1、Designation: B 236 07Standard Specification forAluminum Bars for Electrical Purposes (Bus Bars)1This standard is issued under the fixed designation B 236; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、 number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specification covers Aluminum 1350 bar for ele
3、c-tric conductors in the tempers shown in Table 1.1.2 Aluminum and temper designations are in accordancewith ANSI H35.1/H35.1(M). The equivalent Unified Number-ing System designation is A91350 in accordance with PracticeE 527.NOTE 1For Alloy 6101 bus conductors, refer to Specification B 317/B 317M.N
4、OTE 2Prior to 1975, Aluminum 1350 was designated as EC alumi-num.1.3 A complete metric companion to Specification B 236has been developedB 236M; therefore, no metric equivalentsappear in this specification.1.4 For acceptance criteria for inclusion of new aluminumand aluminum alloys in this specifica
5、tion, see Annex A2.2. Referenced Documents2.1 The following documents of the issue in effect on dateof order acceptance form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B 193 Test Method for Resistivity of Electrical ConductorMaterialsB 317/B 317M Specification fo
6、r Aluminum-Alloy ExtrudedBar, Rod, Tube, Pipe, and Structural Profiles for ElectricalPurposes (Bus Conductor)B 557 Test Methods for Tension Testing Wrought and CastAluminum- and Magnesium-Alloy ProductsB 660 Practices for Packaging/Packing of Aluminum andMagnesium ProductsB 666/B 666M Practice for I
7、dentification Marking of Alu-minum and Magnesium ProductsB 881 Terminology Relating to Aluminum- andMagnesium-Alloy ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE34 Test Methods for ChemicalAnalysis ofAluminum andAluminum-Base AlloysE55 Pr
8、actice for Sampling Wrought Nonferrous Metals andAlloys for Determination of Chemical CompositionE 290 Test Methods for Bend Testing of Material forDuctilityE 527 Practice for Numbering Metals and Alloys (UNS)E 607 Test Method for Atomic Emission SpectrometricAnalysis Aluminum Alloys by the Point to
9、 Plane Tech-nique Nitrogen AtmosphereE 716 Practices for Sampling Aluminum and AluminumAlloys for Spectrochemical AnalysisE 1004 Practice for Determining Electrical ConductivityUsing the Electromagnetic (Eddy-Current) MethodE 1251 Test Method for Analysis of Aluminum and Alumi-num Alloys by Atomic E
10、mission Spectrometry2.3 ANSI Standards:H35.1/H35.1(M) Alloy and Temper Designation Systemsfor AluminumH35.2 Dimensional Tolerances forAluminum Mill Products2.4 Military Standard:3MIL-STD-129 Marking for Shipment and Storage2.5 Federal Standard:3Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
11、1This specification is under the jurisdiction of ASTM Committee B07 on LightMetals and Alloys and is the direct responsibility of Subcommittee B07.03 onAluminum Alloy Wrought Products.Current edition approved June 1, 2007. Published July 2007. Originally approvedin 1948. Last previous edition approv
12、ed in 2006 as B 23600 (2006).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Standardization
13、Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.TABLE 1 Tensile Property LimitsA,BTemperSpecifiedThickness, in.TensileStrength,min, ksiYield Strength(0.2 % offset),min, ksiH12 0.1251.000 12.0 8.0H112 0.1250.499 11.0 6.00.5001.
14、000 10.0 4.01.0013.000 9.0 3.5H111 All 8.5 3.5AFor purposes of determining conformance with this specification, each value fortensile strength and yield strength shall be rounded to the nearest 0.1 ksi inaccordance with the rounding method of Practice E29.BSee Annex A1.1*A Summary of Changes section
15、 appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3. Terminology3.1 Definitions: Refer to Terminology B 881 for definitionsof product terms used in this specification.3.2 Definitions of Terms Specifi
16、c to This Standard:3.2.1 capable ofthe term capable of as used in thisspecification means that the test need not be performed by theproducer of the material. However, should testing by thepurchaser establish that the material does not meet theserequirements, the material shall be subject to rejectio
17、n.4. Ordering Information4.1 Orders for material to this specification shall include thefollowing information:4.1.1 This specification designation (which includes thenumber, the year, and the revision letter, if applicable),4.1.2 Quantity in pieces or pounds,4.1.3 Temper (8.1),4.1.4 Edge contour (Se
18、ction 12),4.1.5 Diameter for rounds; distance across flats for square-cornered squares, hexagons, or octagons; width and depth forsquare-cornered rectangles,4.1.6 Length (specific or stock) (Section 14),4.2 Additionally, orders for material to this specificationshall include the following informatio
19、n when required by thepurchaser:4.2.1 Whether inspection or witness of inspection and testsby the purchasers representative is required prior to materialshipment (16.1),4.2.2 Whether marking for identification is required (18.1),4.2.3 Whether Practices B 660 applies and, if so, the levelsof preserva
20、tion, packaging, and packing required (19.3), and4.2.4 Whether certification of the material by the producer isrequired (Section 20).5. Manufacture5.1 The products covered by this specification shall beproduced by extruding or rolling, at the option of the producer,provided that the production metho
21、d results in material thatmeets all requirements of this specification.5.2 Bars in the H12 temper shall be furnished with a rolledmill finish; bars in the H111 temper, with an as-extruded millfinish; and bars in the H112 temper, with a rolled mill finishexcept that the edges shall be as sawed.6. Res
22、ponsibility for Quality Assurance6.1 Responsibility for Inspection and TestsUnless other-wise specified in the contract or purchase order, the producer isresponsible for the performance of all inspection and testrequirements specified herein. Except as otherwise specified inthe contract or order, th
23、e producer may use his own or anyother suitable facilities for the performance of the inspectionand test requirements specified herein, unless disapproved bythe purchaser. The purchaser shall have the right to performany of the inspections and tests set forth in this specificationwhere such inspecti
24、ons are deemed necessary to assure thatmaterial conforms to prescribed requirements.6.2 Lot DefinitionAn inspection lot shall consist of anidentifiable quantity of material of the same aluminum desig-nation, temper, and thickness subjected to inspection at onetime.7. Chemical Composition Requirement
25、s7.1 The material shall conform to the composition in Table2. Conformance shall be determined by the producer byanalyzing samples taken at the time the ingots or continuouslycast bars are poured, or samples taken from the finished orsemifinished product. If the producer has determined thecomposition
26、 of the material during the course of manufacture,he shall not be required to sample and analyze the finishedproduct.NOTE 3It is standard practice in the United States aluminum industryto determine conformance to the composition limits prior to furtherprocessing of ingots into wrought products. Due
27、to the continuous natureof the process, it is not practical to keep a specific ingot analysis identifiedwith a specific quantity of finished material.7.2 Number of SamplesThe number of samples taken fordetermination of chemical composition shall be as follows:7.2.1 When samples are taken at the time
28、 the ingots arepoured, at least one sample shall be taken for each group ofingots poured simultaneously from the same source of moltenmetal.7.2.2 When samples are taken from the finished or semifin-ished product, a sample shall be taken to represent each 4000lb, or fraction thereof, in the shipment,
29、 except that not morethan one sample shall be required per piece.7.3 Methods of SamplingSamples for determination ofchemical composition shall be taken in accordance with one ofthe following methods:7.3.1 Samples for chemical analysis shall be taken from thematerial by drilling, sawing, milling, tur
30、ning, or clipping arepresentative piece or pieces to obtain a prepared sample ofnot less than 75 g. Sampling shall be in accordance withPractice E55.TABLE 2 Chemical Composition LimitsAElement Composition, %Silicon, max 0.10Iron, max 0.40Copper, max 0.05Manganese, max 0.01Chromium, max 0.01Zinc, max
31、 0.05Boron, max 0.05Gallium, max 0.03Vanadium + titanium, total, max 0.02Other elements, each,Bmax 0.03Other elements, total,B,Cmax 0.10Aluminum,Dmin 99.50AAnalysis shall be made for the elements for which limits are shown in this table.BOthers includes all unlisted metallic elements. The producer m
32、ay analyzesamples for trace elements not specified in the specification. However, suchanalysis is not required and may not cover all metallic Others elements. Shouldany analysis by the producer or the purchaser establish that an Others elementexceeds the limit of Each or that the aggregate of severa
33、l Others elementsexceeds the limit of Total, the material shall be considered non-conforming.COther ElementsTotal shall be the sum of unspecified metallic elements0.010 % or more, rounded to the second decimal before determining the sum.DThe aluminum content shall be calculated by subtracting from 1
34、00.00 % thesum of all metallic elements present in amounts of 0.010 % or more each, roundedto the second decimal before determining the sum.B2360727.3.2 Sampling for spectrochemical analysis shall be inaccordance with Practices E 716. Samples for other methods ofanalysis shall be taken by methods su
35、itable for the form ofmaterial being analyzed and the type of analytical methodused.7.4 Methods of AnalysisThe determination of chemicalcomposition shall be made in accordance with suitable chemi-cal (Test Methods E34) or spectrochemical (Test MethodsE 607 and E 1251) methods. Other methods may be u
36、sed onlywhen no published ASTM method is available. In case ofdispute, the methods of analysis shall be agreed upon betweenthe producer and purchaser.8. Tensile Properties8.1 LimitsThe bars shall conform to the requirements fortensile properties as specified in Table 1.8.2 Number of SpecimensOne ten
37、sion test specimen shallbe taken from a random bar representing each 3000 lb of bar,or fraction thereof, of the same temper, thickness, and width inthe shipment.8.3 Test MethodsThe tension test shall be made in accor-dance with Test Methods B 557.9. Bend Properties9.1 Limits:9.1.1 Flatwise BendBars
38、in the H12, and H111, and H112tempers shall be capable of being bent flatwise at roomtemperature, through an angle of 90 around a pin or mandrelhaving a radius equal to the thickness of the specimen, withoutcracking or evidence of slivers or other imperfections. For aflatwise bend, the pin or mandre
39、l shall be 90 from the working(extrusion or rolling) direction, and across the greater (width)dimension of the bar. The required 90 bend shall be in theworking (extrusion or rolling) direction. This is a longitudinalbend as defined and shown in Test Methods E 290, Fig. 1.9.1.2 Edgewise BendBars in t
40、he H12 and H111 temperswhose width-to-thickness ratios are not in excess of 12 andwhose width is 4 in. or less, shall be capable of being bent atroom temperature edgewise 90 around a mandrel having theradius shown in Table 3 without cracking or localized thinningto less than 90 % of the maximum thic
41、kness within the central60 of the bend when measured along the outer edge of thebend. Bending requirements for bar wider than 4 in. shall be asagreed upon by the producer and the purchaser. For anedgewise bend, the pin or mandrel shall be 90 from theworking (extrusion or rolling) direction, and acro
42、ss the lesser(thckness) dimension of the bar. This is also a longitudinalbend as defined and shown in Test Methods E 290, Fig. 1.9.2 Test SpecimensBend test specimens shall be a fullsection of the material.9.3 Test MethodsBend tests shall be made in accordancewith Test Methods E 290.10. Density10.1
43、The density of aluminum 1350 shall be taken as 0.097lb/in.311. Electrical Properties11.1 LimitsThe resistivity of specimens selected shall notexceed 0.0283 Vmm2/m at 20C corresponding to a conduc-tivity not less than 61.0 % of the International AnnealedCopper Standard. To determine conformance with
44、this speci-fication, each value for electrical resistivity shall be rounded tothe nearest unit in the last right-hand place of figures, inaccordance with the rounding method of Practice E29.11.2 Number of SpecimensOne specimen shall be takenfrom a random bar representing each 3000 lb of bar, or frac
45、tionthereof, of the same temper and thickness in the inspection lot.11.3 Test SpecimensSpecimens for determining resistivityor conductivity shall preferably be a full section of thematerial, but may be of any suitable size or shape appropriateto the instrument used in making the determination.11.4 T
46、est MethodsElectrical resistivity or conductivityshall be determined in accordance with Test Methods B 193 orE 1004, provided that, in case of dispute, the results secured byTest Method B 193 shall be the basis for acceptance.12. Edge Contours12.1 Unless otherwise specified, bar shall be furnished w
47、ithsquare corners. When specified, bar shall be furnished withrounded corners, rounded edges or full rounded edges, asshown in Table 19.1.11 for rolled bar and Table 19.3.4 forextruded bar or with corners and edges for sawed-plate bar asshown in Table 19.2.4, of ANSI H35.2.13. Dimensional Tolerances
48、13.1 Bars ordered to this specification shall meet the re-quirements of ANSI H35.2. Table 4 lists the dimensionsinvolved and the applicable H35.2 table numbers.14. Length14.1 When stock lengths are specified, short lengths perTable 5 may be furnished.15. General Quality15.1 The bars shall be supplie
49、d with as-sawed square ends.The edges of sawed plate bus bar shall be as sawed. Unlessotherwise specified, the bars shall be supplied in the mill finishand shall be uniform as defined by the requirements of thisspecification and shall be commercially sound. Any require-ment not so covered is subject to negotiation between producerand purchaser.16. Source Inspection16.1 If the purchaser desires that his representative inspector witness the inspection and testing of the material prior toTABLE 3 Edgewise Bend RadiiSpecified Width, in. Mandrel Radius, in
