ASTM B9-90(2003)
(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.
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Designation: B 9 – 90 (Reapproved 2003)
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.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4.2 Tests on a specimen of round wire containing a joint
shall show at least 95 % of the tensile strength specified in
1.1 This specification covers round, grooved, and figure-9
Table 1. Elongation tests shall not be made on specimens
deep-section grooved bronze trolley wire.
containing joints.
1.2 The bronze trolley wire may be made in any of the three
4.3 Tension tests shall be made on representative samples.
distinct alloys indicated in accordance with their increasing
The elongation shall be determined as the permanent increase
conductivities: Alloy 40, Alloy 55, Alloy 80.
in length, due to the breaking of the wire in tension, measured
1.3 The values stated in inch-pound units are to be regarded
between gage marks placed originally 10 in. (254 mm) apart
as the standard. The metric equivalents of inch-pound units
uponthetestspecimen(ExplanatoryNote2).Thefractureshall
given in this standard may be approximate.
be between the gage marks and not closer than 1 in. (25.4 mm)
2. Ordering Information
to either gage mark.
2.1 Orders for material under this specification shall include
5. Dimensions and Permissible Variations
the following information:
5.1 The size of round trolley wire shall be expressed as the
2.1.1 Quantity of each size, section, and class,
diameter of the wire in decimal fractions of an inch to the
2.1.2 Wire size: diameter in in. (see 5.1 and Table 1) or area
nearest 0.1 mil (0.0001 in.) (0.0025 mm).
in circular mils (see 8.1 and Fig. 1 and Fig. 2),
5.2 Wire shall be truly cylindrical in form. The diameter
2.1.3 Shape of section (see 1.1),
shall not vary more than 61 % from that specified.
2.1.4 Alloy (see 1.2),
2.1.5 Package size (see 17.3),
6. Twist Test
2.1.6 Lagging, if required (see 17.1),
6.1 For the purpose of determining and developing defects
2.1.7 Relation between vertical axis of grooved wire and
whichmaybeprejudicialtothelifeoftrolleywire,owingtoits
axis of reel (see 17.1),
peculiar service as compared to that of wire for other purposes,
2.1.8 Size of arbor hole if other than 4-in. (102 mm) square
round wire shall be subjected to the twist test described in 6.2.
(see 17.2),
Round wire shall not be considered satisfactory if it does not
2.1.9 Special package marking, if required (see 17.4), and
withstand, without breaking, at least the number of twists
2.1.10 Place of inspection (Section 15).
prescribed in Table 2.
3. Material 6.2 Three twist tests shall be made on specimens 10 in. (254
mm) in length between the holders of the testing machine. The
3.1 The material shall be bronze of such nature and com-
twisting machine shall be so constructed that there is a linear
position (Explanatory Note 1) as to secure, by proper treat-
motion of the tail stock with respect to the head.The twist shall
ment, the qualities prescribed in this specification for the
be applied not faster than 10 turns/min. All three specimens
finished wire.
shall be twisted to destruction and shall not reveal under test
ROUND WIRE
any seams, pits, slivers, or surface imperfections of sufficient
magnitude to indicate inherent defects or imperfections in the
4. Tensile Properties
wire. At the time of fracture the wire shall twist with reason-
4.1 Round wire shall conform to the requirements as to
able uniformity.
tensile properties prescribed in Table 1.
GROOVEDAND FIGURE-9 WIRE
7. Tensile Properties
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
7.1 Grooved and figure-9 wire shall conform to the appli-
Conductors of Copper and Copper Alloys.
cable requirements as to tensile properties prescribed in Table
Current edition approved October 1, 2003. Published October 2003. Originally
e2
3.
approved in 1915. Last previous edition approved in 1998 asB9–90 (1998) .
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B 9 – 90 (2003)
TABLE 1 Tensile Requirements for Round Trolley Wire
Diameter Area Tensile Strength, min Elongation
in 10 in.
Alloys 40 and 55 Alloy 80
2 (254 mm),
in. mm cmil mm
psi MPa psi MPa min, %
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
7.2 Tests on a specimen of grooved or figure-9 wire con- ROUND, GROOVED,AND FIGURE-9 WIRE
taining a joint shall show at least 95 % of the tensile strength
specified in Table 3. Elongation tests shall not be made on
11. Resistivity
specimens containing joints.
11.1 Electrical resistivity shall be determined on represen-
7.3 The tension and elongation tests for grooved or figure-9
tative samples by resistance measurements (Explanatory Note
wire shall be made in the same manner as those on round wire
3).At a temperature of 20°C the resistivity shall not exceed the
as described in 4.3.
values prescribed in Table 4.
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
nominal area of cross section in circular mils.
12. Density
8.2 The standard sizes of grooved trolley wire shall be as
12.1 For the purpose of calculating mass, cross-sections,
specified in Fig. 1.
and so forth, the density of the bronze (Explanatory Note 4)
8.3 Thestandardsizeoffigure-9wireshallbeasspecifiedin
3 3
shall be taken as 8.89 g/cm (0.32117 lb/in. ) at 20°C (Explana-
Fig. 2.
tory Note 5).
8.4 The weight in pounds per mile of grooved and figure-9
trolley wire calculated from the weight of a specimen not less
13. Joints
than 18 in. (460 mm) in length shall not vary more than 64%
from that specified in Fig. 1 for grooved wire, and Fig. 2 for 13.1 Nojointsshallbemadeinthecompletedwire.Jointsin
figure-9 wire.
the wire and rods made prior to final drawings shall be in
8.5 Conformance of the trolley wire to the specified dimen- accordance with the best commercial practice, and shall be
sionsshallbedeterminedbytakingthemeasurementsshownin
capable of meeting the tensile strength requirements in 4.2 or
Fig. 1 and Fig. 2 under the heading, “Dimensions for Inspec- 7.2.
tion, in.” The shape of the groove shall be checked with the
appropriate “go” and “no-go” slip gages described in Fig. 3.
14. Workmanship, Finish, andAppearance
The gages shall be applied to the ends of the samples taken
14.1 The wire shall be of uniform size, shape, and quality
from each reel. Samples shall be clean and the ends free from
throughout, and shall be free from all scale, flaws, splits, and
burrs. The groove shall be considered as conforming to this
scratches not consistent with the best commercial practice.
specificationifthe“go”gagecanbepushedonthestraightened
wire by hand and the “no-go” gage cannot be pushed on the
15. Inspection
wire.
15.1 All tests governing the acceptance or rejection of the
9. Sections wire, unless otherwise specified, shall be made at the place of
manufacture with apparatus furnished by the manufacturer and
9.1 Standard sections of grooved trolley wire shall be
inthepresenceofthepurchaserorhisrepresentative,whoshall
known as the “American Standard Grooved Trolley Wire
be furnished a copy of the tests. The manufacturer shall afford
Sections” (the Standard Design of the American Transit Engi-
theinspectorrepresentingthepurchaserallreasonablefacilities
neering Association) shown in Fig. 1.
to satisfy him as to the reliability of the results before the wire
9.2 The standard section of figure-9 wire shall be as shown
is delivered. If the purchaser waives inspection, and if he so
in Fig. 2.
elects at that time, he shall be furnished with a certified copy of
tests made by the manufacturer.
10. Twist Test
10.1 For the purpose of determining and developing defects
16. Rejection
that may be prejudicial to the life of trolley wire, owing to its
peculiar service as compared to that of wire for other purposes, 16.1 Any reel of wire that fails to conform to the require-
grooved wire shall be subjected to the twist test described in ments prescribed in this specification may be rejected. Failure
6.2. Grooved wire that does not withstand at least three twists of 30 % of the number of reels ready for inspection at one time
without breaking shall not be considered satisfactory.The twist shall be deemed sufficient cause for the rejection of the whole
test shall be omitted for figure-9 wire. lot.
B 9 – 90 (2003)
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 0.392 6 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 Referen
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