ASTM B9-90(1998)e2
(Specification)Standard Specification for Bronze Trolley Wire
Standard Specification for Bronze Trolley Wire
SCOPE
1.1 This specification covers round, grooved, and figure-9 deep-section grooved bronze trolley wire.
1.2 The bronze trolley wire may be made in any of the three distinct alloys indicated in accordance with their increasing conductivities: Alloy 40, Alloy 55, Alloy 80.
1.3 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units given in this standard may be approximate.
General Information
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Standards Content (Sample)
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e2
Designation: B 9 – 90 (Reapproved 1998)
Standard Specification for
Bronze Trolley Wire
This standard is issued under the fixed designation B 9; 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.
e NOTE—Table 4 was updated and Section 18 was added editorially in June 1998.
e NOTE—Figure 1 was updated editorially in August 2002.
1. Scope tensile properties prescribed in Table 1.
4.2 Tests on a specimen of round wire containing a joint
1.1 This specification covers round, grooved, and figure-9
shall show at least 95 % of the tensile strength specified in
deep-section grooved bronze trolley wire.
Table 1. Elongation tests shall not be made on specimens
1.2 The bronze trolley wire may be made in any of the three
containing joints.
distinct alloys indicated in accordance with their increasing
4.3 Tension tests shall be made on representative samples.
conductivities: Alloy 40, Alloy 55, Alloy 80.
The elongation shall be determined as the permanent increase
1.3 The values stated in inch-pound units are to be regarded
in length, due to the breaking of the wire in tension, measured
as the standard. The metric equivalents of inch-pound units
between gage marks placed originally 10 in. (254 mm) apart
given in this standard may be approximate.
upon the test specimen (Explanatory Note 2). The fracture shall
2. Ordering Information
be between the gage marks and not closer than 1 in. (25.4 mm)
to either gage mark.
2.1 Orders for material under this specification shall include
the following information:
5. Dimensions and Permissible Variations
2.1.1 Quantity of each size, section, and class,
5.1 The size of round trolley wire shall be expressed as the
2.1.2 Wire size: diameter in in. (see 5.1 and Table 1) or area
diameter of the wire in decimal fractions of an inch to the
in circular mils (see 8.1 and Fig. 1 and Fig. 2),
nearest 0.1 mil (0.0001 in.) (0.0025 mm).
2.1.3 Shape of section (see 1.1),
5.2 Wire shall be truly cylindrical in form. The diameter
2.1.4 Alloy (see 1.2),
shall not vary more than 6 1 % from that specified.
2.1.5 Package size (see 17.3),
2.1.6 Lagging, if required (see 17.1),
6. Twist Test
2.1.7 Relation between vertical axis of grooved wire and
6.1 For the purpose of determining and developing defects
axis of reel (see 17.1),
which may be prejudicial to the life of trolley wire, owing to its
2.1.8 Size of arbor hole if other than 4-in. (102 mm) square
peculiar service as compared to that of wire for other purposes,
(see 17.2),
round wire shall be subjected to the twist test described in 6.2.
2.1.9 Special package marking, if required (see 17.4), and
Round wire shall not be considered satisfactory which does not
2.1.10 Place of inspection (Section 15).
withstand, without breaking, at least the number of twists
3. Material prescribed in Table 2.
6.2 Three twist tests shall be made on specimens 10 in. (254
3.1 The material shall be bronze of such nature and com-
mm) in length between the holders of the testing machine. The
position (Explanatory Note 1) as to secure, by proper treat-
twisting machine shall be so constructed that there is a linear
ment, the qualities prescribed in this specification for the
motion of the tail stock with respect to the head. The twist shall
finished wire.
be applied not faster than 10 turns/min. All three specimens
ROUND WIRE
shall be twisted to destruction and shall not reveal under test
any seams, pits, slivers, or surface imperfections of sufficient
4. Tensile Properties
magnitude to indicate inherent defects or imperfections in the
4.1 Round wire shall conform to the requirements as to
wire. At the time of fracture the wire shall twist with reason-
able uniformity.
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
Conductors of Copper and Copper Alloys.
Current edition approved Aug. 3, 1990. Published October 1990. Originally
published as B9–15T. Last previous edition B9–76 (1990).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
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e2
B 9 – 90 (1998)
TABLE 1 Tensile Requirements for Round Trolley Wire
Diameter Area Tensile Strength, min
Elongation
in 10 in.
Alloys 40 and 55 Alloy 80
(254 mm),
in. mm cmil mm
min, %
psi MPa psi MPa
0.5477 13.911 300 000 152.0 64 800 447 61 500 424 4.50
0.4600 11.648 211 600 107.0 69 000 476 65 000 448 3.75
0.4096 10.404 167 800 85.0 71 000 490 67 000 462 3.25
0.3648 9.266 133 100 67.4 73 000 503 69 000 476 2.75
0.3249 8.252 105 600 53.5 76 000 524 72 000 496 2.40
GROOVED AND FIGURE-9 WIRE peculiar service as compared to that of wire for other purposes,
grooved wire shall be subjected to the twist test described in
7. Tensile Properties
6.2. Grooved wire that does not withstand at least three twists
7.1 Grooved and figure-9 wire shall conform to the appli-
without breaking shall not be considered satisfactory. The twist
cable requirements as to tensile properties prescribed in Table
test shall be omitted for figure-9 wire.
3.
ROUND, GROOVED, AND FIGURE-9 WIRE
7.2 Tests on a specimen of grooved or figure-9 wire con-
taining a joint shall show at least 95 % of the tensile strength
11. Resistivity
specified in Table 3. Elongation tests shall not be made on
11.1 Electrical resistivity shall be determined on represen-
specimens containing joints.
tative samples by resistance measurements (Explanatory Note
7.3 The tension and elongation tests for grooved or figure-9
3). At a temperature of 20°C the resistivity shall not exceed the
wire shall be made in the same manner as those on round wire
values prescribed in Table 4.
as described in 4.3.
11.2 Lower resistivities in wires conforming to the physical
8. Dimensions and Permissible Variations
qualifications may be obtained by the use of special alloys.
8.1 The size of the trolley wire shall be expressed as the
12. Density
nominal area of cross section in circular mils.
12.1 For the purpose of calculating mass, cross-sections,
8.2 The standard sizes of grooved trolley wire shall be as
etc., the density of the bronze (Explanatory Note 4) shall be
specified in Fig. 1.
3 3
taken as 8.89 g/cm (0.32117 lb/in. ) at 20°C (Explanatory Note
8.3 The standard size of figure-9 wire shall be as specified in
5).
Fig. 2.
8.4 The weight in pounds per mile of grooved and figure-9
13. Joints
trolley wire calculated from the weight of a specimen not less
13.1 No joints shall be made in the completed wire. Joints in
than 18 in. (460 mm) in length shall not vary more than 6 4%
the wire and rods made prior to final drawings shall be in
from that specified in Fig. 1 for grooved wire, and Fig. 2 for
accordance with the best commercial practice, and shall be
figure-9 wire.
capable of meeting the tensile strength requirements in 4.2 or
8.5 Conformance of the trolley wire to the specified dimen-
7.2.
sions shall be determined by taking the measurements shown in
Fig. 1 and Fig. 2 under the heading, “Dimensions for Inspec-
14. Workmanship, Finish, and Appearance
tion, in.” The shape of the groove shall be checked with the
14.1 The wire shall be of uniform size, shape, and quality
appropriate “go” and “no-go” slip gages described in Fig. 3.
throughout, and shall be free from all scale, flaws, splits, and
The gages shall be applied to the ends of the samples taken
scratches not consistent with the best commercial practice.
from each reel. Samples shall be clean and the ends free from
burrs. The groove shall be considered as conforming to this
15. Inspection
specification if the “go” gage can be pushed on the straightened
15.1 All tests governing the acceptance or rejection of the
wire by hand and the “no-go” gage cannot be pushed on the
wire, unless otherwise specified, shall be made at the place of
wire.
manufacture with apparatus furnished by the manufacturer and
9. Sections
in the presence of the purchaser or his representative, who shall
be furnished a copy of the tests. The manufacturer shall afford
9.1 Standard sections of grooved trolley wire shall be
the inspector representing the purchaser all reasonable facilities
known as the “American Standard Grooved Trolley Wire
Sections” (the Standard Design of the American Transit Engi- to satisfy him as to the reliability of the results before the wire
is delivered. If the purchaser waives inspection, and if he so
neering Association) shown in Fig. 1.
elects at that time, he shall be furnished with a certified copy of
9.2 The standard section of figure-9 wire shall be as shown
tests made by the manufacturer.
in Fig. 2.
10. Twist Test 16. Rejection
10.1 For the purpose of determining and developing defects 16.1 Any reel of wire that fails to conform to the require-
that may be prejudicial to the life of trolley wire, owing to its ments prescribed in this specification may be rejected. Failure
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
e2
B 9 – 90 (1998)
Nominal Size:
cmil 133 100 167 800 211 600 300 000 350 000
(mm ) (67.4) (85.0) (107.00) (152.0) (177.3)
Area (Explanatory Note 6):
cmil 137 900 167 300 212 000 299 800 351 200
in 0.1083 0.1314 0.1665 0.2355 0.2258
(mm ) (69.9) (84.7) (107.4) (151.9) (177.9)
Weight (Explanatory Note 6):
lb/mile 2205 2674 3389 4792 5612
(kg/km) (621) (756) (955) (1350) (1581)
Dimensions for Inspection, in.
10.006 10.006 10.006 10.010 10.010
A 0.388 0.429 0.482 0.574 0.620
20.012 20.012 20.012 20.020 20.020
B 0.3926 0.007 0.430 6 0.008 0.482 6 0.009 0.574 6 0.011 0.6206 0.012
A †
C 0.318 6 0.007 0.340 6 0.007 0.376 6 0.007 0.376 6 0.007 0.376 6 0.007
Dimensions for Inspection, mm
10.1524 10.1524 10.1524 10.254 10.254
A 9.86 10.6 12.2 14.6 15.7
20.3048 20.3048 20.3048 20.508 20.508
B 9.96 6 0.1778 10.9 6 0.2032 12.2 6 0.2286 14.6 6 0.2794 15.7 6 0.3048
C 8.08 6 0.1778 8.64 6 0.1778 9.55 6 0.1778 9.55 6 0.1778 9.55 6 0.1778
Dimensions for Reference, in.
D—radius 0.196 0.215 0.241 0.287 0.310
10.005 10.005
E 0.217 0.237 0.2676 0.010 0.267 6 0.010 0.267 6 0.010
20.010 20.010
F 0.200 0.220 0.250 0.250 0.250
G 0.031 0.047 0.063 0.127 0.156
H 0.005 0.005 0.005 0.005 0.005
J27 6 2° 27 6 2° 27 6 2° 27
...
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