactures, usually ranging from a week to 30 days.
Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. For specific warning statements, see 8. Similarly, this test method can be used in specifications for lubricating fluids as well.
As the voice of the U. The compatibility testing consisted of three main components: Historical Version s – view previous versions of standard. Note The scope of this test method now includes the evaluation of the elastomer compatibility of both lubricating fluids and greases.
Standards Subsctiption may be the perfect solution. This standard is not included in any packages.
ASTM D – 03 Standard Test Method for Elastomer Compatibility of Lubricating Greases and Fluids
Some of the tests were performed by customer request, while others were conducted to round out the research and record for future use. Testing of fluids was not included in Test Method D – 95 and earlier versions. 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.
Several of the fluid-material combinations that passed successfully within 28 days failed after longer exposures. Virtually all other equipment and supplies specified in the procedure are stock items in lubricants laboratories. 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.
Traditional methods to determine elastomer seal compatibility with specific fluids have for decades produced misleading results, according to a new research from System Seals Laboratories.
ASTM D4289 – 13(2014)e1
Please first log in with a verified email before subscribing to alerts. In this respect, this test method is useful for lubricant specifications for example, Specification D 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.
Your Alert Profile lists the documents that will be monitored. Emulsions at higher temperatures, for example, tended to demulsify, and biodegradable fluids acidified.
Chemical Compatibility Study Reveals Shortfalls in Standard Testing Methods
For example, a dynamic seal may be required to retain more of its original properties than a static seal. Need more than one copy? Two HNBRs, for instance, might demonstrate different property changes depending on the levels of fillers and additives. For specific warning statements, see 8. To fully assess dimensional changes from chemical aatm, other characteristics are monitored as well, such as volume, thickness and density.
As the voice of the Wstm. Please first verify your email before subscribing to alerts. 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. These results are limited for a number of reasons.
Similarly, this test method can be used in specifications for lubricating fluids as well. Most test standards also do not incorporate changes in the transition temperature, which is critical for low-temperature applications.
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. Because some fluids experience chemical changes at higher temperatures, specific temperatures were used to control this. 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.
Excepting the Shore Durometer A, this test method requires no specialized, rubber-testing equipment. Theoretical models that have been established to predict fluid compatibility are based largely on the laws of chemistry. Add to Alert PDF. This significantly extended most of the industry standards, which rely on an average duration of about a month.
Subscription pricing is determined by: Such values may or may not be the same as those of Test Method D