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ASTM C417-05

(Test Method)

Standard Test Method for Thermal Conductivity of Unfired Monolithic Refractories

Standard Test Method for Thermal Conductivity of Unfired Monolithic Refractories

SIGNIFICANCE AND USE
The thermal conductivity of monolithic refractories is a property required for selecting their thermal transmission characteristics. Users select monolithic refractories to provide specified conditions of heat loss and cold face temperature, without exceeding the temperature limitation of the monolithic refractory. This test method establishes placement of thermocouples and positioning of test specimens in the calorimeter.
This procedure must be used with Test Method C 201 and requires a large thermal gradient and steady state conditions. The results are based upon a mean temperature.
The data from this test method are suitable for specification acceptance, estimating heat loss and surface temperature, and the design of multi-layer refractory construction.
The use of these data requires consideration of the actual application environment and conditions.
SCOPE
1.1 This test method supplements Test Method C201, and shall be used in conjunction with that test method for determining the thermal conductivity of unfired monolithic refractories.  
1.2 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are provided for information only.  
1.3 This standard does not purport to address all of the safety problems, 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
30-Nov-2005
ICS
81.080 - Refractories
Technical Committee
C08 - Refractories
Drafting Committee
C08.02 - Thermal Properties
Current Stage
Ref Project

Relations

Replaces
ASTM C417-93(1998) - Standard Test Method for Thermal Conductivity of Unfired Monolithic Refractories
Effective Date
01-Dec-2005
Replaced By
ASTM C417-05(2010)e1 - Standard Test Method for Thermal Conductivity of Unfired Monolithic Refractories
Effective Date
01-Apr-2010
Referred By
ASTM C201-93(2019)e1 - Standard Test Method for Thermal Conductivity of Refractories
Effective Date
01-Dec-2005

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ASTM C417-05 - Standard Test Method for Thermal Conductivity of Unfired Monolithic RefractoriesASTM C417-05 - Standard Test Method for Thermal Conductivity of Unfired Monolithic Refractories
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ASTM C417-05 - Standard Test Method for Thermal Conductivity of Unfired Monolithic Refractories
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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: C417 – 05
Standard Test Method for
1
Thermal Conductivity of Unfired Monolithic Refractories
This standard is issued under the fixed designation C417; 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 refractory. This test method establishes placement of thermo-
couples and positioning of test specimens in the calorimeter.
1.1 This test method supplements Test Method C201, and
3.2 This procedure must be used with Test Method C201
shall be used in conjunction with that test method for deter-
and requires a large thermal gradient and steady state condi-
mining the thermal conductivity of unfired monolithic refrac-
tions. The results are based upon a mean temperature.
tories.
3.3 The data from this test method are suitable for specifi-
1.2 The values stated in inch-pound units are to be regarded
cation acceptance, estimating heat loss and surface tempera-
as standard. The values given in parentheses are mathematical
ture, and the design of multi-layer refractory construction.
conversions to SI units that are provided for information only
3.4 Theuseofthesedatarequiresconsiderationoftheactual
and are not considered standard.
application environment and conditions.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Apparatus
responsibility of the user of this standard to establish appro-
4.1 The apparatus shall be in accordance with Test Method
priate safety and health practices and determine the applica-
C201, modified as in 4.2 of this test method, with the addition
bility of regulatory limitations prior to use.
of thermocouples and refractory fiber paper, as described in
2. Referenced Documents Sections 6 and 7.
2
4.2 The furnace shall be modified by drilling a nominal
2.1 ASTM Standards:
3
⁄8-in. (10-mm) diameter hole (Fig. 1) through the insulating
C182 Test Method for Thermal Conductivity of Insulating
firebrick in the furnace wall at each end of the center line of the
Firebrick
18-in. (456-mm) dimension of the furnace cavity. These holes
C201 Test Method for Thermal Conductivity of Refracto-
shall be positioned so that the length of the hole will be parallel
ries
to the calorimeter surface and the bottom of the hole will
C862 Practice for Preparing Refractory Concrete Speci-
coincide with the surface of the calorimeter. Copper tubing
mens by Casting
shall be placed within each hole so that a compressed-air
C1054 Practice for Pressing and Drying Refractory Plastic
source can be attached to one side and flexible leads to a
and Ramming Mix Specimens
flowmeter can be attached to the other.
E220 Test Method for Calibration of Thermocouples By
4.3 A compressed-air supply and flowmeter for air.
Comparison Techniques
5. Test Specimens
3. Significance and Use
5.1 Castable Refractories—The test specimens may consist
3.1 The thermal conductivity of monolithic refractories is a
1 1
of either a panel 18 by 13 ⁄2 by 2 ⁄2 in. (456 by 342 by 64 mm),
property required for selecting their thermal transmission
1 1
or an assembly of three straights 9 by 4 ⁄2 by 2 ⁄2 in. (228 by
characteristics. Users select monolithic refractories to provide
1 1
114 by 64 mm) and six soaps 9 by 2 ⁄4 by 2 ⁄2 in. (228 by 57
specified conditions of heat loss and cold face temperature,
by 64 mm). These specimens shall be prepared as in one of the
without exceeding the temperature limitation of the monolithic
following methods and in general accordance with the manu-
facturer’s recommendation for water content and Practice
1
This test method is under the jurisdiction of ASTM Committee C08 on
C862.
Refractories and is the direct responsibility of Subcommittee C08.02 on Thermal
5.1.1 Panel Specimens—This test specimen shall be a
Properties.
1 1
monolithic panel 18 by 13 ⁄2 by 2 ⁄2 in. (456 by 342 by 64 mm)
Current edition approved Dec. 1, 2005. Published January 2006. Originally
approved in 1958. Last previous edition approved in 1998 as C417 – 93 (1998).
in size, and shall be prepared in general accordance with
DOI: 10.1520/C0417-05.
Practice C862, as outlined in 5.1. The panel shall be cast in a
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
steel mold with two steel rods (Note 1) taped in place at the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
center line of the 18-in. length of the mold cavity. These steel
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, U
...

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SCOPE
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3.1 The oxidation of silicon carbide refractories at elevated temperatures is an important consideration in the application of these refractories. The product of oxidation is amorphous silica or cristobalite, depending upon the temperature at which oxidation takes place. This oxide formation is associated with expansion and degradation of strength. The quantity of water vapor in the atmosphere greatly affects the rate of oxidation.  
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1.1 This test method covers the evaluation of the oxidation resistance of silicon carbide refractories at elevated temperatures in an atmosphere of steam. The steam is used to accelerate the test. Oxidation resistance is the ability of the silicon carbide (SiC) in the refractory to resist conversion to silicon dioxide (SiO2) and its attendant crystalline growth.  
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