ASTM C416-97(2007)
(Classification)Standard Classification of Silica Refractory Brick
Standard Classification of Silica Refractory Brick
SIGNIFICANCE AND USE
The presence of certain impurities in silica brick tends to lower their refractoriness and service limits. This classification permits those familiar with refractories to predict the refractoriness of silica brick from their alkali and alumina contents.
SCOPE
1.1 This classification is limited to silica brick meeting the following requirements:Alumina (Al2O 3) content of less than 1.50 %.Titania (TiO2) content of less than 0.20 %.Iron oxide (FeO3) content of less than 2.50 %.Calcium oxide (CaO) content of less than 4.00 %.Average modulus of rupture of not less than 500 psi (3.45 MPa).
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.
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Designation:C416 −97(Reapproved2007)
Standard Classification of
Silica Refractory Brick
This standard is issued under the fixed designation C416; 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 3. Significance and Use
1.1 This classification is limited to silica brick meeting the 3.1 Thepresenceofcertainimpuritiesinsilicabricktendsto
following requirements: lower their refractoriness and service limits. This classification
Alumina (Al O ) content of less than 1.50 %. permits those familiar with refractories to predict the refracto-
2 3
Titania (TiO ) content of less than 0.20 %. riness of silica brick from their alkali and alumina contents.
Iron oxide (FeO ) content of less than 2.50 %.
4. Basis of Classification
Calcium oxide (CaO) content of less than 4.00 %.
Average modulus of rupture of not less than 500 psi (3.45
4.1 FluxFactor —Silica brick are classified on the basis of
MPa).
impurities by the use of a “flux factor,” which is equal to the
percent of alumina plus twice the percent of total alkalies.
1.2 This standard does not purport to address all of the
4.2 Types:
safety concerns, if any, associated with its use. It is the
4.2.1 Type A—Silica brick having a flux factor of 0.50 or
responsibility of the user of this standard to establish appro-
less.
priate safety and health practices and determine the applica-
4.2.2 Type B—All other silica brick falling within the scope
bility of regulatory limitations prior to use.
of this classification.
2. Referenced Documents
5. Test Methods
2.1 ASTM Standards:
5.1 The properties listed in this classification shall be
C133 Test Methods for Cold Crushing Strength and Modu-
determined in accordance with the following ASTM methods:
lus of Rupture of Refractories
5.1.1 Modulus of Rupture—Test Method C133.
5.1.2 Chemical Analysis—XRF and ICP.
NOTE 1—Chemical analysis of refractory products is determined by a
combination of x-ray fluorescence (XRF) and inductively coupled plazma
(ICP) using standard reference materials (SRM), including various types
6. Retests
of minerals and refractory materials that are available from the National
6.1 Because of variables resulting from sampling and the
Institute of Standards and Technology and other appropriate sources.
lack of satisfactory reproducibility in tests conducted by
different laboratories, the material may be resampled and
This classification is under the jurisdiction of ASTM C
...
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:C 416–97 (Reapproved2002) Designation: C 416 – 97 (Reapproved 2007)
Standard Classification of
Silica Refractory Brick
This standard is issued under the fixed designation C 416; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This classification is limited to silica brick meeting the following requirements:
Alumina (Al O ) content of less than 1.50 %.
2 3
Titania (TiO ) content of less than 0.20 %.
Iron oxide (FeO ) content of less than 2.50 %.
Calcium oxide (CaO) content of less than 4.00 %.
Average modulus of rupture of not less than 500 psi (3.45 MPa).
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.
2. Referenced Documents
2.1 ASTM Standards:
C 133 Test Methods for Cold Crushing Strength and Modulus of Rupture of Refractories
NOTE 1—Chemical analysis of refractory products is determined by a combination of x-ray fluorescence (XRF) and inductively coupled plazma (ICP)
using standard reference materials (SRM), including various types of minerals and refractory materials that are available from the National Institute of
Standards and Technology and other appropriate sources.
3. Significance and Use
3.1 The presence of certain impurities in silica brick tends to lower their refractoriness and service limits. This classification
permits those familiar with refractories to predict the refractoriness of silica brick from their alkali and alumina contents.
4. Basis of Classification
4.1 Flux Factor —Silica brick are classified on the basis of impurities by the use of a “flux factor,” which is equal to the
percent of alumina plus twice the percent of total alkalies.
4.2 Types:
4.2.1 Type A—Silica brick having a flux factor of 0.50 or less.
4.2.2 Type B—All other silica brick falling within the scope of this classification.
5. Test Methods
5.1 The properties listed in this classification shall be determined in accordance with the following ASTM methods:
5.1.1 Modulus of Rupture—Test Method C 133.
5.1.2 Chemical Analysis—XRF and ICP.
6. Retests
6.1 Because of variables resulting from sampling and the lack of satisfactory reproducibility in tests conducted by different
laboratories, the material may be resampled and retested when requested by either the manufacturer or the purchaser. This
...
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