21% IACS 0.81mm Copper Clad Steel Wire Electrical Conductor for CATV Drop Wire ASTM B869
1. Scope
1.1 This specification covers 21 % conductivity hard-drawn
round copper-clad steel wire for coaxial cable center conductors
(Note 1).
NOTE 1—Wire ordered to this specification is not intended for redrawing
since it is furnished in the hard-drawn temper. If wire is desired for the
purpose, the manufacturer should be consulted.
1.2 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are for
information only.
2. Referenced Documents
2.1 The following documents, of the issue in effect on the
date of material purchase, form a part of this specification to
the extent referenced herein.
2.2 ASTM Standards: 2
B 193 Test Method for Resistivity of Electrical Conductor
Materials
B 258 Specification for Standard Nominal Diameters and
Cross-Sectional Areas ofAWG Sizes of Solid RoundWires
Used as Electrical Conductors
2.3 NIST Document:
NBS Handbook 100—Copper Wire Tables3
3. Ordering Information
3.1 Orders for material under this specification shall include
the following information:
3.1.1 Quantity of each size;
3.1.2 Wire size: diameter in inches (see 5.1 and Table 1);
3.1.3 Package size (see 15.1);
3.1.4 Special package marking, if required (Section 15); and
3.1.5 Place of inspection (13.2).
4. Material
4.1 The wire shall be composed of a steel core with a
substantially uniform and continuous copper cladding thoroughly
bonded to it throughout.
4.2 The finished copper-clad steel wire shall conform to the
requirements in this specification.
5. Dimensions and Permissible Variations
5.1 The size shall be expressed as the diameter of the wire
in decimal fractions of an inch, using four places of decimals,
that is, in tenths of a mil (Note 2).
NOTE 2—The values of wire diameters in Table 1 and Table 2 are given
to the nearest 0.0001 in. (0.0025 mm) and correspond to the standard sizes
given in Specification B 258. In specifying diameters of wire or inspecting
wire, the diameter should also be expressed to the fourth decimal place.
An excellent discussion of wire gages and related subjects is contained in
NBS Handbook 100.
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. (0.0025 mm).
5.3 Ten percent, but not less than five reels (or all, if the lot
is less than five), from any lot of wire shall be gaged. All reels
shall be gaged if any of the selected reels fail to conform to the
requirements for diameter
6. Workmanship, Finish, and Appearance
6.1 The surface of the wire shall be free from imperfections
and be consistent with good commercial practice.
7. Tensile and Elongation Properties
7.1 The wire shall conform to a minimum tensile requirement
of 120 000 psi (827 MPa) and a minimum elongation
requirement of 1.0 %.
7.2 Tension tests shall be made on representative samples.
Unless otherwise agreed upon between the manufacturer and
the purchaser, the elongation shall be determined by measurements
made between the jaws of the testing machine. The zero
length shall be the distance between the jaws when a load equal
to 10 % of the specified tensile strength has been applied, and
the final length shall be the distance between the jaws at the
time of rupture. The zero length shall be as near 10 in. (254
mm) as practicable. The fracture shall be between the jaws of
the testing machine and not closer than 1 in. (25.4 mm) to
either jaw. The elongation as thus determined shall not be less
than 1.0 %. See Table 2 for related breaking strengths.
7.3 When agreed upon between the manufacturer and the
purchaser, the elongation may be measured by means of an
extensometer suitable for measuring elongation in 10 in. (250
mm) and having a vernier reading to 0.01 in. (0.25 mm)
attached to the test specimen at a tension load of approximately
10 % of rated strength. The elongation as thus determined shall
not be less than 1.0 %. If the fracture occurs before the 1.0 %
elongation requirement and outside the two attachments of the
extensometer to the specimen, this sample shall be disregarded
and a retest shall be performed.
7.4 Retest—If, upon testing a sample from any coil or spool
of wire, the results do not conform to the tensile requirements
prescribed in 7.1 and the elongation requirements of 7.4, two
additional samp