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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But volume swell does not indicate chemical reaction on its own. For specific warning statements, see 8.
Although some guidelines can be used to make engineering decisions, these values could be flexible or rigid, depending on the application. We have no amendments or corrections for this standard. 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.
This means that a quarter of all tests commonly performed throughout the industry for 28 days will likely asm false results. Developing New Test Methods To fully evaluate awtm compatibility, System Seals developed new methods from various standards, as well as experience from seals in broad applications.
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. Already Subscribed to this document. Even when exposure times are sufficiently long, the evaluations might be limited to measuring changes in only volume and hardness.
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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. Still, there are considerable inconsistencies among these tests. E4289 may delete a document from your Alert Profile at any time.
Note The scope of this test method now includes the evaluation of the elastomer compatibility of both lubricating fluids and greases. This standard is also available to be included in Standards Subscriptions. Higher temperatures were used for specific high-temperature applications. Virtually all other equipment and supplies specified in the procedure are stock items in lubricants laboratories. Results of the extended tests were startling.
You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. If the document is revised or amended, you will be notified by email. 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.
Excepting the Shore Durometer A, this test method requires no specialized, rubber-testing equipment.
Such values may or may not be the same as those v4289 Test Method D In most cases, testing reveals little to no information about any actual changes in material properties. Need more than one copy? 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. This standard is not included in any packages.
For example, a dynamic seal may be required to retain more of its original properties than a static seal.
Standards Subsctiption may be the perfect solution. Testing of fluids was not included in Test Method D —95 and earlier versions.
In addition to changes in hardness, the tensile modulus needed to be tracked, as well as percent modulus, tensile strength and elongation at break. In critical applications where the lubricant will be in contact with rubber parts subject to astmm 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.
Volume swell is a good indicator of fluid absorption, which is important because many seal grooves have between v4289 free space available. If the document is revised or amended, you will be notified by email.
Chemical Compatibility Study Reveals Shortfalls in Standard Testing Methods – System Seals Inc.
You may delete a document from your Alert Profile at any time. Your Alert Profile lists the documents that will be monitored. This standard is not included in any packages.
Your Alert Profile lists the documents that will be monitored. Excepting the Shore Durometer A, this test method requires no specialized, rubber-testing equipment. No other units of measurement are included in this standard. This significantly extended most of the industry standards, which rely on an average duration of about a month.