ASTM C899-79(2013)

Standard Practice for Use of Metric Units of Measure for Reporting Properties of Refractory Materials

SIGNIFICANCE AND USE
3.1 This practice is provided to facilitate comparison of physical and mechanical properties of refractory materials by establishing uniform presentation of data.  
3.2 Units have been chosen, where possible, to result in numbers of magnitude familiar in the refractories industry, that is, g/cm 3 rather than the SI preferred unit kg/m3. It is recommended that SI prefixes be selected for use with the units such that the resulting numerical values lie between 0.1 and 1000. For most properties, the prefixes kilo (k) and mega (M) are preferred. Other prefixes are given in the following table:  
3.3 The conversion factors, which have been selected for their general utility in the refractories industry, have been taken from Standard E380, where possible. For uniformity, they have been presented to four decimal places. In use, the converted values should be rounded to the same number of significant figures as in the original value.
SCOPE
1.1 This practice presents the units to be employed for reporting the properties of refractories, such as density, crushing stress, modulus of rupture, tensile stress, thermal conductivity, and permeability.  
1.2 For convenience, a table of conversion factors between inch-pound units and SI units is included.

General Information

• Status: Historical
• Publication Date: 31-Aug-2013
• ICS: 01.060 - Quantities and units
• 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 C899-79(2007) - Standard Practice for Use of Metric Units of Measure for Reporting Properties of Refractory Materials (COMMITTEE C-8 SUPPLEMENT TO E 380)
• 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: C899 − 79 (Reapproved 2013)
Standard Practice for
Use of Metric Units of Measure for Reporting Properties of
Refractory Materials
(COMMITTEE C-8 SUPPLEMENT TO E 380)
This standard is issued under the fixed designation C899; 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
Multiplication
Factor Prefix Symbol
1.1 This practice presents the units to be employed for
reporting the properties of refractories, such as density, crush- 10 giga G
10 mega M
ing stress, modulus of rupture, tensile stress, thermal
10 kilo k
2 A
conductivity, and permeability.
10 hecto h
1 A
10 deka da
1.2 For convenience, a table of conversion factors between A
−1
deci
10 d
−2 A
inch-pound units and SI units is included.
10 centi c
−3
milli
10 m
−6
10 micro µ
2. Referenced Documents
−9
10 nano n
2.1 ASTM Standards:
A
E380 Practice for Use of the International System of Units To be avoided where practical.
(SI) (the Modernized Metric System) (Withdrawn 1997)
3.3 The conversion factors, which have been selected for
2.2 ISO Standard:
theirgeneral utilityintherefractoriesindustry,havebeentaken
ISO 1000 SI Units and Recommendations for the Use of
from Standard E380, where possible. For uniformity, they have
Their Multiples and of Certain Other Units
been presented to four decimal places. In use, the converted
values should be rounded to the same number of significant
3. Significance and Use
figures as in the original value.
3.1 This practice is provided to facilitate comparison of
physical and mechanical properties of refractory materials by
4. Standard Units
establishing uniform presentation of data.
4.1 Density—grams per cubic centimetre (g/cm ).
3.2 Units have been chosen, where possible, to result in
numbers of magnitude familiar in the refractories industry, that
4.2 Energy or work— joules (J) or megajoules (MJ).
3 3
is, g/cm rather than the SI preferred unit kg/m.Itis
4.3 Mass—grams (g), kilograms (kg), or megagrams (Mg).
recommended that SI prefixes be selected for use with the units
such that the resulting numerical values lie between 0.1 and
4.4 Permeabilityiscurrentlyexpressedindarcys.Onedarcy
1000. For most properties, the prefixes kilo (k) and mega (M)
is a flow of 1.00 cm /s of a fluid of 1 centipoise (cP) viscosity
are preferred. Other prefixes are given in the following table:
through a 1-cm cube of the material being measured under a
pressure differential of 1 atmosphere.Thus, a darcy is not an SI
unit. No permeability units are given in E380. Until an SI unit
1 of permeability is adopted, express permeability in darcys.
Thispracticeisunderthejurisdictiono
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