ASTM C861-93(2005)

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Designation:C861–93 (Reapproved 2005)
Standard Practice for
Determining Metric Dimensions of Standard Series
Refractory Brick and Shapes
This standard is issued under the fixed designation C861; 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 aim of preserving a modular relationship between the dimen-
sions of the principal rectangular refractory shapes.
1.1 This practice covers dimensions in millimetres for
standard series refractory brick and shapes of all compositions.
4. Standard Dimensions
1.2 A standard method for converting all other dimensions
4.1 Table 1 lists the standard nominal dimensions in milli-
of shaped refractory articles from inch-pound to SI units is
metres, with corresponding standard dimensions in inch-pound
included.
units shown for reference only. Note that these dimensions are
1.3 The values stated in SI units are to be regarded as
not exact conversions, but in all but two cases are within ⁄4 %
standard. The values given in parentheses are for information
of the exact value.
only.
5. Conversion
2. Referenced Documents
2 5.1 For dimensions not listed in Table 1, multiply the
2.1 ASTM Standards:
dimension in inches by the factor 25.4 to obtain the exact
IEEE/ASTM SI 10 American National Standard for Use of
conversion in millimetres. For description or specification of
the International System of Units (SI): The Modern Metric
refractory shapes, round the dimension to the nearest whole
System
millimetre. For example:
3. Significance and Use 1 in. 3 25.4 = 25.4 mm, expressed as 25 mm
11 in. 3 25.4 = 279.4 mm, expressed as 279 mm
3.1 Thispracticeisprovidedintheinterestoffacilitatingthe
22 ⁄2 in. 3 25.4 = 571.5 mm, expressed as 572 mm
transition of dimensional practice for standard refractory brick
and shapes from inch-pound units to metric (SI) units.
6. Standard Equivalent
3.2 The standard dimensions are based on a 38-mm module
6.1 For closest approximation to inch-pound units, the
(taken as the equivalent to 1.5 in.) and are developed with the
metric (SI) Standard Equivalent is based upon the 228 by 114
by 64-mm straight. One Standard Equivalent thus contains
3 3
This practice is under the jurisdiction of ASTM Committee C08 on Refracto-
1.6635 dm (101.51 in. ).
ries, and i
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