ASTM C455-07(2013)

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 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Aug-2013
• ICS: 81.080 - Refractories
• Technical Committee: C08 - Refractories
• Drafting Committee: C08.92 - The Joseph E. Kopanda Subcommittee for Editorial, Terminology and Classification

Relations

• Replaces: ASTM C455-07 - Standard Classification of Chrome, Chrome-Magnesia, Magnesia-Chrome, and Magnesia Brick
• Effective Date: 01-Sep-2013

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: C455 −07 (Reapproved 2013)
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 4. Significance and Use
4.1 This classification categorizes the defined types of
1.1 This classification categorizes machine-made refractory
refractory brick, with the exception of chrome brick, into
brick defined as chrome, chrome-magnesia, magnesia-chrome,
distinct classes based on a nominal and minimal value for
and magnesia brick (see 3.1). It does not cover products made
magnesium oxide content. Chrome brick are treated as a
from electrically fused magnesium oxide or to products made
separate class without reference to magnesium oxide content.
by fusion casting. Its purpose is to describe classes distin-
Such classes have historically been generally useful in relating
guished by obvious differences in magnesium oxide (MgO)
the defined types to specific industrial applications and in
content except for chrome brick.
developing product or purchasing specifications.
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Basis of Classification
responsibility of the user of this standard to establish appro-
5.1 Chrome-magnesia, magnesia-chrome, and magnesia
priate safety and health practices and determine the applica-
brick are classified by MgO content as shown in Table 1.
bility of regulatory limitations prior to use.
Chrome brick is not classified by MgO content (see Table 1).
6. Test Methods
2. Referenced Documents
6.1 The determination of MgO on an ignited basis as
2.1 ASTM Standards:
required by this classification shall be determined by a com-
C71 Terminology Relating to Refractories
bination of x-ray fluorescence (XRF) and inductively coupled
NOTE 1—Chemical analysis of refractory product is determined by a
plasma (ICP) using standard reference materials (SRM), in-
combination of x-ray fluorscence (XRF) and inductively coupled plasma
cluding various types of minerals and refractory materials
(ICP) using standard reference materials (SRM), including various types
which are available from the National Institute of Standards
of minerals and refractory materials which are available from the National
Institute of Standards and Technology and other appropriate sources.
and Technology and other appropriate sources.
7. Retests
3. Terminology
7.1 Because of variables resulting from sampling and the
3.1 For definitions of terms used in this classification, see
lack of satisfactory reproducibility in tests conducted by
Terminology C71.
different laboratories, the material may be resampled and
retested when requested by either the manufacturer or the
purchaser. This may
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