ASTM B236-00(2006)
(Specification)Standard Specification for Aluminum Bars for Electrical Purposes (Bus Bars)
Standard Specification for Aluminum Bars for Electrical Purposes (Bus Bars)
SCOPE
1.1 This specification covers Aluminum 1350 bar for electric conductors in the tempers shown in Table 1.
1.2 Aluminum and temper designations are in accordance with ANSI H35.1. The equivalent Unified Numbering System designation is A91350 in accordance with Practice E 527. For Alloy 6101 bus conductors, refer to Specification B 317.Note 1
Prior to 1975, Aluminum 1350 was designated as EC aluminum.
1.3 A complete metric companion to Specification B 236 has been developed-B 236M; therefore, no metric equivalents appear in this specification.
1.4 For acceptance criteria for inclusion of new aluminum and aluminum alloys in this specification, see Annex A2.
General Information
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Standards Content (Sample)
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Designation: B 236 – 00 (Reapproved 2006)
Standard Specification for
Aluminum Bars for Electrical Purposes (Bus Bars)
This standard is issued under the fixed designation B 236; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript 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.
A,B
TABLE 1 Tensile Property Limits
1. Scope
Tensile Yield Strength
1.1 This specification covers Aluminum 1350 bar for elec-
Specified
Temper Strength, (0.2 % offset),
Thickness, in.
tric conductors in the tempers shown in Table 1.
min, ksi min, ksi
1.2 Aluminum and temper designations are in accordance
H12 0.125–1.000 12.0 8.0
with ANSI H35.1. The equivalent Unified Numbering System
H112 0.125–0.499 11.0 6.0
0.500–1.000 10.0 4.0
designation is A91350 in accordance with Practice E 527.
1.001–3.000 9.0 3.5
H111 All 8.5 3.5
NOTE 1—For Alloy 6101 bus conductors, refer to Specification B 317.
A
NOTE 2—Prior to 1975, Aluminum 1350 was designated as EC alumi-
Forpurposesofdeterminingconformancewiththisspecification,eachvaluefor
num. tensile strength and yield strength shall be rounded to the nearest 0.1 ksi in
accordance with the rounding method of PracticeE29.
B
1.3 A complete metric companion to Specification B 236
See Annex A1.
hasbeendeveloped—B 236M;therefore,nometricequivalents
appear in this specification.
Analysis of Aluminum and Aluminum Alloys by the
1.4 For acceptance criteria for inclusion of new aluminum
Point-to-Plane Technique
and aluminum alloys in this specification, see Annex A2.
E 290 Test Methods for Bend Testing of Material for
Ductility
2. Referenced Documents
E 527 Practice for Numbering Metals and Alloys (UNS)
2.1 The following documents of the issue in effect on date
E 607 Test Method for Atomic Emission Spectrometric
of order acceptance form a part of this specification to the
Analysis Aluminum Alloys by the Point to Plane Tech-
extent referenced herein:
nique Nitrogen Atmosphere
2.2 ASTM Standards:
E 716 Practices for Sampling Aluminum and Aluminum
B 193 Test Method for Resistivity of Electrical Conductor
Alloys for Spectrochemical Analysis
Materials
E 1004 Practice for Determining Electrical Conductivity
B 557 Test Methods for Tension Testing Wrought and Cast
Using the Electromagnetic (Eddy-Current) Method
Aluminum- and Magnesium-Alloy Products
E 1251 Test Method for Analysis of Aluminum and Alumi-
B 660 Practices for Packaging/Packing of Aluminum and
num Alloys by Atomic Emission Spectrometry
Magnesium Products
2.3 ANSI Standards:
E29 Practice for Using Significant Digits in Test Data to
H35.1 Alloy and Temper Designation Systems for Alumi-
Determine Conformance with Specifications
num
E34 Test Methods for ChemicalAnalysis ofAluminum and
H35.2 DimensionalTolerances forAluminum Mill Products
Aluminum-Base Alloys
2.4 Military Standard:
E55 PracticeforSamplingWroughtNonferrousMetalsand
MIL-STD-129 Marking for Shipment and Storage
Alloys for Determination of Chemical Composition
2.5 Federal Standard:
E 227 Test Method for Optical Emission Spectrometric
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
3. Terminology
3.1 Definitions:
This specification is under the jurisdiction of ASTM Committee B07 on Light
Metals and Alloys and is the direct responsibility of Subcommittee B07.03 on
3.1.1 bus conductor—a rigid electric conductor of any cross
Aluminum Alloy Wrought Products.
section.
Current edition approved May 1, 2006. Published May 2006. Originally
approved in 1948. Last previous edition approved in 2000 as B 236–00.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Withdrawn.
Standards volume information, refer to the standard’s Document Summary page on Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
the ASTM website. Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098.
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B 236 – 00 (2006)
3.1.2 bar—a solid product that is long in relation to cross other suitable facilities for the performance of the inspection
section, which is square or rectangular (excluding plate and and test requirements specified herein, unless disapproved by
flattened wire) with sharp or rounded corners or edges, or is a the purchaser. The purchaser shall have the right to perform
regular hexagon or octagon, and in which at least one perpen- any of the inspections and tests set forth in this specification
dicular distance between parallel faces is 0.375 in. or greater. where such inspections are deemed necessary to assure that
3.1.3 extruded bar—bar brought to final dimensions by material conforms to prescribed requirements.
extruding.
6.2 Lot Definition—An inspection lot shall consist of an
3.1.4 rolled bar—bar brought to final dimensions by hot identifiable quantity of material of the same aluminum desig-
rolling.
nation, temper, and thickness subjected to inspection at one
3.1.5 sawed-plate bar—barbroughttofinalthicknessbyhot time.
or cold rolling and to final width by sawing (sawed edges).
3.2 Definitions of Terms Specific to This Standard:
7. Chemical Composition Requirements
3.2.1 capable of—the term capable of as used in this
7.1 The material shall conform to the composition in Table
specification means that the test need not be performed by the
2. Conformance shall be determined by the producer by
producer of the material. However, should testing by the
analyzing samples taken at the time the ingots or continuously
purchaser establish that the material does not meet these
cast bars are poured, or samples taken from the finished or
requirements, the material shall be subject to rejection.
semifinished product. If the producer has determined the
composition of the material during the course of manufacture,
4. Ordering Information
he shall not be required to sample and analyze the finished
4.1 Orders for material to this specification shall include the
product.
following information:
NOTE 3—It is standard practice in the United States aluminum industry
4.1.1 This specification designation (which includes the
to determine conformance to the composition limits prior to further
number, the year, and the revision letter, if applicable),
processing of ingots into wrought products. Due to the continuous nature
4.1.2 Quantity in pieces or pounds,
of the process, it is not practical to keep a specific ingot analysis identified
4.1.3 Temper (8.1),
with a specific quantity of finished material.
4.1.4 Edge contour (Section 12),
7.2 Number of Samples—The number of samples taken for
4.1.5 Diameter for rounds; distance across flats for square-
determination of chemical composition shall be as follows:
cornered squares, hexagons, or octagons; width and depth for
7.2.1 When samples are taken at the time the ingots are
square-cornered rectangles,
poured, at least one sample shall be taken for each group of
4.1.6 Length (specific or stock) (Section 14),
ingots poured simultaneously from the same source of molten
4.2 Additionally, orders for material to this specification
metal.
shall include the following information when required by the
7.2.2 When samples are taken from the finished or semifin-
purchaser:
ished product, a sample shall be taken to represent each 4000
4.2.1 Whether inspection or witness of inspection and tests
lb, or fraction thereof, in the shipment, except that not more
by the purchaser’s representative is required prior to material
than one sample shall be required per piece.
shipment (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 levels
A
TABLE 2 Chemical Composition Limits
of preservation, packaging, and packing required (19.3), and
4.2.4 Whethercertificationofthematerialbytheproduceris Element Composition, %
required (Section 20).
Silicon, max 0.10
Iron, max 0.40
Copper, max 0.05
5. Manufacture
Manganese, max 0.01
Chromium, max 0.01
5.1 The products covered by this specification shall be
Zinc, max 0.05
produced by extruding or rolling, at the option of the producer,
Boron, max 0.05
provided that the production method results in material that
Gallium, max 0.03
Vanadium + titanium, total, max 0.02
meets all requirements of this specification.
B
Other elements, each, max 0.03
5.2 Bars in the H12 temper shall be furnished with a rolled
B,C
Other elements, total, max 0.10
D
mill finish; bars in the H111 temper, with an as-extruded mill Aluminum, min 99.50
A
finish; and bars in the H112 temper, with a rolled mill finish
Analysisshallbemadefortheelementsforwhichlimitsareshowninthistable.
B
Others includes all unlisted metallic elements. The producer may analyze
except that the edges shall be as sawed.
samples for trace elements not specified in the specification. However, such
analysis is not required and may not cover all metallic Others elements. Should
6. Responsibility for Quality Assurance
any analysis by the producer or the purchaser establish that an Others element
exceeds the limit of Each or that the aggregate of several Others elements
6.1 Responsibility for Inspection and Tests—Unless other-
exceeds the limit of Total, the material shall be considered non-conforming.
C
wise specified in the contract or purchase order, the producer is Other Elements—Total shall be the sum of unspecified metallic elements
0.010 % or more, rounded to the second decimal before determining the sum.
responsible for the performance of all inspection and test
D
The aluminum content shall be calculated by subtracting from 100.00 % the
requirements specified herein. Except as otherwise specified in
sumofallmetallicelementspresentinamountsof0.010 %ormoreeach,rounded
the contract or order, the producer may use his own or any to the second decimal before determining the sum.
B 236 – 00 (2006)
7.3 Methods of Sampling—Samples for determination of 9.2 Test Specimens—Bend test specimens shall be a full
chemical composition shall be taken in accordance with one of section of the material.
the following methods: 9.3 Test Methods—Bend tests shall be made in accordance
7.3.1 Samples for chemical analysis shall be taken from the with Test Method E 290.
material by drilling, sawing, milling, turning, or clipping a
10. Density
representative piece or pieces to obtain a prepared sample of
not less than 75 g. Sampling shall be in accordance with
10.1 The density of aluminum 1350 shall be taken as
PracticeE55.
0.097% lb/in.
7.3.2 Sampling for spectrochemical analysis shall be in
11. Electrical Properties
accordancewithPracticesE 716.Samplesforothermethodsof
analysis shall be taken by methods suitable for the form of
11.1 Limits—The resistivity of specimens selected shall not
material being analyzed and the type of analytical method
exceed 15.6 V·lb /ft at 20°C corresponding to a conductivity
used.
not less than 61.0 % of the International Annealed Copper
7.4 Methods of Analysis—The determination of chemical
Standard. To determine conformance with this specification,
composition shall be made in accordance with suitable chemi-
each value for electrical resistivity shall be rounded to the
cal (Test Methods E34), or spectrochemical (Test Methods
nearest unit in the last right-hand place of figures, in accor-
E 227, E 607, and E 1251), methods. Other methods may be
dance with the rounding method of PracticeE29.
used only when no published ASTM method is available. In
11.2 Number of Specimens—One specimen shall be taken
case of dispute, the methods of analysis shall be agreed upon
from a random bar representing each 3000 lb of bar, or fraction
between the producer and purchaser.
thereof, of the same temper and thickness in the inspection lot.
11.3 Test Specimens—Specimens for determining resistivity
8. Tensile Properties
or conductivity shall preferably be a full section of the
8.1 Limits—The bars shall conform to the requirements for material, but may be of any suitable size or shape appropriate
to the instrument used in making the determination.
tensile properties as specified in Table 1.
8.2 Number of Specimens—One tension test specimen shall 11.4 Test Methods—Electrical resistivity or conductivity
be taken from a random bar representing each 3000 lb of bar, shall be determined in accordance with Test Methods B 193 or
E 1004, provided that, in case of dispute, the results secured by
or fraction thereof, of the same temper, thickness, and width in
the shipment. Test Method B 193 shall be the basis for acceptance.
8.3 Test Methods—The tension test shall be made in accor-
12. Edge Contours
dance with Test Methods B 557.
12.1 Unless otherwise specified, bar shall be furnished with
9. Bend Properties square corners. When specified, bar shall be furnished with
rounded corners, rounded edges or full rounded edges, as
9.1 Limits:
shown in Table 19.1.11 for rolled bar and Table 19.3.4 for
9.1.1 Flatwise Bend—Bars in the H12, and H111, and H112
extruded bar or with corners and edges for sawed-plate bar as
tempers shall be capable of being bent flatwise at room
shown in Table 19.2.4, of ANSI H35.2.
temperature, through an angle of 90° around a pin or mandrel
having a radius equal to the thickness of the specimen, without
13. Dimensional Tolerances
cracking or evidence of slivers or other imperfections.
13.1 Bars ordered to this specification shall meet the re-
9.1.2 Edgewise Bend—Bars in the H12 and H111 tempers
quirements of ANSI H35.2. Table 4 lists the dimensions
whose width-to-thickness ratios are not in excess of 12 and
involved and the applicable H35.2 table numbers.
whose width is 4 in. or less, shall be capable of being bent at
room temperature edgewise 90° around a mandrel having the
14. Length
radius shown in Table 3 without cracking or localized thinning
to less than 90 % of the maximum thickness within the central
14.1 When stock lengths are specified, short lengths per
60° of the bend when measured along the outer edge of the Table 5 may be furnished.
bend. Bending requirements for bar wider than 4 in. shall be as
15. General Quality
agreed upon by the producer and the purchaser.
15.1 The bars shall be supplied with as-sawed square ends.
The edges of sawed plate bus bar shall be as sawed. Unless
TABLE 3 Edgewise Bend Radii
otherwise specified, the bars shall be supplied in the mill finish
Specified Width, in. Mandrel Radius, in. and shall be uniform as defined by the requirements of this
1 specification and shall be commercially sound. Any requir
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