ASTM B9-90(2012)

Standard Specification for Bronze Trolley Wire

ABSTRACT
This specification covers round, grooved, and figure-9 deep-section grooved bronze trolley wire. The bronze trolley wire shall be made in any of the three distinct alloys indicated in accordance with their increasing conductivities: Alloy 40, Alloy 55 and Alloy 80. Tensile tests and tension tests shall be performed wherein the wires shall conform to the required values of tensile strength and elongation. Twist tests shall be performed wherein round wires shall conform to the required number of twists. The specimens shall also connform to the required values of electrical resistivity.
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

• Status: Historical
• Publication Date: 14-Oct-2012
• ICS: 29.280 - Electric traction equipment
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.04 - Conductors of Copper and Copper Alloys

Relations

• Replaces: ASTM B9-90(2008) - Standard Specification for Bronze Trolley Wire
• Effective Date: 15-Oct-2012
• Replaced By: ASTM B9-76(2017) - Standard Specification for Bronze Trolley Wire
• Effective Date: 01-Apr-2017
• Referred By: ASTM B258-18 - Standard Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors
• Effective Date: 15-Oct-2012
• Referred By: ASTM B193-20 - Standard Test Method for Resistivity of Electrical Conductor Materials
• Effective Date: 15-Oct-2012
• Referred By: ASTM B116-95(2017) - Standard Specification for Figure-9 Deep-Grooved and Figure-8 Copper Trolley Wire for Industrial Haulage
• Effective Date: 15-Oct-2012

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:B9 −90 (Reapproved 2012)
Standard Specification for
1
Bronze Trolley Wire
This standard is issued under the fixed designation B9; 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 (´) 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)
to either gage mark.
2. Ordering Information
5. Dimensions and Permissible Variations
2.1 Orders for material under this specification shall include
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
which may be prejudicial to the life of trolley wire, owing to its
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-
position (Explanatory Note 1) as to secure, by proper twisting machine shall be so constructed that there is a linear
motion of the tail stock with respect to the head.The twist shall
treatment, the qualities prescribed in this specification for the
finished wire. be applied not faster than 10 turns/min. All three specimens
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.
GROOVED AND FIGURE-9 WIRE
1
This specification is under the jurisdiction of ASTM Committee B01 on
7. Tensile Properties
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
Conductors of Copper and Copper Alloys.
7.1 Grooved and figure-9 wire shall conform to the appli-
Current edition approved Oct. 15, 2012. Published November 2012. Originally
cable requirements as to tensile properties prescribed in Table
approved in 1915. Last previous edition approved in 2008 as B9 – 90 (2008). DOI:
10.1520/B0009-90R12. 3.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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B9−90 (2012)
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
...