ASTM B928/B928M-15(2023)
(Specification)Standard Specification for High Magnesium Aluminum-Alloy Products for Marine Service and Similar Environments
Standard Specification for High Magnesium Aluminum-Alloy Products for Marine Service and Similar Environments
ABSTRACT
This specification covers high magnesium marine application aluminum-alloy in those alloy tempers for flat sheet, coiled sheet, and plate, in the mill finish that are intended for marine and similar environments. An inspection lot shall consist of an identifiable quantity of material of the same mill form, alloy, temper, cast or melt lot, and thickness, subjected to inspection at one time. The material shall be supplied in the mill finish and shall be uniform as defined by the requirements of this specification and shall be commercially sound. Each coil, sheet and plate shall be examined to determine conformance to this specification with respect to general quality and identification marking. One sample shall be taken from each end of each parent coil, or parent plate. Alloy-tempers are manufactured and corrosion tested for intended use in marine hull construction or in marine applications where frequent or constant direct contact with seawater is expected. The specimen shall be capable of exhibiting resistance to intergranular corrosion as indicated by an acceptable mass-loss when tested and shall also be capable of exhibiting no evidence of exfoliation or corrosion. Under metallographic examination, the microstructure of a sample from each production lot shall be compared to that of the producer-established reference photomicrograph of acceptable material, in the same thickness range. Each shipping container shall be marked with the purchase order number, material size, specification number, alloy and temper, gross and net weights, and the producer's name or trademark.
SCOPE
1.1 This specification covers high magnesium aluminum-alloy products in the mill finish condition that are intended for marine hull construction and other marine applications where frequent or constant direct contact with seawater is expected and for similar environments (Note 1). Aluminum alloy products covered by this specification include the alloy-tempers of flat sheet, coiled sheet, and plate shown in Table 2 [Table 3] and Table 4 [Table 5], and alloy-tempers of extruded profiles shown in Table 6 [Table 7].
Note 1: There are other aluminum alloy-temper products that may be suitable for use in marine and similar environments, but which may not require the corrosion resistance testing specified by B928/B928M. See Specification B209 or B209M for other aluminum sheet and plate alloy-temper products. For other aluminum extruded alloy-temper products see Specification B221 or B221M and/or other relevant specifications for aluminum extruded products.
1.2 Alloy and temper designations are in accordance with ANSI H35.1/H35.1 (M). The equivalent Unified Numbering System alloy designations are those of Table 1 preceded by A9, for example, A95083 for 5083 in accordance with Practice E527.
1.3 The values stated in either SI units (Table 3 and Table 5) or inch-pound units (Table 2 and Table 4) are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of each other. Combining values from the two systems may result in non-conformance with the standard.
1.4 For acceptance criteria for inclusion of new aluminum and aluminum alloys in this specification, see Annex A2.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 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.
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Designation: B928/B928M − 15 (Reapproved 2023)
Standard Specification for
High Magnesium Aluminum-Alloy Products for Marine
Service and Similar Environments
This standard is issued under the fixed designation B928/B928M; 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.
1. Scope 1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This specification covers high magnesium aluminum-
ization established in the Decision on Principles for the
alloy products in the mill finish condition that are intended for
Development of International Standards, Guides and Recom-
marine hull construction and other marine applications where
mendations issued by the World Trade Organization Technical
frequent or constant direct contact with seawater is expected
Barriers to Trade (TBT) Committee.
and for similar environments (Note 1). Aluminum alloy prod-
ucts covered by this specification include the alloy-tempers of
2. Referenced Documents
flat sheet, coiled sheet, and plate shown in Table 2 [Table 3]
2.1 The following documents of the issue in effect on the
and Table 4 [Table 5], and alloy-tempers of extruded profiles
shown in Table 6 [Table 7]. date of material purchase, unless otherwise noted, form a part
NOTE 1—There are other aluminum alloy-temper products that may be of this specification to the extent referenced herein:
suitable for use in marine and similar environments, but which may not
2.2 ASTM Standards:
require the corrosion resistance testing specified by B928/B928M. See
B209 Specification for Aluminum and Aluminum-Alloy
Specification B209 or B209M for other aluminum sheet and plate
alloy-temper products. For other aluminum extruded alloy-temper prod-
Sheet and Plate (Metric) B0209_B0209M
ucts see Specification B221 or B221M and/or other relevant specifications
B209M Specification for Aluminum and Aluminum-Alloy
for aluminum extruded products.
Sheet and Plate (Metric) (Withdrawn 2021)
1.2 Alloy and temper designations are in accordance with
B221 Specification for Aluminum and Aluminum-Alloy Ex-
ANSI H35.1/H35.1 (M). The equivalent Unified Numbering
truded Bars, Rods, Wire, Profiles, and Tubes
System alloy designations are those of Table 1 preceded by A9,
B221M Specification for Aluminum and Aluminum-Alloy
for example, A95083 for 5083 in accordance with Practice
Extruded Bars, Rods, Wire, Profiles, and Tubes (Metric)
E527.
B557 Test Methods for Tension Testing Wrought and Cast
Aluminum- and Magnesium-Alloy Products
1.3 The values stated in either SI units (Table 3 and Table 5)
B557M Test Methods for Tension Testing Wrought and Cast
or inch-pound units (Table 2 and Table 4) are to be regarded
Aluminum- and Magnesium-Alloy Products (Metric)
separately as standard. The values stated in each system may
B660 Practices for Packaging/Packing of Aluminum and
not be exact equivalents; therefore, each system shall be used
Magnesium Products
independently of each other. Combining values from the two
B666/B666M Practice for Identification Marking of Alumi-
systems may result in non-conformance with the standard.
num and Magnesium Products
1.4 For acceptance criteria for inclusion of new aluminum
B881 Terminology Relating to Aluminum- and Magnesium-
and aluminum alloys in this specification, see Annex A2.
Alloy Products
1.5 This standard does not purport to address all of the
B985 Practice for Sampling Aluminum Ingots, Billets, Cast-
safety concerns, if any, associated with its use. It is the
ings and Finished or Semi-Finished Wrought Aluminum
responsibility of the user of this standard to establish appro-
Products for Compositional Analysis
priate safety, health, and environmental practices and deter-
E29 Practice for Using Significant Digits in Test Data to
mine the applicability of regulatory limitations prior to use.
Determine Conformance with Specifications
1 2
This specification is under the jurisdiction of ASTM Committee B07 on Light For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Metals and Alloys and is the direct responsibility of Subcommittee B07.03 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Aluminum Alloy Wrought Products. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Oct. 1, 2023. Published October 2023. Originally the ASTM website.
approved in 2003. Last previous edition approved in 2015 as B928/B928M – 15. The last approved version of this historical standard is referenced on
DOI: 10.1520/B0928_B0928M-15R23. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B928/B928M − 15 (2023)
E34 Test Methods for Chemical Analysis of Aluminum and 3.2.5 sensitization, n—the development of a continuous or
Aluminum-Base Alloys (Withdrawn 2017) nearly continuous grain boundary precipitate in 5xxx alloy-
E50 Practices for Apparatus, Reagents, and Safety Consid- temper material, that causes the material to be susceptible to
erations for Chemical Analysis of Metals, Ores, and intergranular forms of corrosion.
Related Materials
3.2.6 stress-corrosion cracking, n—a cracking process that
E527 Practice for Numbering Metals and Alloys in the
requires the simultaneous action of a corrodent, and sustained
Unified Numbering System (UNS)
tensile stress. (This excludes corrosion-reduced sections, which
E607 Test Method for Atomic Emission Spectrometric
fail by fast fracture. It also excludes intercrystalline or tran-
Analysis Aluminum Alloys by the Point to Plane Tech-
scrystalline corrosion which can disintegrate an alloy without
nique Nitrogen Atmosphere (Withdrawn 2011)
either applied or residual stress.)
E716 Practices for Sampling and Sample Preparation of
Aluminum and Aluminum Alloys for Determination of
4. Ordering Information
Chemical Composition by Spark Atomic Emission Spec-
4.1 Orders for material to this specification shall include the
trometry
following information:
E1251 Test Method for Analysis of Aluminum and Alumi-
num Alloys by Spark Atomic Emission Spectrometry 4.1.1 This specification designation (which includes the
G66 Test Method for Visual Assessment of Exfoliation
number, the year, and the revision letter, if applicable),
Corrosion Susceptibility of 5XXX Series Aluminum Al-
4.1.2 Quantity in pieces or pounds [kilograms],
loys (ASSET Test)
4.1.3 Alloy (see 7.1 and Table 1),
G67 Test Method for Determining the Susceptibility to
4.1.4 Temper (see 8.1 and Table 2 [Table 3] and Table 4
Intergranular Corrosion of 5XXX Series Aluminum Al-
[Table 5] for sheet and plate or Table 6 [Table 7] for
loys by Mass Loss After Exposure to Nitric Acid (NAMLT
extrusions),
Test)
4.1.5 For sheet, whether flat or coiled, and
2.3 ANSI Standards:
4.1.6 For sheet and plate, dimensions (thickness, width, and
H35.1/H35.1 (M) Alloy and Temper Designation Systems
length or coil size).
for Aluminum
4.1.7 For extruded products, dimensions and tolerances
H35.2 Dimensional Tolerances for Aluminum Mill Products
including but not limited to the following:
H35.2(M) Dimensional Tolerances for Aluminum Mill Prod-
4.1.7.1 For rod and round wire—diameter.
ucts
4.1.7.2 For square cornered bar and wire—width and depth.
2.4 Other Standards:
4.1.7.3 For sharp cornered hexagonal or octagonal bar and
CEN EN 14242 Aluminum and Aluminum Alloys—
wire—distance across the flats.
Chemical Analysis—Inductively Coupled Plasma Optical
4.1.7.4 For round tube—outside or inside diameter and wall
Emission Spectral Analysis
thickness.
3. Terminology
4.1.7.5 For square or sharp cornered tube other than
round—distance across flats and wall thickness.
3.1 Definitions—Refer to Terminology B881 for definitions
4.1.7.6 For round cornered bars, profiles, tube other than
of product terms used in this specification.
round, square, rectangular, hexagonal, or octagonal with sharp
3.2 Definitions of Terms Specific to This Standard:
corners a drawing is required showing all dimensions and
3.2.1 exfoliation, n—corrosion that proceeds laterally from
tolerances relevant for the manufacture of the product to
the sites of initiation along planes parallel to the original rolling
requirements.
surface, generally at grain boundaries, forming corrosion
4.1.7.7 Length.
products that force metal away from the body of the material,
giving rise to a layered appearance.
4.2 Additionally, orders for material to this specification
shall include the following information when required by the
3.2.2 high magnesium aluminum alloys, n—in the general
purchaser:
sense, includes those 5xxx alloys containing 3 % or more
nominal magnesium.
4.2.1 Whether inspection or witness of inspection and tests
by the purchaser’s representative is required prior to material
3.2.3 intergranular corrosion, n—corrosion that preferen-
shipment (see 12.1),
tially occurs at, or adjacent to, the grain boundaries of a metal
4.2.2 Whether Practices B660 applies and, if so, the levels
or alloy.
of preservation, packaging, and packing required (see 16.3),
3.2.4 lot, n—an inspection lot shall consist of an identifiable
4.2.3 Whether certification is required (see Section 14),
quantity of material of the same mill form, alloy, temper, cast
4.2.4 Whether G66 and G67 testing is the required lot
or melt lot, and thickness, subjected to inspection at one time.
release method for the H116 and H321 tempers (see 9.5),
4.2.5 Whether the G66 and G67 test results are to be
Available from Aluminum Association, Inc., 1400 Crystal Dr., Suite 430,
included in the certification (see Section 14), and
Arlington, VA, 22202, http://www.aluminum.org.
5 4.2.6 Whether tensile testing should be in the longitudinal
Available from European Committee for Standardization (CEN), Avenue
Marnix 17, B-1000 Brussels, http://www.cenorm.be. or long transverse direction (see 8.1.5).
B928/B928M − 15 (2023)
5. Responsibility for Quality Assurance 7.2 If it becomes necessary to analyze the finished or
semifinished product for conformance to chemical composition
5.1 Responsibility for Inspection and Tests—Unless other-
limits, the methods of sampling and methods of analysis shall
wise specified in the contract or purchase order, the producer is
be as provided in the following:
responsible for the performance of all inspection and test
7.2.1 Methods of Sampling—Samples for chemical analysis
requirements specified herein. Producers may use their own or
shall be taken in accordance with Practice B985.
any other suitable facilities for the performance of the inspec-
7.2.2 Methods of Analysis—Analysis shall be performed in
tion and test requirements specified herein, unless disapproved
accordance with Test Methods E607, E1251, or E34, or CEN
by the purchaser in the order or at the time of contract signing.
EN 14242 (ICP method).
The purchaser shall have the right to perform any of the
inspections and tests set forth in this specification where such
8. Tensile Properties of Material as Supplied
inspections are deemed necessary to ensure that material
8.1 Tensile Properties for Sheet and Plate Products:
conforms to prescribed requirements.
8.1.1 Limits—The sheet and plate shall conform to the
6. General Quality requirements for tensile properties as specified in Table 2
[Table 3] or Table 4 [Table 5]. Table 2 [Table 3] includes
6.1 Unless otherwise specified, the material shall be sup-
specification limits for tensile properties in the longitudinal
plied in the mill finish, shall be uniform as defined by the
direction. Table 4 [Table 5] includes specification limits for
requirements of this specification and shall be commercially
tensile properties in the long transverse direction.
sound. Any requirement not so covered is subject to negotia-
8.1.1.1 Tensile property limits for sizes not covered in Table
tion between producer and purchaser.
2 [Table 3] or Table 4 [Table 5] shall be as agreed upon
6.2 Each coil, sheet and plate, or extrusion lot shall be
between the producer and purchaser and shall be so specified in
examined to determine conformance to this specification with
the contract or purchase order.
respect to general quality and identification marking. On
8.1.2 Number of Samples—One sample shall be taken from
approval of the purchaser, however, the producer may use a
each end of each parent coil, or parent plate, but no more than
system of statistical quality control for such examinations.
one sample per 2000 lb [1000 kg] of sheet or 4000 lb [2000 kg]
of plate, or part thereof, in a lot shall be required. Other
7. Chemical Composition
procedures for selecting samples may be employed if agreed
7.1 Limits—The sheet and plate shall conform to the chemi- upon between the producer and purchaser.
8.1.3 Test Specimens—Geometry of test specimens and the
cal composition limits specified in Table 1. Conformance shall
be determined by the producer, by taking samples in accor- location in the product from which they are taken shall be as
specified in Test Methods B557 or B557M, with the exception
dance with Practices E716 when the ingots are poured and
analyzing those samples in accordance with Test Methods that the test direction will be as specified in 8.1.5.
E607, E1251, E34 or EN 14242. At least one sample shall be 8.1.4 Test Methods—The tension test shall be made in
taken for each group of ingots poured simultaneously from the accordance with Test Methods B557 or B557M.
same source of molten metal. If the producer has determined 8.1.5 Testing Direction—Tensile testing shall be in the
the chemical composition during pouring of the ingots, they longitudinal direction unless the long transverse direction is
shall not be required to sample and analyze the finished specified in the contract or purchase order. Tensile testing
product. direction shall be noted on all documentation.
A,B,C,H
TABLE 1 Chemical Composition Limits
D
Other Elements
Alloy Silicon Iron Copper Manganese Magnesium Chromium Zinc Titanium Aluminum
E
Each Total
F
5059 0.45 0.50 0.25 0.6 to 1.2 5.0 to 6.0 0.25 0.40 to 0.9 0.20 0.05 0.15 remainder
5083 0.40 0.40 0.10 0.40 to 1.0 4.0 to 4.9 0.05 to 0.25 0.25 0.15 0.05 0.15 remainder
5086 0.40 0.50 0.10 0.20 to 0.7 3.5 to 4.5 0.05 to 0.25 0.25 0.15 0.05 0.15 remainder
G
5383 0.25 0.25 0.20 0.7 to 1.0 4.0 to 5.2 0.25 0.40 0.15 0.05 0.15 remainder
5456 0.25 0.40 0.10 0.50 to 1.0 4.7 to 5.5 0.05 to 0.20 0.25 0.20 0.05 0.15 remainder
A
Limits are in weight percent maximum unless sho
...
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: B928/B928M − 15 B928/B928M − 15 (Reapproved 2023)
Standard Specification for
High Magnesium Aluminum-Alloy Products for Marine
Service and Similar Environments
This standard is issued under the fixed designation B928/B928M; 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.
1. Scope*Scope
1.1 This specification covers high magnesium aluminum-alloy products in the mill finish condition that are intended for marine
hull construction and other marine applications where frequent or constant direct contact with seawater is expected and for similar
environments (Note 1). Aluminum alloy products covered by this specification include the alloy-tempers of flat sheet, coiled sheet,
and plate shown in Table 2 [Table 3] and Table 4 [Table 5], and alloy-tempers of extruded profiles shown in Table 6 [Table 7].
NOTE 1—There are other aluminum alloy-temper products that may be suitable for use in marine and similar environments, but which may not require
the corrosion resistance testing specified by B928/B928M. See Specification B209 or B209M for other aluminum sheet and plate alloy-temper products.
For other aluminum extruded alloy-temper products see Specification B221 or B221M and/or other relevant specifications for aluminum extruded
products.
1.2 Alloy and temper designations are in accordance with ANSI H35.1/H35.1 (M). The equivalent Unified Numbering System
alloy designations are those of Table 1 preceded by A9, for example, A95083 for 5083 in accordance with Practice E527.
1.3 The values stated in either SI units (Table 3 and Table 5) or inch-pound units (Table 2 and Table 4) are to be regarded separately
as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently
of each other. Combining values from the two systems may result in non-conformance with the standard.
1.4 For acceptance criteria for inclusion of new aluminum and aluminum alloys in this specification, see Annex A2.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.6 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.
2. Referenced Documents
2.1 The following documents of the issue in effect on the date of material purchase, unless otherwise noted, form a part of this
specification to the extent referenced herein:
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 15, 2015Oct. 1, 2023. Published July 2015October 2023. Originally approved in 2003. Last previous edition approved in 20142015 as
B928/B928M – 14a.B928/B928M – 15. DOI: 10.1520/B0928_B0928M-15. 10.1520/B0928_B0928M-15R23.
*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
B928/B928M − 15 (2023)
2.2 ASTM Standards:
B209 Specification for Aluminum and Aluminum-Alloy Sheet and Plate (Metric) B0209_B0209M
B209M Specification for Aluminum and Aluminum-Alloy Sheet and Plate (Metric) (Withdrawn 2021)
B221 Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes
B221M Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes (Metric)
B557 Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
B557M Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products (Metric)
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
B985 Practice for Sampling Aluminum Ingots, Billets, Castings and Finished or Semi-Finished Wrought Aluminum Products for
Compositional Analysis
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 (Withdrawn 2017)
E50 Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials
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 Spark Atomic Emission Spectrometry
E1251 Test Method for Analysis of Aluminum and Aluminum Alloys by Spark Atomic Emission Spectrometry
G66 Test Method for Visual Assessment of Exfoliation Corrosion Susceptibility of 5XXX Series Aluminum Alloys (ASSET
Test)
G67 Test Method for Determining the Susceptibility to Intergranular Corrosion of 5XXX Series Aluminum Alloys by Mass Loss
After Exposure to Nitric Acid (NAMLT Test)
2.3 ANSI Standards:
H35.1/H35.1 (M) Alloy and Temper Designation Systems for Aluminum
H35.2 Dimensional Tolerances for Aluminum Mill Products
H35.2(M) Dimensional Tolerances for Aluminum Mill Products
2.4 Other Standards:
CEN EN 14242 Aluminum and Aluminum Alloys—Chemical Analysis—Inductively Coupled Plasma Optical Emission Spectral
Analysis
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 exfoliation, n—corrosion that proceeds laterally from the sites of initiation along planes parallel to the original rolling
surface, generally at grain boundaries, forming corrosion products that force metal away from the body of the material, giving rise
to a layered appearance.
3.2.2 high magnesium aluminum alloys, n—in the general sense, includes those 5xxx alloys containing 3 % or more nominal
magnesium.
3.2.3 intergranular corrosion, n—corrosion that preferentially occurs at, or adjacent to, the grain boundaries of a metal or alloy.
3.2.4 lot, n—an inspection lot shall consist of an identifiable quantity of material of the same mill form, alloy, temper, cast or melt
lot, and thickness, subjected to inspection at one time.
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.
Available from Aluminum Association, Inc., 1400 Crystal Dr., Suite 430, Arlington, VA, 22202, http://www.aluminum.org.
Available from European Committee for Standardization (CEN), Avenue Marnix 17, B-1000 Brussels, http://www.cenorm.be.
B928/B928M − 15 (2023)
3.2.5 sensitization, n—the development of a continuous or nearly continuous grain boundary precipitate in 5xxx alloy-temper
material, that causes the material to be susceptible to intergranular forms of corrosion.
3.2.6 stress-corrosion cracking, n—a cracking process that requires the simultaneous action of a corrodent, and sustained tensile
stress. (This excludes corrosion-reduced sections, which fail by fast fracture. It also excludes intercrystalline or transcrystalline
corrosion which can disintegrate an alloy without either applied or residual stress.)
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 [kilograms],
4.1.3 Alloy (see 7.1 and Table 1),
4.1.4 Temper (see 8.1 and Table 2 [Table 3] and Table 4 [Table 5] for sheet and plate or Table 6 [Table 7] for extrusions),
4.1.5 For sheet, whether flat or coiled, and
4.1.6 For sheet and plate, dimensions (thickness, width, and length or coil size).
4.1.7 For extruded products, dimensions and tolerances including but not limited to the following:
4.1.7.1 For rod and round wire—diameter.
4.1.7.2 For square cornered bar and wire—width and depth.
4.1.7.3 For sharp cornered hexagonal or octagonal bar and wire—distance across the flats.
4.1.7.4 For round tube—outside or inside diameter and wall thickness.
4.1.7.5 For square or sharp cornered tube other than round—distance across flats and wall thickness.
4.1.7.6 For round cornered bars, profiles, tube other than round, square, rectangular, hexagonal, or octagonal with sharp corners
a drawing is required showing all dimensions and tolerances relevant for the manufacture of the product to requirements.
4.1.7.7 Length.
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
(see 12.1),
4.2.2 Whether Practices B660 applies and, if so, the levels of preservation, packaging, and packing required (see 16.3),
4.2.3 Whether certification is required (see Section 14),
4.2.4 Whether G66 and G67 testing is the required lot release method for the H116 and H321 tempers (see 9.5),
4.2.5 Whether the G66 and G67 test results are to be included in the certification (see Section 14), and
4.2.6 Whether tensile testing should be in the longitudinal or long transverse direction (see 8.1.5).
B928/B928M − 15 (2023)
5. Responsibility for Quality Assurance
5.1 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. Producers may use their own or any other
suitable facilities for the performance of the inspection and test requirements specified herein, unless disapproved by the purchaser
in the order or at the time of contract signing. 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 ensure that material conforms to prescribed
requirements.
6. General Quality
6.1 Unless otherwise specified, the material shall be supplied in the mill finish, shall be uniform as defined by the requirements
of this specification and shall be commercially sound. Any requirement not so covered is subject to negotiation between producer
and purchaser.
6.2 Each coil, sheet and plate, or extrusion lot shall be examined to determine conformance to this specification with respect to
general quality and identification marking. On approval of the purchaser, however, the producer may use a system of statistical
quality control for such examinations.
7. Chemical Composition
7.1 Limits—The sheet and plate shall conform to the chemical composition limits specified in Table 1. Conformance shall be
determined by the producer, by taking samples in accordance with Practices E716 when the ingots are poured and analyzing those
samples in accordance with Test Methods E607, E1251, E34 or EN 14242. At least one sample shall be taken for each group of
ingots poured simultaneously from the same source of molten metal. If the producer has determined the chemical composition
during pouring of the ingots, they shall not be required to sample and analyze the finished product.
7.2 If it becomes necessary to analyze the finished or semifinished product for conformance to chemical composition limits, the
methods of sampling and methods of analysis shall be as provided in the following:
7.2.1 Methods of Sampling—Samples for chemical analysis shall be taken in accordance with Practice B985.
7.2.2 Methods of Analysis—Analysis shall be performed in accordance with Test Methods E607, E1251, or E34, or CEN EN 14242
(ICP method).
8. Tensile Properties of Material as Supplied
8.1 Tensile Properties for Sheet and Plate Products:
A,B,C,H
TABLE 1 Chemical Composition Limits
D
Other Elements
Alloy Silicon Iron Copper Manganese Magnesium Chromium Zinc Titanium Aluminum
E
Each Total
F
5059 0.45 0.50 0.25 0.6 to 1.2 5.0 to 6.0 0.25 0.40 to 0.9 0.20 0.05 0.15 remainder
5083 0.40 0.40 0.10 0.40 to 1.0 4.0 to 4.9 0.05 to 0.25 0.25 0.15 0.05 0.15 remainder
5086 0.40 0.50 0.10 0.20 to 0.7 3.5 to 4.5 0.05 to 0.25 0.25 0.15 0.05 0.15 remainder
G
5383 0.25 0.25 0.20 0.7 to 1.0 4.0 to 5.2 0.25 0.40 0.15 0.05 0.15 remainder
5456 0.25 0.40 0.10 0.50 to 1.0 4.7 to 5.5 0.05 to 0.20 0.25 0.20 0.05 0.15 remainder
A
Limits are in weight percent maximum unless shown as a range or stated otherwise.
B
Analysis shall be made for the elements for which limits are shown in this table.
C
For purposes of determining conformance to these limits, an observed value or a calculated value attained from analysis shall be rounded to the nearest unit in the last
right-hand place of figures used in expressing the specified limit, in accordance with the rounding-off method of Practice E29.
D
Others include listed elements for which no specific limit is shown, as well as unlisted metallic elements, but doesn’t include elements shown with composition limits in
the footnotes. 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 nonconforming.
E
Other Elements—Total shall be the sum of unsp
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