ASTM B227-98

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
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Designation: B 227 – 98
Standard Specification for
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Hard-Drawn Copper-Clad Steel Wire
This standard is issued under the fixed designation B 227; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.1.3 Grade (see 1.2 and Table 1),
3.1.4 Method of measuring elongation (see 7.3 and 7.4),
1.1 This specification covers bare hard-drawn round copper-
3.1.5 Package size (see 14.1),
clad steel wire for electrical purposes (Note 1).
3.1.6 Special package marking, if required (Section 13), and
NOTE 1—Wire ordered to this specification is not intended for redraw-
3.1.7 Place of inspection (Section 15).
ing. If wire is desired for this purpose, consult the manufacturer.
4. Material
1.2 Four grades of wire are specified, designated as follows
(Note 2): Grade 40 HS, Grade 40 EHS, Grade 30 HS, and
4.1 The wire shall be composed of a steel core with a
Grade 30 EHS.
substantially uniform and continuous copper cladding thor-
oughly bonded to it throughout.
NOTE 2—The grades covered by this specification correspond to the
4.2 The finished copper-clad steel wire shall conform to the
following commercial designations:
requirements prescribed in this specification.
Grade 40 HS, High Strength, 40 % Conductivity.
Grade 40 EHS, Extra High Strength, 40 % Conductivity
5. Dimensions and Permissible Variations
Grade 30 HS, High Strength, 30 % Conductivity.
Grade 30 EHS, Extra High Strength, 30 % Conductivity.
5.1 The size shall be expressed as the diameter of the wire
1.3 The values stated in inch-pound units are to be regarded in decimal fractions of an inch; using four places of decimals,
that is, in tenths of mils (Note 3).
as the standard. The values given in parentheses are in SI units.
NOTE 3—The values of wire diameters in Table 1 are given to the
2. Referenced Documents
nearest 0.0001 in. and correspond to the standard sizes given in Specifi-
2.1 The following documents of the issue in effect on date
cation B 258. In specifying diameters of wire or in inspecting wire,
of material purchase form a part of this specification to the
express the diameter to the fourth decimal place. The diameters preceded
by asterisks are not in the American Wire Gage series and are also given
extent referenced herein.
to four places of decimals. They correspond to certain of the numbers of
2.2 ASTM Standards:
the Birmingham Wire Gage of the British Standard Wire Gage and are
B 193 Test Method for Resistivity of Electrical Conductor
used for communication lines. The use of gage numbers in specifying wire
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Materials
sizes is not recognized in these specifications because of the possibility of
B 258 Specification for Standard Nominal Diameters and
confusion. An excellent discussion of wire gages and related subjects is
Cross-Sectional Areas of AWG Sizes of Solid Round Wires
contained in NBS Handbook 100 of the National Institute of Standards and
2 3
Used as Electrical Conductors Technology.
2.3 National Institute of Standards and Technology:
5.2 Within the range of diameters included in Table 1 the
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NBS Handbook 100—Copper Wire Tables
wire shall not vary from the specified diameter by more than
the following amounts rounded off to the nearest 0.1 mil
3. Ordering Information
(0.0001 in.):
3.1 Orders for material under this specification shall include
Specified Diameter, Permissible Variations in Specified
the following information:
in. (mm) Diameter
3.1.1 Quantity of each size and grade,
0.2043 (5.189) to 0.1000 (2.540), incl 61.5 %
3.1.2 Wire size: diameter in inches (see 5.1 and Table 1),
0.0999 (2.537) to 0.0800 (2.032), incl 60.0015 in. (1.5 mils) (0.038 mm)
0.799 (2.029) to 0.0600 (1.524), incl + 0.0010 in. (1.0 mils) (0.025 mm)
−0.0015 in. (1.5 mils) (0.038 mm)
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This specification is under the jurisdiction of the ASTM Committee B-1 on
0.0599 (1.521) and under 60.0010 in. (1.0 mils) (0.025 mm)
Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on
Composite Conductors.
5.3 Ten percent, but not less than five coils or spools (or all
Current edition approved March 10, 1998. Published September 1998. Originally
if the lot is less than five) from any lot of wire shall be gaged
e1
published as B 227 – 48 T. Last pbevious edition B 227 – 88 (1993) .
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at three places. If accessible, one gaging shall be taken near
Annual Book of ASTM Standards, Vol 02.03.
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Available from National Institute of Standards and Technology, (NIST), each end and one near the middle. If any of the selected coils
Gaithersburg, MD 20899.
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