ASTM International - ASTM C748-20

Standard Test Method for Rockwell Hardness of Graphite Materials

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Organization: ASTM International
Publication Date: 1 May 2020
Status: active
Page Count: 3
ICS Code (Chemical elements): 71.060.10
significance And Use:

4.1 A Rockwell L scale hardness number is a number derived from the net increase in depth of impression as the load on a 6.3500 mm ± 0.0025 mm diameter steel-ball indenter is increased... View More

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 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.

Document History

ASTM C748-20
May 1, 2020
Standard Test Method for Rockwell Hardness of Graphite Materials
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...
October 1, 2015
Standard Test Method for Rockwell Hardness of Graphite Materials
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...
May 1, 2010
Standard Test Method for Rockwell Hardness of Graphite Materials
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...
May 1, 2005
Standard Test Method for Rockwell Hardness of Graphite Materials
1.1 This test method covers Rockwell L scale hardness testing of graphite materials with grain size less than 0.8 m (0.032 in.) and a hardness range between 0 and 120. 1.2 Test Methods E 18 shall be...
March 10, 1998
Standard Test Method for Rockwell Hardness of Graphite Materials
1.1 This test method covers Rockwell L scale hardness testing of fine-grained graphite materials with grain size less than 0.8 m ( 1/32 in.) and a hardness range between 0 and 120. 1.2 Test Methods...
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