ASTM B236-07(2015)
(Specification)Standard Specification for Aluminum Bars for Electrical Purposes (Bus Bars)
Standard Specification for Aluminum Bars for Electrical Purposes (Bus Bars)
ABSTRACT
This specification covers Aluminum 1350 bar for electric conductors in the tempers. The tempers are designated as H12, H112, and H111. The products covered by this specification shall be produced by extruding or rolling. Bars in the H12 temper shall be furnished with a rolled mill finish; bars in the H111 temper, with an as-extruded mill finish; and bars in the H112 temper, with a rolled mill finish except that the edges shall be as sawed. The bars shall be subjected to tension test to determine their tensile and yield strengths. Bars in the H12, and H111, and H112 tempers shall be capable of being bent flatwise at room temperature, through an angle of 90° around a pin or mandrel having a radius equal to the thickness of the specimen, without cracking or evidence of slivers or other imperfections. For a flatwise bend, the pin or mandrel 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 the working (extrusion or rolling) direction. Bars in the H12 and H111 tempers whose width-to-thickness ratios are not in excess of 12 and whose width is 100 mm or less, shall be capable of being bent at room temperature edgewise 90° around a mandrel without cracking or localized thinning to less than 90 % of the maximum thickness within the central 60° of the bend when measured along the outer edge of the bend. Electrical resistivity and conductivity shall be measured.
SCOPE
1.1 This specification covers Aluminum 1350 bar for electric conductors in the tempers shown in Table 1. (A) For purposes of determining conformance with this specification, each value for tensile strength and yield strength shall be rounded to the nearest 0.1 ksi in accordance with the rounding method of Practice E29.(B) See Annex A1.
1.2 Aluminum and temper designations are in accordance with ANSI H35.1/H35.1(M). The equivalent Unified Numbering System designation is A91350 in accordance with Practice E527.
Note 1: For Alloy 6101 bus conductors, refer to Specification B317/B317M.
Note 2: Prior to 1975, Aluminum 1350 was designated as EC aluminum.
1.3 A complete metric companion to Specification B236 has been developed—B236M; 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.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: B236 −07 (Reapproved 2015)
Standard Specification for
Aluminum Bars for Electrical Purposes (Bus Bars)
This standard is issued under the fixed designation B236; 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.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* B666/B666MPractice for Identification Marking of Alumi-
num and Magnesium Products
1.1 This specification covers Aluminum 1350 bar for elec-
B881Terminology Relating toAluminum- and Magnesium-
tric conductors in the tempers shown in Table 1.
Alloy Products
1.2 Aluminum and temper designations are in accordance
E29Practice for Using Significant Digits in Test Data to
withANSI H35.1/H35.1(M). The equivalent Unified Number-
Determine Conformance with Specifications
ing System designation isA91350 in accordance with Practice
E34Test Methods for Chemical Analysis of Aluminum and
E527.
Aluminum-Base Alloys
E55Practice for Sampling Wrought Nonferrous Metals and
NOTE 1—For Alloy 6101 bus conductors, refer to Specification B317/
B317M. Alloys for Determination of Chemical Composition
NOTE 2—Prior to 1975, Aluminum 1350 was designated as EC
E290Test Methods for Bend Testing of Material for Ductil-
aluminum.
ity
1.3 AcompletemetriccompaniontoSpecificationB236has
E527Practice for Numbering Metals and Alloys in the
been developed—B236M; therefore, no metric equivalents
Unified Numbering System (UNS)
appear in this specification.
E607 Test Method for Atomic Emission Spectrometric
Analysis Aluminum Alloys by the Point to Plane Tech-
1.4 For acceptance criteria for inclusion of new aluminum
nique Nitrogen Atmosphere (Withdrawn 2011)
and aluminum alloys in this specification, see Annex A2.
E716Practices for Sampling and Sample Preparation of
Aluminum and Aluminum Alloys for Determination of
2. Referenced Documents
Chemical Composition by Spectrochemical Analysis
2.1 The following documents of the issue in effect on date
E1004Test Method for Determining Electrical Conductivity
of order acceptance form a part of this specification to the
Using the Electromagnetic (Eddy-Current) Method
extent referenced herein:
E1251Test Method for Analysis of Aluminum and Alumi-
2.2 ASTM Standards:
num Alloys by Spark Atomic Emission Spectrometry
B193Test Method for Resistivity of Electrical Conductor
2.3 ANSI Standards:
Materials
H35.1/H35.1(M)AlloyandTemperDesignationSystemsfor
B317/B317MSpecification for Aluminum-Alloy Extruded
Aluminum
Bar, Rod, Tube, Pipe, Structural Profiles, and Profiles for
H35.2 DimensionalTolerancesforAluminumMillProducts
Electrical Purposes (Bus Conductor)
2.4 Military Standard:Available from Standardization
B557Test Methods for Tension Testing Wrought and Cast
Documents Order Desk, DODSSP, Bldg. 4, Section D, 700
Aluminum- and Magnesium-Alloy Products
Robbins Ave., Philadelphia, PA 19111-5098, http://
B660Practices for Packaging/Packing of Aluminum and
www.dodssp.daps.mil.
Magnesium Products
MIL-STD-129Marking for Shipment and Storage
2.5 Federal Standard:
Fed. Std. No. 123Marking for Shipment (Civil Agencies)
This specification is under the jurisdiction ofASTM Committee B07 on Light
Metals and Alloys and is the direct responsibility of Subcommittee B07.03 on
3. Terminology
Aluminum Alloy Wrought Products.
Current edition approved Oct. 1, 2015. Published October 2015. Originally
3.1 Definitions: Refer to Terminology B881 for definitions
approved in 1948. Last previous edition approved in 2007 as B236–07. DOI:
of product terms used in this specification.
10.1520/B0236-07R15.
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
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959. United States
B236 − 07 (2015)
A,B
TABLE 1 Tensile Property Limits
requirements specified herein. Except as otherwise specified in
Tensile Yield Strength
the contract or order, the producer may use his own or any
Specified
Temper Strength, (0.2% offset),
Thickness, in. other suitable facilities for the performance of the inspection
min, ksi min, ksi
and test requirements specified herein, unless disapproved by
H12 0.125–1.000 12.0 8.0
the purchaser. The purchaser shall have the right to perform
H112 0.125–0.499 11.0 6.0
0.500–1.000 10.0 4.0
any of the inspections and tests set forth in this specification
1.001–3.000 9.0 3.5
where such inspections are deemed necessary to assure that
H111 All 8.5 3.5
material conforms to prescribed requirements.
A
For purposes of determining conformance with this specification, each value for
tensile strength and yield strength shall be rounded to the nearest 0.1 ksi in
6.2 Lot Definition—An inspection lot shall consist of an
accordance with the rounding method of Practice E29.
B identifiable quantity of material of the same aluminum
See AnnexA1.
designation, temper, and thickness subjected to inspection at
one time.
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
4. Ordering Information composition of the material during the course of manufacture,
he shall not be required to sample and analyze the finished
4.1 Ordersformaterialtothisspecificationshallincludethe
product.
following information:
4.1.1 This specification designation (which includes the NOTE 3—It is standard practice in the United States aluminum industry
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,
oftheprocess,itisnotpracticaltokeepaspecificingotanalysisidentified
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
by the purchaser’s representative is required prior to material
shipment (16.1),
A
TABLE 2 Chemical Composition Limits
4.2.2 Whether marking for identification is required (18.1),
Element Composition, %
4.2.3 Whether Practices B660 applies and, if so, the levels
Silicon, max 0.10
of preservation, packaging, and packing required (19.3), and
Iron, max 0.40
Copper, max 0.05
4.2.4 Whethercertificationofthematerialbytheproduceris
Manganese, max 0.01
required (Section 20).
Chromium, max 0.01
Zinc, max 0.05
5. Manufacture
Boron, max 0.05
Gallium, max 0.03
5.1 The products covered by this specification shall be
Vanadium+titanium, total, max 0.02
B
produced by extruding or rolling, at the option of the producer, Other elements, each, max 0.03
B,C
Other elements, total, max 0.10
provided that the production method results in material that
D
Aluminum, min 99.50
meets all requirements of this specification.
A
Analysis shall be made for the elements for which limits are shown in this table.
B
5.2 Bars in the H12 temper shall be furnished with a rolled Others includes all unlisted metallic elements. The producer may analyze
samples for trace elements not specified in the specification. However, such
mill finish; bars in the H111 temper, with an as-extruded mill
analysis is not required and may not cover all metallic Others elements. Should
finish; and bars in the H112 temper, with a rolled mill finish
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
except that the edges shall be as sawed.
exceeds the limit of Total, the material shall be considered non-conforming.
C
OtherElements—Totalshallbethesumofunspecifiedmetallicelements0.010%
6. Responsibility for Quality Assurance
or more, rounded to the second decimal before determining the sum.
D
Thealuminumcontentshallbecalculatedbysubtractingfrom100.00%thesum
6.1 Responsibility for Inspection and Tests—Unless other-
of all metallic elements present in amounts of 0.010% or more each, rounded to
wisespecifiedinthecontractorpurchaseorder,theproduceris
the second decimal before determining the sum.
responsible for the performance of all inspection and test
B236 − 07 (2015)
TABLE 3 Edgewise Bend Radii
lb, or fraction thereof, in the shipment, except that not more
than one sample shall be required per piece. Specified Width, in. Mandrel Radius, in.
0.500 and under ⁄2
7.3 Methods of Sampling—Samples for determination of
0.501–1.000 1
chemical composition shall be taken in accordance with one of 1
1.001–1.500 1 ⁄2
1.501–2.000 2
the following methods:
2.001–2.500 2 ⁄2
7.3.1 Samples for chemical analysis shall be taken from the
2.501–3.000 3
material by drilling, sawing, milling, turning, or clipping a 3.001–3.500 3 ⁄2
3.501–4.000 4
representative piece or pieces to obtain a prepared sample of
not less than 75 g. Sampling shall be in accordance with
Practice E55.
7.3.2 Sampling for spectrochemical analysis shall be in
accordance with Practices E716. Samples for other methods of
(thckness) dimension of the bar. This is also a longitudinal
analysis shall be taken by methods suitable for the form of
bend as defined and shown in Test Methods E290, Fig. 1.
material being analyzed and the type of analytical method
9.2 Test Specimens—Bend test specimens shall be a full
used.
section of the material.
7.4 Methods of Analysis—The determination of chemical
9.3 Test Methods—Bend tests shall be made in accordance
composition shall be made in accordance with suitable chemi-
with Test Methods E290.
cal (Test Methods E34) or spectrochemical (Test Methods
E607 and E1251) methods. Other methods may be used only
10. Density
when no published ASTM method is available. In case of
10.1 The density of aluminum 1350 shall be taken as 0.097
dispute, the methods of analysis shall be agreed upon between
lb/in.
the producer and purchaser.
11. Electrical Properties
8. Tensile Properties
11.1 Limits—The resistivity of specimens selected shall not
8.1 Limits—The bars shall conform to the requirements for
exceed 0.0283 Ω·mm /m at 20°C corresponding to a conduc-
tensile properties as specified in Table 1.
tivity not less than 61.0% of the International Annealed
8.2 Number of Specimens—One tension test specimen shall
Copper Standard. To determine conformance with this
be taken from a random bar representing each 3000 lb of bar,
specification, each value for electrical resistivity shall be
or fraction thereof, of the same temper, thickness, and width in
rounded to the nearest unit in the last right-hand place of
the shipment.
figures, in accordance with the rounding method of Practice
E29.
8.3 Test Methods—The tension test shall be made in accor-
dance with Test Methods B557.
11.2 Number of Specimens—One specimen shall be taken
fromarandombarrepresentingeach3000lbofbar,orfraction
9. Bend Properties
thereof, of the same temper and thickness in the inspection lot.
9.1 Limits:
11.3 Test Specimens—Specimens for determining resistivity
9.1.1 Flatwise Bend—Bars in the H12, and H111, and H112
or conductivity shall preferably be a full section of the
tempers shall be capable of being bent flatwise at room
material, but may be of any suitable size or shape appropriate
temperature, through an angle of 90° around a pin or mandrel
to the instrument used in making the determination.
havingaradiusequaltothethicknessofthespecimen,without
11.4 Test Methods—Electrical resistivity or conductivity
cracking or evidence of slivers or other imperfections. For a
shall be determined in accordance with Test Methods B193 or
flatwisebend,thepinormandrelshallbe90°fromtheworking
E1004, provided that, in case of dispute, the results secured by
(extrusion or rolling) direction, and across the greater (width)
Test Method B193 shall be the basis for acceptance.
dimension of the bar. The required 90° bend shall be in the
working (extrusion or rolling) direction. This is a longitudinal
12. Edge Contours
bend as defined and shown in Test Methods E290, Fig. 1.
12.1 Unless otherwise specified, bar shall be furnished with
9.1.2 Edgewise Bend—Bars in the H12 and H111 tempers
square corners. When specified, bar shall be furnished with
whose width-to-thickness ratios are not in excess of 12 and
rounded corners, rounded edges or full rounded edges, as
whose width is 4 in. or less, shall be capable of being bent at
shown in Table19.1.11 for rolled bar and Table19.3.4 for
room temperature edgewise 90° around a mandrel having the
extruded bar or with corners and edges for sawed-plate bar as
radius shown in Table 3 without cracking or localized thinning
shown in Table19.2.4, of ANSI H35.2.
to less than 90% of the maximum thickness within the central
60° of the bend when measured along the outer edge of the
13. Dimensional Tolerances
bend.Bendingrequirementsforbarwiderthan4in.shallbeas
agreed upon by the producer and the purcha
...
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: B236 − 07 (Reapproved 2015)
Standard Specification for
Aluminum Bars for Electrical Purposes (Bus Bars)
This standard is issued under the fixed designation B236; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* B666/B666M Practice for Identification Marking of Alumi-
num and Magnesium Products
1.1 This specification covers Aluminum 1350 bar for elec-
B881 Terminology Relating to Aluminum- and Magnesium-
tric conductors in the tempers shown in Table 1.
Alloy Products
1.2 Aluminum and temper designations are in accordance
E29 Practice for Using Significant Digits in Test Data to
with ANSI H35.1/H35.1(M). The equivalent Unified Number-
Determine Conformance with Specifications
ing System designation is A91350 in accordance with Practice
E34 Test Methods for Chemical Analysis of Aluminum and
E527.
Aluminum-Base Alloys
E55 Practice for Sampling Wrought Nonferrous Metals and
NOTE 1—For Alloy 6101 bus conductors, refer to Specification B317/
B317M.
Alloys for Determination of Chemical Composition
NOTE 2—Prior to 1975, Aluminum 1350 was designated as EC
E290 Test Methods for Bend Testing of Material for Ductil-
aluminum.
ity
1.3 A complete metric companion to Specification B236 has
E527 Practice for Numbering Metals and Alloys in the
been developed—B236M; therefore, no metric equivalents
Unified Numbering System (UNS)
appear in this specification.
E607 Test Method for Atomic Emission Spectrometric
Analysis Aluminum Alloys by the Point to Plane Tech-
1.4 For acceptance criteria for inclusion of new aluminum
nique Nitrogen Atmosphere (Withdrawn 2011)
and aluminum alloys in this specification, see Annex A2.
E716 Practices for Sampling and Sample Preparation of
Aluminum and Aluminum Alloys for Determination of
2. Referenced Documents
Chemical Composition by Spectrochemical Analysis
2.1 The following documents of the issue in effect on date
E1004 Test Method for Determining Electrical Conductivity
of order acceptance form a part of this specification to the
Using the Electromagnetic (Eddy-Current) Method
extent referenced herein:
E1251 Test Method for Analysis of Aluminum and Alumi-
2.2 ASTM Standards:
num Alloys by Spark Atomic Emission Spectrometry
B193 Test Method for Resistivity of Electrical Conductor
2.3 ANSI Standards:
Materials
H35.1/H35.1(M) Alloy and Temper Designation Systems for
B317/B317M Specification for Aluminum-Alloy Extruded
Aluminum
Bar, Rod, Tube, Pipe, Structural Profiles, and Profiles for
H35.2 Dimensional Tolerances for Aluminum Mill Products
Electrical Purposes (Bus Conductor)
2.4 Military Standard:Available from Standardization
B557 Test Methods for Tension Testing Wrought and Cast
Documents Order Desk, DODSSP, Bldg. 4, Section D, 700
Aluminum- and Magnesium-Alloy Products
Robbins Ave., Philadelphia, PA 19111-5098, http://
B660 Practices for Packaging/Packing of Aluminum and
www.dodssp.daps.mil.
Magnesium Products
MIL-STD-129 Marking for Shipment and Storage
2.5 Federal Standard:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
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. Terminology
Aluminum Alloy Wrought Products.
Current edition approved Oct. 1, 2015. Published October 2015. Originally
3.1 Definitions: Refer to Terminology B881 for definitions
approved in 1948. Last previous edition approved in 2007 as B236 – 07. DOI:
of product terms used in this specification.
10.1520/B0236-07R15.
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
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B236 − 07 (2015)
A,B
TABLE 1 Tensile Property Limits
requirements specified herein. Except as otherwise specified in
Tensile Yield Strength
the contract or order, the producer may use his own or any
Specified
Temper Strength, (0.2 % offset),
Thickness, in. other suitable facilities for the performance of the inspection
min, ksi min, ksi
and test requirements specified herein, unless disapproved by
H12 0.125–1.000 12.0 8.0
the purchaser. The purchaser shall have the right to perform
H112 0.125–0.499 11.0 6.0
0.500–1.000 10.0 4.0
any of the inspections and tests set forth in this specification
1.001–3.000 9.0 3.5
where such inspections are deemed necessary to assure that
H111 All 8.5 3.5
material conforms to prescribed requirements.
A
For purposes of determining conformance with this specification, each value for
tensile strength and yield strength shall be rounded to the nearest 0.1 ksi in
6.2 Lot Definition—An inspection lot shall consist of an
accordance with the rounding method of Practice E29.
identifiable quantity of material of the same aluminum
B
See Annex A1.
designation, temper, and thickness subjected to inspection at
one time.
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:
4.1.1 This specification designation (which includes the
NOTE 3—It is standard practice in the United States aluminum industry
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
by the purchaser’s representative is required prior to material
shipment (16.1),
A
TABLE 2 Chemical Composition Limits
4.2.2 Whether marking for identification is required (18.1),
Element Composition, %
4.2.3 Whether Practices B660 applies and, if so, the levels
Silicon, max 0.10
of preservation, packaging, and packing required (19.3), and
Iron, max 0.40
Copper, max 0.05
4.2.4 Whether certification of the material by the producer is
Manganese, max 0.01
required (Section 20).
Chromium, max 0.01
Zinc, max 0.05
5. Manufacture
Boron, max 0.05
Gallium, max 0.03
5.1 The products covered by this specification shall be
Vanadium + titanium, total, max 0.02
B
produced by extruding or rolling, at the option of the producer, Other elements, each, max 0.03
B,C
Other elements, total, max 0.10
provided that the production method results in material that
D
Aluminum, min 99.50
meets all requirements of this specification.
A
Analysis shall be made for the elements for which limits are shown in this table.
B
Others includes all unlisted metallic elements. The producer may analyze
5.2 Bars in the H12 temper shall be furnished with a rolled
samples for trace elements not specified in the specification. However, such
mill finish; bars in the H111 temper, with an as-extruded mill
analysis is not required and may not cover all metallic Others elements. Should
finish; and bars in the H112 temper, with a rolled mill finish
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
except that the edges shall be as sawed.
exceeds the limit of Total, the material shall be considered non-conforming.
C
Other Elements—Total shall be the sum of unspecified metallic elements 0.010 %
6. Responsibility for Quality Assurance
or more, rounded to the second decimal before determining the sum.
D
The aluminum content shall be calculated by subtracting from 100.00 % the sum
6.1 Responsibility for Inspection and Tests—Unless other-
of all metallic elements present in amounts of 0.010 % or more each, rounded to
wise specified in the contract or purchase order, the producer is
the second decimal before determining the sum.
responsible for the performance of all inspection and test
B236 − 07 (2015)
TABLE 3 Edgewise Bend Radii
lb, or fraction thereof, in the shipment, except that not more
than one sample shall be required per piece. Specified Width, in. Mandrel Radius, in.
0.500 and under ⁄2
7.3 Methods of Sampling—Samples for determination of
0.501–1.000 1
chemical composition shall be taken in accordance with one of
1.001–1.500 1 ⁄2
1.501–2.000 2
the following methods:
2.001–2.500 2 ⁄2
7.3.1 Samples for chemical analysis shall be taken from the
2.501–3.000 3
material by drilling, sawing, milling, turning, or clipping a 3.001–3.500 3 ⁄2
3.501–4.000 4
representative piece or pieces to obtain a prepared sample of
not less than 75 g. Sampling shall be in accordance with
Practice E55.
7.3.2 Sampling for spectrochemical analysis shall be in
accordance with Practices E716. Samples for other methods of
(thckness) dimension of the bar. This is also a longitudinal
analysis shall be taken by methods suitable for the form of
bend as defined and shown in Test Methods E290, Fig. 1.
material being analyzed and the type of analytical method
9.2 Test Specimens—Bend test specimens shall be a full
used.
section of the material.
7.4 Methods of Analysis—The determination of chemical
9.3 Test Methods—Bend tests shall be made in accordance
composition shall be made in accordance with suitable chemi-
with Test Methods E290.
cal (Test Methods E34) or spectrochemical (Test Methods
E607 and E1251) methods. Other methods may be used only
10. Density
when no published ASTM method is available. In case of
10.1 The density of aluminum 1350 shall be taken as 0.097
dispute, the methods of analysis shall be agreed upon between
lb/in.
the producer and purchaser.
11. Electrical Properties
8. Tensile Properties
11.1 Limits—The resistivity of specimens selected shall not
8.1 Limits—The bars shall conform to the requirements for
exceed 0.0283 Ω·mm /m at 20°C corresponding to a conduc-
tensile properties as specified in Table 1.
tivity not less than 61.0 % of the International Annealed
8.2 Number of Specimens—One tension test specimen shall
Copper Standard. To determine conformance with this
be taken from a random bar representing each 3000 lb of bar,
specification, each value for electrical resistivity shall be
or fraction thereof, of the same temper, thickness, and width in
rounded to the nearest unit in the last right-hand place of
the shipment.
figures, in accordance with the rounding method of Practice
E29.
8.3 Test Methods—The tension test shall be made in accor-
dance with Test Methods B557.
11.2 Number of Specimens—One specimen shall be taken
from a random bar representing each 3000 lb of bar, or fraction
9. Bend Properties
thereof, of the same temper and thickness in the inspection lot.
9.1 Limits:
11.3 Test Specimens—Specimens for determining resistivity
9.1.1 Flatwise Bend—Bars in the H12, and H111, and H112
or conductivity shall preferably be a full section of the
tempers shall be capable of being bent flatwise at room
material, but may be of any suitable size or shape appropriate
temperature, through an angle of 90° around a pin or mandrel
to the instrument used in making the determination.
having a radius equal to the thickness of the specimen, without
11.4 Test Methods—Electrical resistivity or conductivity
cracking or evidence of slivers or other imperfections. For a
shall be determined in accordance with Test Methods B193 or
flatwise bend, the pin or mandrel shall be 90° from the working
E1004, provided that, in case of dispute, the results secured by
(extrusion or rolling) direction, and across the greater (width)
Test Method B193 shall be the basis for acceptance.
dimension of the bar. The required 90° bend shall be in the
working (extrusion or rolling) direction. This is a longitudinal
12. Edge Contours
bend as defined and shown in Test Methods E290, Fig. 1.
12.1 Unless otherwise specified, bar shall be furnished with
9.1.2 Edgewise Bend—Bars in the H12 and H111 tempers
square corners. When specified, bar shall be furnished with
whose width-to-thickness ratios are not in excess of 12 and
rounded corners, rounded edges or full rounded edges, as
whose width is 4 in. or less, shall be capable of being bent at
shown in Table 19.1.11 for rolled bar and Table 19.3.4 for
room temperature edgewise 90° around a mandrel having the
extruded bar or with corners and edges for sawed-plate bar as
radius shown in Table 3 without cracking or localized thinning
shown in Table 19.2.4, of ANSI H35.2.
to less than 90 % of the maximum thickness within the central
60° of the bend when measured along the outer edge of the
13. Dimensional Tolerances
bend. Bending requirements for bar w
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: B236 − 07 B236 − 07 (Reapproved 2015)
Standard Specification for
Aluminum Bars for Electrical Purposes (Bus Bars)
This standard is issued under the fixed designation B236; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. 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/H35.1(M). The equivalent Unified Numbering
System designation is A91350 in accordance with Practice E527.
NOTE 1—For Alloy 6101 bus conductors, refer to Specification B317/B317M.
NOTE 2—Prior to 1975, Aluminum 1350 was designated as EC aluminum.
1.3 A complete metric companion to Specification B236 has been developed—B236M; 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.
2. Referenced Documents
2.1 The following documents of the issue in effect on date of order acceptance form a part of this specification to the extent
referenced herein:
2.2 ASTM Standards:
B193 Test Method for Resistivity of Electrical Conductor Materials
B317/B317M Specification for Aluminum-Alloy Extruded Bar, Rod, Tube, Pipe, Structural Profiles, and Profiles for Electrical
Purposes (Bus Conductor)
B557 Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
B660 Practices for Packaging/Packing of Aluminum and Magnesium Products
B666/B666M Practice for Identification Marking of Aluminum and Magnesium Products
B881 Terminology Relating to Aluminum- and Magnesium-Alloy Products
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E34 Test Methods for Chemical Analysis of Aluminum and Aluminum-Base Alloys
E55 Practice for Sampling Wrought Nonferrous Metals and Alloys for Determination of Chemical Composition
E290 Test Methods for Bend Testing of Material for Ductility
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E607 Test Method for Atomic Emission Spectrometric Analysis Aluminum Alloys by the Point to Plane Technique Nitrogen
Atmosphere (Withdrawn 2011)
E716 Practices for Sampling and Sample Preparation of Aluminum and Aluminum Alloys for Determination of Chemical
Composition by Spectrochemical Analysis
E1004 Test Method for Determining Electrical Conductivity Using the Electromagnetic (Eddy-Current) Method
E1251 Test Method for Analysis of Aluminum and Aluminum Alloys by Spark Atomic Emission Spectrometry
2.3 ANSI Standards:
H35.1/H35.1(M) Alloy and Temper Designation Systems for Aluminum
H35.2 Dimensional Tolerances for Aluminum Mill Products
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 Aluminum
Alloy Wrought Products.
Current edition approved June 1, 2007Oct. 1, 2015. Published July 2007October 2015. Originally approved in 1948. Last previous edition approved in 20062007 as
B236B236 – 07.–00 (2006). DOI: 10.1520/B0236-07.10.1520/B0236-07R15.
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
The last approved version of this historical standard is referenced on www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B236 − 07 (2015)
A,B
TABLE 1 Tensile Property Limits
Tensile Yield Strength
Specified
Temper Strength, (0.2 % offset),
Thickness, in.
min, ksi min, ksi
H12 0.125–1.000 12.0 8.0
H112 0.125–0.499 11.0 6.0
0.500–1.000 10.0 4.0
1.001–3.000 9.0 3.5
H111 All 8.5 3.5
A
For purposes of determining conformance with this specification, each value for
tensile strength and yield strength shall be rounded to the nearest 0.1 ksi in
accordance with the rounding method of Practice E29.
B
See Annex A1.
2.4 Military Standard:Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave.,
Philadelphia, PA 19111-5098, http://www.dodssp.daps.mil.
MIL-STD-129 Marking for Shipment and Storage
2.5 Federal Standard:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
3. Terminology
3.1 Definitions: Refer to Terminology B881 for definitions of product terms used in this specification.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 capable of—the term capable of as used in this specification means that the test need not be performed by the producer
of the material. However, should testing by the purchaser establish that the material does not meet these requirements, the material
shall be subject to rejection.
4. Ordering Information
4.1 Orders for material to this specification shall include the following information:
4.1.1 This specification designation (which includes the number, 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 (Section 12),
4.1.5 Diameter for rounds; distance across flats for square-cornered squares, hexagons, or octagons; width and depth for
square-cornered rectangles,
4.1.6 Length (specific or stock) (Section 14),
4.2 Additionally, orders for material to this specification shall include the following information when required by the
purchaser:
4.2.1 Whether inspection or witness of inspection and tests by the purchaser’s representative is required prior to material
shipment (16.1),
4.2.2 Whether marking for identification is required (18.1),
4.2.3 Whether Practices B660 applies and, if so, the levels of preservation, packaging, and packing required (19.3), and
4.2.4 Whether certification of the material by the producer is required (Section 20).
5. Manufacture
5.1 The products covered by this specification shall be produced by extruding or rolling, at the option of the producer, provided
that the production method results in material that meets all requirements of this specification.
5.2 Bars in the H12 temper shall be furnished with a rolled mill finish; bars in the H111 temper, with an as-extruded mill finish;
and bars in the H112 temper, with a rolled mill finish except that the edges shall be as sawed.
6. Responsibility for Quality Assurance
6.1 Responsibility for Inspection and Tests—Unless otherwise specified in the contract or purchase order, the producer is
responsible for the performance of all inspection and test requirements specified herein. Except as otherwise specified in the
contract or order, the producer may use his own or any other suitable facilities for the performance of the inspection and test
requirements specified herein, unless disapproved by the purchaser. The purchaser shall have the right to perform any of the
inspections and tests set forth in this specification where such inspections are deemed necessary to assure that material conforms
to prescribed requirements.
B236 − 07 (2015)
6.2 Lot Definition—An inspection lot shall consist of an identifiable quantity of material of the same aluminum designation,
temper, and thickness subjected to inspection at one time.
7. Chemical Composition Requirements
7.1 The material shall conform to the composition in Table 2. Conformance shall be determined by the producer by analyzing
samples taken at the time the ingots or continuously cast bars are poured, or samples taken from the finished or semifinished
product. If the producer has determined the composition of the material during the course of manufacture, he shall not be required
to sample and analyze the finished product.
NOTE 3—It is standard practice in the United States aluminum industry to determine conformance to the composition limits prior to further processing
of ingots into wrought products. Due to the continuous nature of the process, it is not practical to keep a specific ingot analysis identified with a specific
quantity of finished material.
7.2 Number of Samples—The number of samples taken for determination of chemical composition shall be as follows:
7.2.1 When samples are taken at the time the ingots are poured, at least one sample shall be taken for each group of ingots
poured simultaneously from the same source of molten metal.
7.2.2 When samples are taken from the finished or semifinished product, a sample shall be taken to represent each 4000 lb, or
fraction thereof, in the shipment, except that not more than one sample shall be required per piece.
7.3 Methods of Sampling—Samples for determination of chemical composition shall be taken in accordance with one of the
following methods:
7.3.1 Samples for chemical analysis shall be taken from the material by drilling, sawing, milling, turning, or clipping a
representative piece or pieces to obtain a prepared sample of not less than 75 g. Sampling shall be in accordance with Practice E55.
7.3.2 Sampling for spectrochemical analysis shall be in accordance with Practices E716. Samples for other methods of analysis
shall be taken by methods suitable for the form of material being analyzed and the type of analytical method used.
7.4 Methods of Analysis—The determination of chemical composition shall be made in accordance with suitable chemical (Test
Methods E34) or spectrochemical (Test Methods E607 and E1251) methods. Other methods may be used only when no published
ASTM method is available. In case of dispute, the methods of analysis shall be agreed upon between the producer and purchaser.
8. Tensile Properties
8.1 Limits—The bars shall conform to the requirements for tensile properties as specified in Table 1.
8.2 Number of Specimens—One tension test specimen shall be taken from a random bar representing each 3000 lb of bar, or
fraction thereof, of the same temper, thickness, and width in the shipment.
8.3 Test Methods—The tension test shall be made in accordance with Test Methods B557.
9. Bend Properties
9.1 Limits:
A
TABLE 2 Chemical Composition Limits
Element Composition, %
Silicon, max 0.10
Iron, max 0.40
Copper, max 0.05
Manganese, max 0.01
Chromium, max 0.01
Zinc, max 0.05
Boron, max 0.05
Gallium, max 0.03
Vanadium + titanium, total, max 0.02
B
Other elements, each, max 0.03
B,C
Other elements, total, max 0.10
D
Aluminum, min 99.50
A
Analysis shall be made for the elements for which limits are shown in this table.
B
Others includes all unlisted metallic elements. The producer may analyze
samples for trace elements not specified in the specification. However, such
analysis is not required and may not cover all metallic Others elements. Should
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
exceeds the limit of Total, the material shall be considered non-conforming.
C
Other Elements—Total shall be the sum of unspecified metallic elements 0.010 %
or more, rounded to the second decimal before determining the sum.
D
The aluminum content shall be calculated by subtracting from 100.00 % the sum
of all metallic elements present in amounts of 0.010 % or more each, rounded to
the second decimal before determining the sum.
B236 − 07 (2015)
9.1.1 Flatwise Bend—Bars in the H12, and H111, and H112 tempers shall be capable of being bent flatwise at room temperature,
through an angle of 90° around a pin or mandrel having a radius equal to the thickness of the specimen, without cracking or
evidence of slivers or other imperfections. For a flatwise bend, the pin or mandrel 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 the working (extrusion
or rolling) direction. This is a longitudinal bend as defined and shown in Test Methods E290, Fig. 1.
9.1.2 Edgewise Bend—Bars in the H12 and H111 tempers whose width-to-thickness ratios are not in excess of 12 and whose
width is 4 in. or less, shall be capable of being bent at room temperature edgewise 90° around a mandrel having the radius shown
in Table 3 without cracking or localized thinning to less than 90 % of the maximum thickness within the central 60° of the bend
when measured along the outer edge of the bend. Bending requirements for bar wider than 4 in. shall be as agreed upon by the
producer and the purchaser. For an edgewise bend, the pin or mandrel shall be 90° from the working (extrusion or rolling) direction,
and across the lesser (thckness) dimension of the bar. This is also a longitudinal bend as defined and shown in Test Methods E290,
Fig. 1.
9.2 Test Specimens—Bend test specimens shall be a full section of the material.
9.3 Test Methods—Bend tests shall be made in accordance with Test Methods E290.
10. Density
10.1 The density of aluminum 1350 shall be taken as 0.097 lb/in.
11. Electrical Properties
11.1 Limits—The resistivity of specimens selected shall not exceed 0.0283 Ω·mm /m at 20°C corresponding to a conductivity
not less than 61.0 % of the International Annealed Copper Standard. To determine conformance with this specification, each value
for electrical resistivity shall be rounded to the nearest unit in the last right-hand place of figures, in accordance with the rounding
method of Practice E29.
11.2 Number of Specimens—One specimen shall be taken from a random bar representing each 3000 lb of bar, or fraction
thereof, of the same temper and thickness in the inspection lot.
11.3 Test Specimens—Specimens for determining resistivity or conductivity shall preferably be a full section of the material, but
may be of any suitable size or shape appropriate to the instrument used in making the determination.
11.4 Test Methods—Electrical resistivity or conductivity shall be determined in accordance with Test Methods B193 or E1004,
provided that, in case of dispute, the results secured by Test Method B193 shall be the basis for acceptance.
12. Edge Contours
12.1 Unless otherwise specified,
...
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