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ASTM C730-98(2008)

Historical Reaffirmation

Standard Test Method for<brk type="line"/> Knoop Indentation Hardness of Glass

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1.1 This test method covers the determination of the Knoop indentation hardness of glass and the verification of Knoop indentation hardness testing machines using standard glasses.

1.2 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.

The Knoop indentation hardness is one of many properties that is used to characterize glasses. Attempts have been made to relate Knoop indentation hardness to tensile strength, grinding speeds, and other hardness scales, but no generally accepted methods are available. Such conversions are limited in scope and should be used with caution, except for special cases where a reliable basis for the conversion has been obtained by comparison tests.

SDO ASTM: ASTM International
Document Number C730
Publication Date April 1, 2008
Language en - English
Page Count 5
Revision Level 98(2008)
Supercedes
Committee C14.04
Publish Date Document Id Type View
Oct. 10, 1998 C0730-98 Revision
Jan. 1, 2021 C0730-98R21 Reaffirmation
Oct. 1, 2013 C0730-98R13 Reaffirmation
April 1, 2008 C0730-98R08 Reaffirmation
Oct. 10, 1998 C0730-98R03 Reaffirmation