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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 .
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 and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D374 Test Methods for Thickness of Solid Electrical Insulation (Metric) D0374_D0374M
D618 Practice for Conditioning Plastics for Testing
D785 Test Method for Rockwell Hardness of Plastics and Electrical Insulating Materials
D1349 Practice for Rubber--Standard Conditions for Testing
D1415 Test Method for Rubber Property--International Hardness
D4483 Practice for Evaluating Precision for Test Method Standards in the Rubber and Carbon Black Manufacturing Industries
F1957 Test Method for Composite Foam Hardness-Durometer Hardness
ISO StandardISO/IEC17025: 1999 General Requirements for the Competence of Testing and Calibration Laboratories
ICS Number Code 83.060 (Rubber)
UNSPSC Code 41114611(Hardness testers)
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ASTM D2240-15, Standard Test Method for Rubber Property—Durometer Hardness, ASTM International, West Conshohocken, PA, 2015, www.astm.orgBack to Top