英文名称：
ASTM C748-98R2015
Standard Test Method for Rockwell Hardness of Graphite Materials
中文名称：
ASTM C748-98R2015
石墨材料洛氏硬度的标准试验方法
代号说明：
This standard is issued under the fixed designation C748; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (ε) indicates an editorial change since the last revision or reapproval.
版本说明：
1 This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee D02.F0 on Manufactured Carbon and Graphite Products.
Current edition approved Oct. 1, 2015. Published December 2015. Originally approved in 1973. Last previous edition approved in 2010 as C748–98 (2010)ɛ1 . DOI: 10.1520/C0748-98R15.
2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website.
3 Supporting data have been filed at ASTM International Headquarters and may be obtained by requesting Research Report RR:C05-1007.
标准正文：
1. Scope
1.1 This test method covers Rockwell L scale hardness testing of graphite materials with grain size less than 0.8 mm and a hardness range between 0 and 120.
1.2 Test Methods E18 shall be followed except where otherwise indicated.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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
2.1 ASTM Standards:
E18 Test Methods for Rockwell Hardness of Metallic Materials
E171 Practice for Conditioning and Testing Flexible Barrier Packaging
3. Summary of Test Method
3.1 The specimen is held in position and the load is applied. Final position of the indicator on the scale is observed and recorded as the hardness number.
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