ASTM D 2990 : 2017 : R2025

1.1These test methods cover the determination of tensile and compressive creep and creep-rupture of plastics under specified environmental conditions (see 3.2).

1.2In these test methods three-point loading, as described in Test Methods D790, is used for measurement of creep in flexure. However, four-point loading using the equipment and principles described in D6272 is also permitted as an option.

1.3For measurements of creep-rupture, tension is the preferred stress mode because for some ductile plastics rupture does not occur in flexure or compression.

1.4Test data obtained by these test methods are relevant and appropriate for use in engineering design.

1.5The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.

1.6This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. A specific warning statement is given in 6.8.2.

1.7This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.