5.1 Tests made on materials herein prescribed have the potential to give considerable value in comparing physical properties of different materials, in controlling manufacturing processes, and as a basis for writing specifications.

5.2 Before proceeding with these test methods, if appropriate, make reference to the specification associated with the material or product being tested. Any test specimen preparation, conditioning, dimensions, testing parameters, or combination thereof, covered in the ASTM materials or product specification shall take precedence over those mentioned in these test methods. If there are no relevant ASTM specifications, then the default conditions apply.

1.1 These test methods cover the preparation of a standard-size test sample and basic tests for physical property determinations of microcellular urethane materials.

1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.