ASTM C455-07(2018)
(Classification)Standard Classification of Chrome, Chrome-Magnesia, Magnesia-Chrome, and Magnesia Brick
Standard Classification of Chrome, Chrome-Magnesia, Magnesia-Chrome, and Magnesia Brick
SIGNIFICANCE AND USE
4.1 This classification categorizes the defined types of refractory brick, with the exception of chrome brick, into distinct classes based on a nominal and minimal value for magnesium oxide content. Chrome brick are treated as a separate class without reference to magnesium oxide content. Such classes have historically been generally useful in relating the defined types to specific industrial applications and in developing product or purchasing specifications.
SCOPE
1.1 This classification categorizes machine-made refractory brick defined as chrome, chrome-magnesia, magnesia-chrome, and magnesia brick (see 3.1). It does not cover products made from electrically fused magnesium oxide or products made by fusion casting. Its purpose is to describe classes distinguished by obvious differences in magnesium oxide (MgO) content except for chrome brick.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
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
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Designation: C455 −07 (Reapproved 2018)
Standard Classification of
Chrome, Chrome-Magnesia, Magnesia-Chrome, and
Magnesia Brick
This standard is issued under the fixed designation C455; 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. Terminology
3.1 For definitions of terms used in this classification, see
1.1 This classification categorizes machine-made refractory
Terminology C71.
brick defined as chrome, chrome-magnesia, magnesia-chrome,
and magnesia brick (see 3.1). It does not cover products made
4. Significance and Use
from electrically fused magnesium oxide or products made by
fusion casting. Its purpose is to describe classes distinguished
4.1 This classification categorizes the defined types of
by obvious differences in magnesium oxide (MgO) content
refractory brick, with the exception of chrome brick, into
except for chrome brick.
distinct classes based on a nominal and minimal value for
magnesium oxide content. Chrome brick are treated as a
1.2 This standard does not purport to address all of the
separate class without reference to magnesium oxide content.
safety concerns, if any, associated with its use. It is the
Such classes have historically been generally useful in relating
responsibility of the user of this standard to establish appro-
the defined types to specific industrial applications and in
priate safety, health, and environmental practices and deter-
developing product or purchasing specifications.
mine the applicability of regulatory limitations prior to use.
1.3 This international standard was developed in accor-
5. Basis of Classification
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5.1 Chrome-magnesia, magnesia-chrome, and magnesia
Development of International Standards, Guides and Recom- brick are classified by MgO content as shown in Table 1.
mendations issued by the World Trade Organization Technical Chrome brick is not classified by MgO content (see Table 1).
Barriers to Trade (TBT) Committee.
6. Test Methods
2. Referenced Documents
6.1 The determination of MgO on an ignited basis as
required by this classification shall be determined by a com-
2.1 ASTM Standards:
bination of X-ray fluorescence (XRF) and inductively coupled
C71 Terminology Relating to Refractories
plasma (ICP) using standard reference materials (SRM), in-
NOTE 1—Chemical analysis of refractory product is determined by a
cluding various types of minerals and refractory materials
combination of X-ray fluorscence (XRF) and inductively coupled plasma
which are available from the National Institute of Standards
(ICP) using standard reference materials (SRM), including various types
and Technology and other appropriate sources.
of minerals and refractory materials which are available from the National
Institute of Standards and Technology and other appropriate sources.
7. Retests
7.1 Because of variables resulting from sampling and the
This classification is under the jurisdiction of ASTM Committee C08 on
lack of satisfactory reproducibilit
...
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: C455 − 07 (Reapproved 2013) C455 − 07 (Reapproved 2018)
Standard Classification of
Chrome, Chrome-Magnesia, Magnesia-Chrome, and
Magnesia Brick
This standard is issued under the fixed designation C455; 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 categorizes machine-made refractory brick defined as chrome, chrome-magnesia, magnesia-chrome, and
magnesia brick (see 3.1). It does not cover products made from electrically fused magnesium oxide or to products made by fusion
casting. Its purpose is to describe classes distinguished by obvious differences in magnesium oxide (MgO) content except for
chrome brick.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
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:
C71 Terminology Relating to Refractories
NOTE 1—Chemical analysis of refractory product is determined by a combination of x-rayX-ray fluorscence (XRF) and inductively coupled plasma
(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.
3. Terminology
3.1 For definitions of terms used in this classification, see Terminology C71.
4. Significance and Use
4.1 This classification categorizes the defined types of refractory brick, with the exception of chrome brick, into distinct classes
based on a nominal and minimal value for magnesium oxide content. Chrome brick are treated as a separate class without reference
to magnesium oxide content. Such classes have historically been generally useful in relating the defined types to specific industrial
applications and in developing product or purchasing specifications.
5. Basis of Classification
5.1 Chrome-magnesia, magnesia-chrome, and magnesia brick are classified by MgO content as shown in Table 1. Chrome brick
is not classified by MgO content (see Table 1).
6. Test Methods
6.1 The determination of MgO on an ignited basis as required by this classification shall be determined by a combination of
x-rayX-ray fluorescence (XRF) and inductively coupled plasma (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.
This classification is under the jurisdiction
...
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