ASTM B2-00(2005)e1
(Specification)Standard Specification for Medium-Hard-Drawn Copper Wire
Standard Specification for Medium-Hard-Drawn Copper Wire
SCOPE
1.1 This specification covers medium-hard-drawn round copper wire for electrical purposes (see Explanatory Note 0).
1.2 The SI values of density and resistivity are to be regarded as standard. For all other properties the inch-pound values are to be regarded as standard, and the SI units may be approximate.
1.3 This standard does not purport to address all of the safety concerns, 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.
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e1
Designation: B 2 – 00 (Reapproved 2005)
Standard Specification for
Medium-Hard-Drawn Copper Wire
This standard is issued under the fixed designation B 2; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Reference to military approval (DoD) was removed in March 2005.
1. Scope NBS Handbook 100 Copper Wire Tables of the National
Bureau of Standards
1.1 This specification covers medium-hard-drawn round
copper wire for electrical purposes (see Explanatory Note 1).
3. Ordering Information
1.2 The SI values of density and resistivity are to be
3.1 Orders for material under this specification should
regarded as standard. For all other properties the inch-pound
include the following information:
values are to be regarded as standard, and the SI units may be
3.1.1 Quantity of each size;
approximate.
3.1.2 Wire size: diameter in inches (see 5.1 and Table 1);
1.3 This standard does not purport to address all of the
3.1.3 Type of copper, if special (see Section 4);
safety concerns, if any, associated with its use. It is the
3.1.4 Package size (see 10.1);
responsibility of the user of this standard to establish appro-
3.1.5 Special package marking, if required; and
priate safety and health practices and determine the applica-
3.1.6 Place of inspection (Section 10).
bility of regulatory limitations prior to use.
4. Materials and Manufacture
2. Referenced Documents
4.1 The material shall be copper of such quality and purity
2.1 The following documents of the issue in effect on date
that the finished product shall have the properties and charac-
of material purchase form a part of this specification to the
teristics prescribed in this specification.
extent referenced herein:
2.2 ASTM Standards:
NOTE 1—Specifications B 5, B 49, and B 170 define the materials
B5 Specification for High-Conductivity Tough-Pitch Cop- suitable for use.
per Refinery Shapes
4.2 Copper bars of special qualities, forms, or types, as may
B49 Specification for Copper Rod Drawing Stock for
be agreed upon between the manufacturer and the purchaser,
Electrical Purposes
and which will conform to the requirements prescribed in this
B 170 Specification for Oxygen-Free Electrolytic Copper—
specification, may also be used.
Refinery Shapes
B 193 Test Method for Resistivity of Electrical Conductor 5. Dimensions and Permissible Variations
Materials
5.1 The wire sizes shall be expressed as the diameter of the
B 258 Specification for Standard Nominal Diameters and
wire in decimal fractions of an inch to the nearest 0.0001 in.
Cross-SectionalAreasofAWGSizesofSolidRoundWires
(0.1 mil) or in millimetres to the nearest 0.001 mm (Explana-
Used as Electrical Conductors
tory Note 2).
2.3 Other Documents:
5.2 Within the range of diameters included in Table 1 the
wire shall not vary from the specified diameter by more than
61 %, expressed to the nearest 0.0001 in. (0.1 mil) 0.001 mm.
This specification is under the jurisdiction of ASTM Committee B01 on
5.3 Ten percent, but not less than five coils or spools (or all
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
if the lot is less than five) from any lot of wire shall be gaged
Conductors of Copper and Copper Alloys.
at three places. If accessible, one gaging shall be taken near
Current edition approved Mar. 1, 2005. Published March 2005. Originally
approved in 1912. Last previous edition approved in 2000 asB2–00. each end and one near the middle. If any of the selected coils
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on Available from National Technical Information Service (NTIS), U.S. Depart-
the ASTM website. ment of Commerce, 5285 Port Royal Rd., Springfield, VA 22161.
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B 2 – 00 (2005)
TABLE 1 Tensile Requirements
Diameter Area at 20°C Tensile Strength Elongation, min,
%in 10-in.
2 2
in. mm cmil in. mm psi MPa
(250 mm)
Min Max Min Max
0.4600 11.684 211 600 0.1662 107.0 42 000 49 000 290 340 3.8
0.4096 10.404 167 800 0.1318 85.0 43 000 50 000 295 345 3.6
0.3648 9.266 133 100 0.1045 67.4 44 000 51 000 305 350 3.2
0.3249 8.252 105 600 0.08291 53.5 45 000 52 000 310 360 3.0
0.2893 7.348 83 690 0.06573 42.4 46 000 53 000 315 365 2.8
0.2576 6.543 66 360 0.05212 33.6 47 000 54 000 325 370 2.5
0.2294 5.827 52 620 0.04133 26.7 48 000 55 000 330 380 2.2
0.2043 5.189 41 740 0.03278 21.2 48 330 55 330 335 380 1.9
0.1819 4.620 33 090 0.02599 16.8 48 660 55 660 335 385 1.7
0.1620 4.115 26 240 0.02061 13.3 49 000 56 000 340 385 1.5
0.1443 3.665 20 820 0.01635 10.5 49 330 56 330 340 390 1.4
0.1285 3.264 16 510 0.01297 8.37 49 660 56 660 340 390 1.3
0.1144 2.906 13 090 0.01028 6.63 50 000 57 000 345 395 1.3
0.1019 2.588 10 380 0.008155 5.26 50 330 57 330 345 395 1.2
0.0907 2.304 8 230 0.00646 4.17 50 660 57 600 350 400 1.2
0.0808 2.052 6 530 0.00513 3.31 51 000 58 000 350 400 1.1
0.0720 1.829 5 180 0.00407 2.63 51 330 58 330 355 400 1.1
0.0641 1.628 4 110 0.00323 2.08 51 660 58 660 355 405 1.0
0.0571 1.450 3 260 0.00256 1.65 52 000 59 000 360 405 1.0
0.0508 1.290 2 580 0.00203 1.31 52 330 59 330 360 410 1.0
0.0453 1.151 2 050 0.00161 1.04 52 660 59 660 365 410 1.0
0.0403 1.024 1 620 0.00128 0.823 53 000 60 000 365 415 1.0
orspoolsfailstoconformtotherequirementsprescribedin5.2, 8. Resistivity
all coils or spools shall be gaged in the manner specified.
8.1 Electrical resistivity shall be determined on representa-
tive samples by resistance measurements (Explanatory Note 5
6. Workmanship, Finish, andAppearance
and Note 6). At a temperature of 20°C the resistivity shall not
exceed the following values:
6.1 The wire shall be free from all imperfections not
Nominal Diameter, in. Resistivity at 20°C,
consistent with the best commercial practice.
2 2
V·lb/mile V·g/m
0.460 to 0.325 (11.684 to 8.255 mm), incl 896.15 0.15695
7. Tensile Properties
Under 0.325 to 0.0403 (8.255 to 1.024 mm), incl 905.44 0.15858
7.1 The wire shall conform to the requirements as to tensile 8.2 Tests to determine conformance to the electrical resis-
properties prescribed in Table 1 (Explanatory Note 2 and Note tance requirements shall be made in accordance with Test
3). Method B 193.
7.2 Tests on a specimen containing a joint shall show at
9. Joints
least 95 % of the minimum tensile strength given in Table 1.
9.1 No joints shall be made in the completed wire (Explana-
Elongation tests shall not be made on a specimen containing a
tory Note 7). Joints in wire and rods, prior to final drawing,
joint.
shall be made in accordance with the best commercial practice
7.3 For wire the nominal diameter of which is more than
and shall conform to the requirements prescribed in 7.2.
0.001 in. (1 mil) (0.025 mm) greater than a size listed in Table
1, but which is less than that of the next larger size, the
10. Inspection
requirements of the next larger size shall apply.
10.1 Unless otherwise specified in the contract or purchase
7.4 Determine the elongation of the wire as the permanent
order, the manufacturer shall be responsible for the perfor-
increase in length due to the breaking of the wire in tension,
mance of all inspection and test requirements specified (Ex-
measured between gage marks placed originally 10 in. (254
planatory Note 8).
mm) apart upon the test specimen (Explanatory Note 4).
10.2 All inspections and tests shall be made at the place of
7.5 If any part of the fracture takes place outside the gage
manufacture unless otherwise especially agreed to between the
marks or in the jaws of the testing machine, or if an examina-
manufacturer and the purchaser at the time of the purchase.
tion of the specimen indicates a flaw, the value obtained may
10.3 The manufacturer shall afford the inspector represent-
not be representative of the material. In such cases the test may
ing the purchaser all reasonable manufacturer’s facilities to
be discarded and a new test made.
satisfy that the material is being furnished in accordance with
7.6 Retests—If, upon testing a sample from any coil or this specification.
spool of wire, the results do not conform to the requirements 10.4 Unless otherwise agreed upon between the purchaser
prescribed in Table
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