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Historical Revision

ASTM C849-88(2006)

Standard Test Method for Knoop Indentation Hardness of Ceramic Whitewares
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1.1 This test method covers the determination of the Knoop indentation hardness of ceramic whitewares and the verification of Knoop indentation hardness testing machines using standard glasses.

1.2 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems 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.

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

1.2 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems 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 ceramic whitewares. 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 C849
Publication Date Feb. 15, 2006
Language en - English
Page Count 5
Revision Level 88(2006)
Supercedes
Committee C21.03
Publish Date Document Id Type View
June 1, 2025 C0849-88R25 Revision
Nov. 1, 2020 C0849-88R20 Revision
July 1, 2016 C0849-88R16 Revision
March 1, 2011 C0849-88R11 Revision
Feb. 15, 2006 C0849-88R06 Revision
Oct. 10, 1999 C0849-88R99 Revision