1、Designation: B 236M 07METRICStandard Specification forAluminum Bars for Electrical Purposes (Bus Bars) Metric1This standard is issued under the fixed designation B 236M; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of l
2、ast revision. A 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 1
3、350 bar for elec-tric conductors in the tempers shown in Table 1.1.2 Aluminum and temper designations are in accordancewith ANSI H35.1M. The equivalent Unified Numbering Sys-tem designation is A91350 in accordance with Practice E 527.NOTE 1For Alloy 6101 bus conductors, refer to Specification B 317/
4、B 317M.NOTE 2Prior to 1975, Aluminum 1350 was designated as EC alumi-num.1.3 This specification is the metric counterpart of Specifi-cation B 236.1.4 For acceptance criteria for inclusion of new aluminumand aluminum alloys in this specification, see Annex A1.2. Referenced Documents2.1 The following
5、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 for Aluminum-Alloy ExtrudedBar, Rod, Tube, Pipe, and Structura
6、l Profiles for ElectricalPurposes (Bus Conductor)B 557M Test Methods for Tension Testing Wrought andCast Aluminum- and Magnesium-Alloy Products MetricB 660 Practices for Packaging/Packing of Aluminum andMagnesium ProductsB 666/B 666M Practice for Identification Marking of Alu-minum and Magnesium Pro
7、ductsB 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 Practice for Sampling Wrought Nonferrous Metals andAll
8、oys 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 Plane Tech-nique Nitrogen AtmosphereE 716 Practices
9、 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 Emission Spectrometry2.3 ANSI Standards:H35.1/H35.1M
10、Alloy and Temper Designation Systems forAluminumH35.2M Dimensional Tolerances for Aluminum Mill Prod-ucts1This 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 edi
11、tion approved June 1, 2007. Published June 2007. Originallyapproved in 1983. Last previous edition approved in 2006 as B 236M 00 (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 in
12、formation, refer to the standards Document Summary page onthe ASTM website.TABLE 1 Tensile Property LimitsA,BTemperSpecified Thickness, mm TensileStrength,min, MPaYield Strength,min, (0.2 % offset)MPaOver ThroughH12 3.20 25.00 85 55H112 3.20 12.50 75 4012.50 25.00 70 3025.00 40.00 60 25H111 All 60 2
13、5AFor purposes of determining conformance with this specification, each value fortensile strength and yield strength shall be rounded to the nearest 1 MPa inaccordance with the rounding-off method of Practice E29.BSee Appendix X2.1*A Summary of Changes section appears at the end of this standard.Cop
14、yright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.2.4 Military Standard:MIL-STD-129 Marking for Shipment and Storage32.5 Federal Standard:Fed. Std. No. 123 Marking for Shipment (Civil Agencies)33. Terminology3.1 Definitions: Refer to Termi
15、nology B 881 for definitionsof product terms used in this specification.3.2 Definitions of Terms Specific 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 thepurchase
16、r establish that the material does not meet theserequirements, the material shall be subject to rejection.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 revi
17、sion letter, if applicable),4.1.2 Quantity in pieces or kilograms,4.1.3 Temper (8.1),4.1.4 Edge contour (Section 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) (Se
18、ction 14),4.2 Additionally, orders for material to this specificationshall include the following information 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 fo
19、r identification is required (18.1),4.2.3 Whether Practices B 660 applies and, if so, the levelsof preservation, 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
20、 shall beproduced by extruding or rolling, at the option of the producer,provided that the production method 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 millf
21、inish; and bars in the H112 temper, with a rolled mill finishexcept that the edges shall be as sawed.6. Responsibility 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
22、inspection and testrequirements specified herein. Except as otherwise specified inthe contract or order, the 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 h
23、ave the right to performany of the inspections and tests set forth in this specificationwhere such inspections 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
24、 desig-nation, temper, and thickness subjected to inspection at onetime.7. Chemical Composition Requirements7.1 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 poure
25、d, or samples taken from the finished orsemifinished product. If the producer has determined thecomposition 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 deter
26、mine conformance to the composition limits prior to furtherprocessing of ingots into wrought products. Due 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
27、taken fordetermination of chemical composition shall be as follows:7.2.1 When samples are taken at the time 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 sem
28、ifin-ished product, a sample shall be taken to represent each 2000kg or fraction thereof, in the shipment, except that not morethan one sample shall be required per piece.3Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098.TA
29、BLE 2 Chemical RequirementsAElement Composition, %Silicon, max 0.10Iron, max 0.40Copper, max 0.05Manganese, max 0.01Chromium, max 0.01Zinc, max 0.05Boron, max 0.05Gallium, max 0.03Vanadium + titanium, total, max 0.02Other elements, each,Bmax 0.03Other elements, total,BCmax 0.10Aluminum,Dmin 99.50AAn
30、alysis shall be made for the elements for which limits are shown in this table.BOthers includes all unlisted metallic elements. The producer may analyzesamples for trace elements not specified in the specification. However, suchanalysis is not required and may not cover all metallic Others elements.
31、 Shouldany analysis by the producer or the purchaser establish that an Others elementexceeds the limit of Each or that the aggregate of several Others elementsexceeds the limit of Total, the material shall be considered non-conforming.COther ElementsTotal shall be the sum of unspecified metallic ele
32、ments0.010 % or more, rounded to the second decimal before determining the sum.DThe aluminum content shall be calculated by subtracting from 100.00 % thesum of all metallic elements present in amounts of 0.010 % or more each, roundedto the second decimal before determining the sum.B236M0727.3 Method
33、s 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, turning, or clipping arepresentative piece or pieces to obtain a prepared samp
34、le ofnot less than 75 g. Sampling shall be in accordance withPractice E55.7.3.2 Sampling for spectrochemical analysis shall be inaccordance with Practices E 716. Samples for other methods ofanalysis shall be taken by methods suitable for the form ofmaterial being analyzed and the type of analytical
35、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 used onlywhen no published ASTM method is available. In case ofdispute, t
36、he 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 tension test specimen shallbe taken from a random bar representing each 150
37、0 kg 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 557M.9. Bend Properties9.1 Limits:9.1.1 Flatwise BendBars in the H12, and H111, and H112tempers shall be capable of being bent fl
38、atwise 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 mandrel shall be 90 from the working(extrusion or rolling) direction, and acr
39、oss 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 Method E 290, Fig. 19.1.2 Edgewise BendBars in the H12 and H111 temperswhose width-to-thickness ratios are not in excess
40、of 12 andwhose width is 100 mm or less, shall be capable of being bentat room temperature edgewise 90 around a mandrel having aradius shown in Table 3 without cracking or localized thinningto less than 90 % of the maximum thickness within the central60 of the bend when measured along the outer edge
41、of thebend. Bending requirements for bar wider than 100 mm shallbe as agreed upon by the producer and the purchaser. For anedgewise bend, the pin or mandrel shall be 90 from theworking (extrusion or rolling) direction, and across the lesser(thickness) dimension of the bar. This is also a longitudina
42、lbend as defined and shown in Test Method 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 Method E 290.10. Density10.1 The density of Aluminum 1350 shall be taken as 2705kg/m3.11. Electrical Pr
43、operties11.1 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 this speci-fication, each value for electrical resistivity shall be rounded
44、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 1500 kg of bar, or fractionthereof, of the same temper and thickness in the inspection lot.11.3 Tes
45、t 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 Test MethodsElectrical resistivity or conductivityshall be determined in acco
46、rdance with Test Methods B 193 orE 1004, provided that, in case of dispute, the results secured byTest Methods B 193 shall be the basis for acceptance.12. Edge Contours12.1 Unless otherwise specified bar shall be furnished withsquare corners. When specified, bar shall be furnished withrounded corner
47、s, 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 H35.2M.13. Dimensional Tolerances13.1 Bars ordered to this specification shall meet the re-quirements of ANS
48、I H35.2M. Table 4 lists the dimensionsinvolved and the applicable H35.2M 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 supplied with as-sawed square ends.The edges of sawed plate bus bar shall be as
49、sawed. UnlessTABLE 3 Edgewise Bend RadiiSpecified Width, mmMandrel Radius, mmOver Through. 12.50 12.512.50 25.00 2525.00 40.00 4040.00 50.00 5050.00 65.00 6565.00 75.00 7575.00 90.00 9090.00 100.00 100B236M073otherwise 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 wit
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