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Description of ASTM-C749 2013ASTM C749-13Historical Standard: Standard Test Method for Tensile Stress-Strain of Carbon and GraphiteASTM C749Scope 1.1 This test method covers the testing of carbon and graphite in tension to obtain the tensile stress-strain behavior, to failure, from which the ultimate strength, the strain to failure, and the elastic moduli may be calculated as may be required for engineering applications. Table 2 lists suggested sizes of specimens that can be used in the tests.
TABLE 1 List of Materials Shown in Fig. 2
A 1 in. is equal to 25.4 mm.
B Preload chain to yield using a load time recording.
C Commercially available.
D Or alternative high strength stainless steel.
TABLE 2 Sample Sizes Used in Round-Robin Tests (Suggested Specimen Size)A
A Based on Research Report RR:C05-1000 (see Section 11).
B Identity of suppliers available from ASTM International Headquarters.
C Gas-bearings.
Note 1—The results of about 400 tests, on file at ASTM as a research report, show the ranges of materials that have
been tested, the ranges of specimen configurations, and the agreement between the testers. See Section 11.
Note 2—For safety considerations, it is recommended that the chains be surrounded by suitable members so that at
failure all parts of the load train behave predictably and do not constitute a hazard for the operator.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Conversions are not provided in the tables and figures. 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. Keywords carbon; graphite; modulus of elasticity; tensile strain to failure; tensile strength ICS Code ICS Number Code 71.060.10 (Chemical elements) DOI: 10.1520/C0749-13 The following editions for this book are also available...
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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