1、Designation: B9 76 (Reapproved 2017)Standard Specification forBronze Trolley Wire1This standard is issued under the fixed designation B9; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last revision. A number in parent
2、heses indicates the year of last reapproval. A superscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers round, grooved, and figure-9deep-section grooved bronze trolley wire.1.2 The bronze trolley wire may be made in any of the th
3、reedistinct alloys indicated in accordance with their increasingconductivities: Alloy 40, Alloy 55, Alloy 80.1.3 The values stated in inch-pound units are to be regardedas the standard. The metric equivalents of inch-pound unitsgiven in this standard may be approximate.1.4 This international standar
4、d was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Orde
5、ring Information2.1 Orders for material under this specification shall includethe following information:2.1.1 Quantity of each size, section, and class,2.1.2 Wire size: diameter in in. (see 5.1 and Table 1) or areain circular mils (see 8.1 and Fig. 1 and Fig. 2),2.1.3 Shape of section (see 1.1),2.1.
6、4 Alloy (see 1.2),2.1.5 Package size (see 17.3),2.1.6 Lagging, if required (see 17.1),2.1.7 Relation between vertical axis of grooved wire andaxis of reel (see 17.1),2.1.8 Size of arbor hole if other than 4-in. (102 mm) square(see 17.2),2.1.9 Special package marking, if required (see 17.4), and2.1.1
7、0 Place of inspection (Section 15).3. Material3.1 The material shall be bronze of such nature and com-position (Explanatory Note 1) as to secure, by propertreatment, the qualities prescribed in this specification for thefinished wire.ROUND WIRE4. Tensile Properties4.1 Round wire shall conform to the
8、 requirements as totensile properties prescribed in Table 1.4.2 Tests on a specimen of round wire containing a jointshall show at least 95 % of the tensile strength specified inTable 1. Elongation tests shall not be made on specimenscontaining joints.4.3 Tension tests shall be made on representative
9、 samples.The elongation shall be determined as the permanent increasein length, due to the breaking of the wire in tension, measuredbetween gage marks placed originally 10 in. (254 mm) apartupon the test specimen (Explanatory Note 2). The fracture shallbe between the gage marks and not closer than 1
10、 in. (25.4 mm)to either gage mark.5. Dimensions and Permissible Variations5.1 The size of round trolley wire shall be expressed as thediameter of the wire in decimal fractions of an inch to thenearest 0.1 mil (0.0001 in.) (0.0025 mm).5.2 Wire shall be truly cylindrical in form. The diametershall not
11、 vary more than 61 % from that specified.6. Twist Test6.1 For the purpose of determining and developing defectswhich may be prejudicial to the life of trolley wire, owing to itspeculiar service as compared to that of wire for other purposes,round wire shall be subjected to the twist test described i
12、n 6.2.Round wire shall not be considered satisfactory if it does notwithstand, without breaking, at least the number of twistsprescribed in Table 2.6.2 Three twist tests shall be made on specimens 10 in. (254mm) in length between the holders of the testing machine. Thetwisting machine shall be so co
13、nstructed that there is a linearmotion of the tail stock with respect to the head. The twist shall1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.04 onConductors of Copper and Copper Alloys.Current editi
14、on approved April 1, 2017. Published April 2017. Originallyapproved in 1915. Last previous edition approved in 2012 as B9 76 (2012). DOI:10.1520/B0009-90R17.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard wa
15、s developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1be applied n
16、ot faster than 10 turns/min. All three specimensshall be twisted to destruction and shall not reveal under testany seams, pits, slivers, or surface imperfections of sufficientmagnitude to indicate inherent defects or imperfections in thewire. At the time of fracture the wire shall twist with reason-
17、able uniformity.GROOVED AND FIGURE-9 WIRE7. Tensile Properties7.1 Grooved and figure-9 wire shall conform to the appli-cable requirements as to tensile properties prescribed in Table3.7.2 Tests on a specimen of grooved or figure-9 wire con-taining a joint shall show at least 95 % of the tensile stre
18、ngthspecified in Table 3. Elongation tests shall not be made onspecimens containing joints.7.3 The tension and elongation tests for grooved or figure-9wire shall be made in the same manner as those on round wireas described in 4.3.8. Dimensions and Permissible Variations8.1 The size of the trolley w
19、ire shall be expressed as thenominal area of cross section in circular mils.8.2 The standard sizes of grooved trolley wire shall be asspecified in Fig. 1.8.3 The standard size of figure-9 wire shall be as specified inFig. 2.8.4 The weight in pounds per mile of grooved and figure-9trolley wire calcul
20、ated from the weight of a specimen not lessthan 18 in. (460 mm) in length shall not vary more than 64%from that specified in Fig. 1 for grooved wire, and Fig. 2 forfigure-9 wire.8.5 Conformance of the trolley wire to the specified dimen-sions shall be determined by taking the measurements shown inFi
21、g. 1 and Fig. 2 under the heading, “Dimensions forInspection, in.” The shape of the groove shall be checked withthe appropriate “go” and “no-go” slip gages described in Fig.3. The gages shall be applied to the ends of the samples takenfrom each reel. Samples shall be clean and the ends free fromburr
22、s. The groove shall be considered as conforming to thisspecification if the “go” gage can be pushed on the straightenedwire by hand and the “no-go” gage cannot be pushed on thewire.9. Sections9.1 Standard sections of grooved trolley wire shall beknown as the “American Standard Grooved Trolley WireSe
23、ctions” (the Standard Design of the American Transit Engi-neering Association) shown in Fig. 1.9.2 The standard section of figure-9 wire shall be as shownin Fig. 2.10. Twist Test10.1 For the purpose of determining and developing defectsthat may be prejudicial to the life of trolley wire, owing to it
24、speculiar service as compared to that of wire for other purposes,grooved wire shall be subjected to the twist test described in6.2. Grooved wire that does not withstand at least three twistswithout breaking shall not be considered satisfactory. The twisttest shall be omitted for figure-9 wire.ROUND,
25、 GROOVED, AND FIGURE-9 WIRE11. Resistivity11.1 Electrical resistivity shall be determined on represen-tative samples by resistance measurements (Explanatory Note3). At a temperature of 20C the resistivity shall not exceed thevalues prescribed in Table 4.11.2 Lower resistivities in wires conforming t
26、o the physicalqualifications may be obtained by the use of special alloys.12. Density12.1 For the purpose of calculating mass, cross-sections,and so forth, the density of the bronze (Explanatory Note 4)shall be taken as 8.89 g/cm3(0.32117 lb/in.3) at 20C (Ex-planatory Note 5).13. Joints13.1 No joint
27、s shall be made in the completed wire. Joints inthe wire and rods made prior to final drawings shall be inaccordance with the best commercial practice, and shall becapable of meeting the tensile strength requirements in 4.2 or7.2.14. Workmanship, Finish, and Appearance14.1 The wire shall be of unifo
28、rm size, shape, and qualitythroughout, and shall be free from all scale, flaws, splits, andscratches not consistent with the best commercial practice.TABLE 1 Tensile Requirements for Round Trolley WireDiameter Area Tensile Strength, min Elongationin 10 in.(254 mm),min, %in. mm cmil mm2Alloys 40 and
29、55 Alloy 80psi MPa psi MPa0.5477 13.911 300 000 152.0 64 800 447 61 500 424 4.500.4600 11.648 211 600 107.0 69 000 476 65 000 448 3.750.4096 10.404 167 800 85.0 71 000 490 67 000 462 3.250.3648 9.266 133 100 67.4 73 000 503 69 000 476 2.750.3249 8.252 105 600 53.5 76 000 524 72 000 496 2.40B9 76 (20
30、17)2Nominal Size:cmil 133 100 167 800 211 600 300 000 350 000(mm2) (67.4) (85.0) (107.00) (152.0) (177.3)Area (Explanatory Note 6):cmil 137 900 167 300 212 000 299 800 351 200in20.1083 0.1314 0.1665 0.2355 0.2258(mm2) (69.9) (84.7) (107.4) (151.9) (177.9)Weight (Explanatory Note 6):lb/mile(kg/km)220
31、5(621)2674(756)3389(955)4792(1350)5612(1581)Dimensions for Inspection, in.A 0.38820.01210.0060.42920.01210.0060.48220.01210.0060.57420.02010.0100.62020.02010.010B 0.392 0.007 0.430 0.008 0.482 0.009 0.574 0.011 0.620 0.012C 0.318 0.007 0.340 0.007 0.376 0.007 0.376 0.007 0.376 0.007Dimensions for In
32、spection, mmA 9.8620.304810.152410.620.304810.152412.220.304810.152414.620.50810.25415.720.50810.254B 9.96 0.1778 10.9 0.2032 12.2 0.2286 14.6 0.2794 15.7 0.3048C 8.08 0.1778 8.64 0.1778 9.55 0.1778 9.55 0.1778 9.55 0.1778Dimensions for Reference, in.Dradius 0.196 0.215 0.241 0.287 0.310E 0.21720.01
33、010.0050.23720.01010.0050.267 0.010 0.267 0.010 0.267 0.010F 0.200 0.220 0.250 0.250 0.250G 0.031 0.047 0.063 0.127 0.156H 0.005 0.005 0.005 0.005 0.005J 272 272 272 272 272K 512 512 512 512 512L 78 78 78 78 78Mradius 0.01520.00510.0100.01520.00510.0100.01520.00510.0100.01520.00510.0100.01520.00510.
34、010Dimensions for Reference, mmDradius 4.98 5.46 6.12 7.29 7.84E 5.5120.23410.1276.0220.25410.1276.78 0.254 6.78 0.254 6.78 0.254F 5.08 5.59 6.35 6.35 6.35G 0.7874 1.194 1.60 3.23 3.96H 0.127 0.127 0.127 0.127 0.127Mradius 0.38120.12710.2540.38120.12710.2540.38120.12710.2540.38120.12710.2540.38120.1
35、2710.254NOTE 1Dimensions H is defined by two center lines of which the upper is the center line of the radius of the groove and the lower is the center lineof the groove.FIG. 1 Standard Sections Grooved Trolley WireB9 76 (2017)315. Inspection15.1 All tests governing the acceptance or rejection of th
36、ewire, unless otherwise specified, shall be made at the place ofmanufacture with apparatus furnished by the manufacturer andin the presence of the purchaser or his representative, who shallbe furnished a copy of the tests. The manufacturer shall affordthe inspector representing the purchaser all rea
37、sonable facilitiesNominal Size, cmil 335 000Area:in.2(Explanatory Note 6)0.2642(mm2) (170.5)cmil 336 400Weight:lb/mile (Explanatory Note 6)5386(kg/km) (1517)Dimensions for Inspectionin. (mm)A (at dimension N)0.48220.01210.00612.220.304810.0015BC0.680 0.0120.376 0.007(17.3 0.3048)(9.55 0.1778)Dimensi
38、ons for Referencein. (mm)D 0.235 (5.97)Dradius 0.275 (6.98)D9radius 0.960 (24.4)E 0.267 0.010 (6.78 0.25)F 0.250 (6.35)G 0.093 (2.36)H 0.005 (1.27)J 272 (272)K 512 (512)L 78 (78)Mradius0.01520.00510.010s3.81d20.12710.254NPradius0.3420.037 0.007(8.69)(0.940 0.1778)NOTE 1Dimension H is defined by two
39、center lines of which the upper is the center line of the radius of the groove and the lower is the center lineof the groove.FIG. 2 Standard Section Figure-9 Deep-Section Grooved Trolley WireTABLE 2 Twist Test Requirements for Round WireDiameter NumberofTwistsin. mm0.5477 13.911 200.4600 11.684 230.
40、4096 10.404 250.3648 9.266 270.3249 8.252 30TABLE 3 Tensile Requirements for Grooved and Figure-9Trolley WireNominalArea,cmilTensile Strength, Minimum Elongationin 10 in.(254 mm),min, %Alloys 40 and 55 Alloy 80psi MPa psi MPaGrooved:350 000 62 500 431 59 500 410 4.00300 000 64 800 447 61 500 424 4.0
41、0211 600 69 000 476 65 000 448 3.25167 800 71 000 490 67 000 462 2.75133 100 73 000 503 69 000 476 2.25Figure-9:335 000 61 500 424 56 800 392 4.00B9 76 (2017)4to satisfy him as to the reliability of the results before the wireis delivered. If the purchaser waives inspection, and if he soelects at th
42、at time, he shall be furnished with a certified copy oftests made by the manufacturer.16. Rejection16.1 Any reel of wire that fails to conform to the require-ments prescribed in this specification may be rejected. Failureof 30 % of the number of reels ready for inspection at one timeshall be deemed
43、sufficient cause for the rejection of the wholelot.17. Packaging and Package Marking17.1 All wire shall be shipped on substantial reels, suitablefor the weight of the wire handled, and shall be well protectedfrom injury. The diameter of the reel drums shall be sufficientlylarge, not less than 30 in.
44、 (760 mm), to eliminate difficulty withwaves or kinks when the wire is strung. If reels are to belagged, it shall be so specified by the purchaser. The wire shallbe reeled with turns tightly together, in uniform layers, freefrom kinks and crosses. The relation between the vertical axisof grooved wir
45、e as finally strung and the axis of the reel shallbe as specified by the purchaser and shall be approximatelyconstant.17.2 The ends of the wire shall be securely fastened to thesides of the reel with no less than six staples. The staples shallbe at least 2 in. (50 mm) in length and made from wire no
46、t lessthan 0.145 in. (3.68 mm) in diameter. Care shall be exercisedin stapling not to damage the surface of the exposed layer ofDimensionDimensions of Gage, in. (Except as Indicated)For Trolley Wire of Nominal Size133 100 cmilFor Trolley Wire of Nominal Size167 800 cmilFor Trolley Wire of Nominal Si
47、zes 211 600,300 000, 335 000 and 350 000 cmilGo No-Go Go No-Go Go No-GoD516516516516516516E 0.223 0.00050.20720.00110.0000.243 0.00050.22720.00110.0000.278 0.00050.25720.00110.000F 0.212 0.200 0.235 0.220 0.268 0.248G 0.031 0.031 0.047 0.047 0.063 0.063J 25 29 25 29 25 29K 53 53 53 53 53 53L 78 82 7
48、8 82 78 82Mradius 0.010 0.002 0.010 0.002 0.010 0.002 0.010 0.002 0.010 0.002 0.010 0.002Nradius516516516516516516V121212121212X 111111YDimensions of Gage, mmD 7.94 7.94 7.94 7.94 7.94 7.94E 5.66 0.01275.2620.025410.0006.17 0.01275.7720.025410.0007.06 0.01276.5320.025410.000F 5.38 5.08 5.97 5.59 6.8
49、1 6.30G 0.7874 0.7874 1.19 1.19 1.60 1.60Mradius 2.54 0.0508 2.54 0.0508 2.54 0.0508 2.54 0.0508 2.54 0.0508 2.54 0.0508Nradius 1.587 1.587 1.587 1.587 1.587 1.587V 12.7 12.7 12.7 12.7 12.7 12.7X 25.4 25.4 25.4 25.4 25.4 25.4Y 25.4 25.4 25.4 25.4 25.4 25.4FIG. 3 Slip Gage for Testing Groove of Trolley WireTABLE 4 Requirements for Electrical ResistivityWireResistivity at 20C(68F), lb/mile2
