ASTM C467-14

Standard Classification of Mullite Refractories

SIGNIFICANCE AND USE
3.1 The mullite content of an alumina-silica refractory material has an important influence on volume stability, load bearing properties, and its satisfactory use in refractory applications. This classification is considered useful for purchase specifications and quality control.
SCOPE
1.1 This classification covers refractory products consisting predominantly of mullite (3 Al2O3·2 SiO2) crystals that are formed by either converting any of the sillimanite group of minerals, or synthesizing from appropriate materials in a melt or sinter process.  
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.

General Information

• Status: Historical
• Publication Date: 31-Aug-2014
• 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 C467-97(2008) - Standard Classification of Mullite Refractories
• Effective Date: 01-Sep-2014

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:C467 −14
Standard Classification of
1
Mullite Refractories
This standard is issued under the fixed designation C467; 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. Basis of Classification
1.1 This classification covers refractory products consisting 4.1 The refractory products falling within the scope of this
predominantly of mullite (3 Al O ·2 SiO ) crystals that are classification are classified by chemical and physical tests to
2 3 2
formed by either converting any of the sillimanite group of meet the following requirements:
minerals, or synthesizing from appropriate materials in a melt
Alumina content, % 56 to 79
A
Impurities, max, % 5
or sinter process.
B
Deformation, max, %
5
1.2 The values stated in inch-pound units are to be regarded
A
as standard. The values given in parentheses are mathematical
Impurities refer to metal oxides other than those of aluminum and silicon.
B
When tested in accordance with 6.1.2.
conversions to SI units that are provided for information only
and are not considered standard.
5. Test Specimens
2. Referenced Documents
5.1 Testing for compliance with this classification shall be
1 1
2
performed on 9 by 4 ⁄2 by 2 ⁄2-in. (228 by 114 by 64-mm)
2.1 ASTM Standards:
rectangular brick as made, or on specimens of this size cut
C16 Test Method for Load Testing Refractory Shapes at
from larger shapes, utilizing existing plane surfaces as much as
High Temperatures
possible.
NOTE 1—Chemical analysis of refractory products are determined by a
combination of x-ray fluorscence (XRF) and inductively coupled plazma
6. Test Methods
(ICP) using standard reference materials (SRM), including various types
of minerals and refractory materials which are available from the National 6.1 The properties enumerated in this classification shall be
Institute of Standards and Technology and other appropriate sources.
determined in accordance with the following ASTM meth-
C832 Test Method of Measuring Thermal Expansion and
ods:
Creep of Refractories Under Load
6.1.1 Alumina Content—XRF and ICP.
6.1.2 LoadTest—Schedule 6 ofTable 1 inTest Method C16.
3. Significance and Use
6.1.3 Thermal Expansion and Creep—Method C832.
3.1 The mullite content of an alumina-silica refractory
7. Retests
material has an important influence on volume stability, load
bearing properties, and its satisfactory use in refractory appli-
7.1 Because of possible variables that may result from
cations. This classification is considered useful for purchase
sampling or an unsatisfactory reprodu
...

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: C467 − 97 (Reapproved 2008) C467 − 14
Standard Classification of
1
Mullite Refractories
This standard is issued under the fixed designation C467; 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 refractory products consisting predominantly of mullite (3 Al O ·2 SiO ) crystals that are formed
2 3 2
by either converting any of the sillimanite group of minerals, or synthesizing from appropriate materials in a melt or sinter process.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
C16 Test Method for Load Testing Refractory Shapes at High Temperatures
NOTE 1—Chemical analysis of refractory products are determined by a combination of x-ray fluorscence (XRF) and inductively coupled plazma (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.
C832 Test Method of Measuring Thermal Expansion and Creep of Refractories Under Load
3. Significance and Use
3.1 The mullite content of an alumina-silica refractory material has an important influence on volume stability, load bearing
properties, and its satisfactory use in refractory applications. This classification is considered useful for purchase specifications and
quality control.
4. Properties Basis of Classification
4.1 The refractory products falling within the scope of this classification are classified by chemical and physical tests to meet
the following requirements:
Alumina content, % 56 to 79
A
Impurities, max, % 5
B
Deformation, max, %
5
A
Impurities refer to metal oxides other than those of aluminum and silicon.
B
When tested in accordance with 6.1.2.
5. Test Specimens
1 1
5.1 Testing for compliance with this classification shall be performed on 9 by 4 ⁄2 by 2 ⁄2-in. (228 by 114 by 64-mm) rectangular
brick as made, or on specimens of this size cut from larger shapes, utilizing existing plane surfaces as much as possible.
6. Test Methods
6.1 The properties enumerated in this classification shall be determined in accordance with the following ASTM meth-
ods:
6.1.1 Alumina Content—XRF and ICP.
6.1.2 Load Test—Schedule 6 of Table 1 in Test Method
...