ASTM C545-97(2018)
(Classification)Standard Classification of Zircon Refractories
Standard Classification of Zircon Refractories
SIGNIFICANCE AND USE
3.1 The zircon content and bulk density of a zirconia-silica refractory material have important influences on chemical resistance and its satisfactory use in refractory applications. This classification is considered useful for purchase specifications and quality control.
SCOPE
1.1 This classification covers fired refractory brick and shapes consisting predominantly of zircon (ZrO2·SiO2) and containing, by chemical analysis, not less than 60 % zirconium oxide (ZrO2) and not less than 30 % silica (SiO2).
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.
1.3 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.
General Information
Buy Standard
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C545 −97 (Reapproved 2018)
Standard Classification of
Zircon Refractories
This standard is issued under the fixed designation C545; 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 (´) indicates an editorial change since the last revision or reapproval.
(ICP) using standard reference materials (SRM), including various types
1. Scope
of minerals and refractory materials which are available from the National
1.1 This classification covers fired refractory brick and
Institute of Standards and Technology and other appropriate sources.
shapes consisting predominantly of zircon (ZrO ·SiO ) and
2 2
3. Significance and Use
containing, by chemical analysis, not less than 60 % zirconium
oxide (ZrO ) and not less than 30 % silica (SiO ).
2 2 3.1 The zircon content and bulk density of a zirconia-silica
refractory material have important influences on chemical
1.2 The values stated in inch-pound units are to be regarded
resistance and its satisfactory use in refractory applications.
as standard. The values given in parentheses are mathematical
This classification is considered useful for purchase specifica-
conversions to SI units that are provided for information only
tions and quality control.
and are not considered standard.
1.3 This international standard was developed in accor-
4. Basis of Classification
dance with internationally recognized principles on standard-
4.1 Types:
ization established in the Decision on Principles for the
4.1.1 Type A (Regular)—Zircon refractories having a bulk
Development of International Standards, Guides and Recom-
3 3
density of less than 240 lb/ft (3.84 g/cm ).
mendations issued by the World Trade Organization Technical
4.1.2 Type B (Dense)—Zircon refractories having a bulk
Barriers to Trade (TBT) Committee.
3 3
density of 240 lb/ft (3.84 g/cm ) or more.
2. Referenced Documents
5. Test Methods
2.1 ASTM Standards:
5.1 The properties listed in this classification shall be
C20 Test Methods for Apparent Porosity, Water Absorption,
determined by the following ASTM methods:
Apparent Specific Gravity, and Bulk Density of Burned
5.1.1 Bulk Density—Test Methods C20 or C830.
Refractory Brick and Shapes by Boiling Water
5.1.2 Chemical Analysis—XRF and ICP.
C830 Test Methods for Apparent Porosity, Liquid
Absorption, Apparent Specific Gravity, and Bulk Density
6. Retests
of Refractory Shapes by Vacuum Pressure
6.1 Because of variables resulting from sampling and the
NOTE 1—Chemical analysis of refractory products is determined by a
lack of satisfactory reproducibility in tests conducted by
combination of X-ray fluorescen
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C545 − 97 (Reapproved 2013) C545 − 97 (Reapproved 2018)
Standard Classification of
Zircon Refractories
This standard is issued under the fixed designation C545; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This classification covers fired refractory brick and shapes consisting predominantly of zircon (ZrO ·SiO ) and containing,
2 2
by chemical analysis, not less than 60 % zirconium oxide (ZrO ) and not less than 30 % silica (SiO ).
2 2
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.
1.3 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.
2. Referenced Documents
2.1 ASTM Standards:
C20 Test Methods for Apparent Porosity, Water Absorption, Apparent Specific Gravity, and Bulk Density of Burned Refractory
Brick and Shapes by Boiling Water
C830 Test Methods for Apparent Porosity, Liquid Absorption, Apparent Specific Gravity, and Bulk Density of Refractory Shapes
by Vacuum Pressure
NOTE 1—Chemical analysis of refractory products areis determined by a combination of x-rayX-ray fluorescence (XRF) and inductively coupled
plazmaplasma (ICP) using standard reference materials (SRM), including various types of minerals and refractory materials which are available from the
National Institute of Standards and Technology and other appropriate sources.
C830 Test Methods for Apparent Porosity, Liquid Absorption, Apparent Specific Gravity, and Bulk Density of Refractory Shapes
by Vacuum Pressure
3. Significance and Use
3.1 The zircon content and bulk density of a zirconia-silica refractory material have important influences on chemical resistance
and its satisfactory use in refractory applications. This classification is considered useful for purchase specifications and quality
control.
4. Basis of Classification
4.1 Types:Types:
3 3
4.1.1 Type A (Regular)—Zircon refractories having a bulk density of less than 240 lb/ft (3.84 g/cm ).
3 3
4.1.2 Type B (Dense)—Zircon refractories having a bulk density of 240 lb/ft (3.84 g/cm ) or more.
5. Test Methods
5.1 The properties listed in this classification shall be determined by the fo
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.