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ASTM Specifications
 Most
quality manufacturers of Orings specify the physical properties
of their product through ASTM (American Society of Testing
and Materials) and/or SAE (Society of Automotive Engineers)
designations. The purpose of doing so is to provide a standardized
method of calling-out the required physical properties of
a rubber product, based primarily on its Type (Heat Resistance)
and Class (Oil Resistance). An example of an ASTM Specification
for a general purpose, sulfur-cured, 70 Duro Nitrile may be:
ASTM D2000-99 M2BG714 B14 EA14 EF11
EF21 EO34 Z1
How to read this ASTM call-out?
What Elastomer is called-out by
the Type and the Class?
What are the relative Heat (Type)
and Oil (Class) Resistance properties of popular elastomers?
What does the letter in the suffix requirements mean?
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