1.1 This test method covers twelve types of rubber hardness measurement devices known as durometers: Types A, B, C, D, DO, E, M, O, OO, OOO, OOO-S, and R. The procedure for determining indentation hardness of substances classified as thermoplastic elastomers, vulcanized (thermoset) rubber, elastomeric materials, cellular materials, gel-like materials, and some plastics is also described.
1.2 This test method is not equivalent to other indentation hardness methods and instrument types, specifically those described in Test Method D1415.
1.3 This test method is not applicable to the testing of coated fabrics.
1.4 All materials, instruments, or equipment used for the determination of mass, force, or dimension shall have traceability to the National Institute for Standards and Technology, or other internationally recognized organizations parallel in nature.
1.5 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. Many of the stated dimensions in SI are direct conversions from the U. S. Customary System to accommodate the instrumentation, practices, and procedures that existed prior to the Metric Conversion Act of 1975.
1.6 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.7 This 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.
ASTM D2240-15(2021) Referenced Document
ASTM D1349 Standard Practice for Rubber-Standard Temperatures for Testing
ASTM D1415 Standard Test Method for Rubber Property—International Hardness
ASTM D374 Standard Test Methods for Thickness of Solid Electrical Insulation
ASTM D4483 Standard Practice for Determining Precision for Test Method Standards in the Rubber and Carbon Black Industries
ASTM D618 Standard Practice for Conditioning Plastics for Testing
ASTM D785 Standard Test Method for Rockwell Hardness of Plastics and Electrical Insulating Materials
ASTM F1957 Standard Test Method for Composite Foam Hardness-Durometer Hardness
ASTM D2240-15(2021) history
2021ASTM D2240-15(2021) Standard Test Method for Rubber Property—Durometer Hardness
2017ASTM D2240-15e1 Standard Test Method for Properties of Rubber &8212; Durometer Hardness
2015ASTM D2240-15 Standard Test Method for Rubber Property&x2014;Durometer Hardness
2005ASTM D2240-05(2010) Standard Test Method for Rubber Property8212;Durometer Hardness
2005ASTM D2240-05 Standard Test Method for Rubber Property8212;Durometer Hardness
2004ASTM D2240-04e1 Standard Test Method for Rubber Property8212;Durometer Hardness
2004ASTM D2240-04 Standard Test Method for Rubber Property8212;Durometer Hardness
2003ASTM D2240-03 Standard Test Method for Rubber Property8212;Durometer Hardness
2002ASTM D2240-02b Standard Test Method for Rubber Property8212;Durometer Hardness
2002ASTM D2240-02a Standard Test Method for Rubber Property8212;Durometer Hardness
2002ASTM D2240-02 Standard Test Method for Rubber Property—Durometer Hardness
2000ASTM D2240-00 Standard Test Method for Rubber Property8212;Durometer Hardness