ASTM B928/B928M-09
(Specification)Standard Specification for High Magnesium Aluminum-Alloy Sheet and Plate for Marine Service and Similar Environments
Standard Specification for High Magnesium Aluminum-Alloy Sheet and Plate 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 (Note 1) marine application aluminum-alloy (Note 2), in those alloy-tempers shown in Table 1 [Table 2] and Table 3 [Table 4], for flat sheet, coiled sheet, and plate, in the mill finish that are intended for marine and similar environments:
Note 1—The term high magnesium in the general sense includes those alloys containing 3 % or more nominal magnesium.
Note 2—Throughout this specification use of the term alloy in the general sense includes aluminum as well as aluminum alloy.
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 5 preceded by A9, for example, A95083 for 5083 in accordance with Practice E527.
1.3 The values stated in either SI units (Table 2 and Table 4) or inch-pound units (Table 1 and Table 3) 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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:B928/B928M −09
StandardSpecification for
High Magnesium Aluminum-Alloy Sheet and Plate for Marine
1
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.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
2
1. Scope* 2.2 ASTM Standards:
B557Test Methods for Tension Testing Wrought and Cast
1.1 This specification covers high magnesium (Note 1)
Aluminum- and Magnesium-Alloy Products
marine application aluminum-alloy (Note 2), in those alloy-
B557MTest Methods forTensionTestingWrought and Cast
tempers shown in Table 2 [Table 3] and Table 4 [Table 5], for
Aluminum- and Magnesium-Alloy Products (Metric)
flat sheet, coiled sheet, and plate, in the mill finish that are
B660Practices for Packaging/Packing of Aluminum and
intended for marine and similar environments:
Magnesium Products
NOTE 1—The term high magnesium in the general sense includes those
B666/B666MPractice for Identification Marking of Alumi-
alloys containing 3% or more nominal magnesium.
num and Magnesium Products
NOTE 2—Throughout this specification use of the term alloy in the
B881Terminology Relating toAluminum- and Magnesium-
general sense includes aluminum as well as aluminum alloy.
Alloy Products
1.2 Alloy and temper designations are in accordance with
E3Guide for Preparation of Metallographic Specimens
ANSI H35.1/H35.1(M). The equivalent Unified Numbering
E29Practice for Using Significant Digits in Test Data to
SystemalloydesignationsarethoseofTable1precededbyA9,
Determine Conformance with Specifications
for example, A95083 for 5083 in accordance with Practice
E34Test Methods for Chemical Analysis of Aluminum and
E527.
Aluminum-Base Alloys
1.3 ThevaluesstatedineitherSIunits(Table3andTable5) E50Practices for Apparatus, Reagents, and Safety Consid-
or inch-pound units (Table 2 and Table 4) are to be regarded erations for Chemical Analysis of Metals, Ores, and
separately as standard. The values stated in each system may Related Materials
not be exact equivalents; therefore, each system shall be used E527Practice for Numbering Metals and Alloys in the
independently of each other. Combining values from the two Unified Numbering System (UNS)
systems may result in non-conformance with the standard. E607Test Method for Atomic Emission Spectrometric
Analysis Aluminum Alloys by the Point to Plane Tech-
1.4 For acceptance criteria for inclusion of new aluminum
3
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
1.5 This standard does not purport to address all of the
Chemical Composition by Spectrochemical Analysis
safety concerns, if any, associated with its use. It is the
E1251Test Method for Analysis of Aluminum and Alumi-
responsibility of the user of this standard to establish appro-
num Alloys by Spark Atomic Emission Spectrometry
priate safety and health practices and determine the applica-
G66Test Method for Visual Assessment of Exfoliation
bility of regulatory limitations prior to use.
Corrosion Susceptibility of 5XXX Series Aluminum Al-
loys (ASSET Test)
2. Referenced Documents
G67Test Method for Determining the Susceptibility to
2.1 The following documents of the issue in effect on the
Intergranular Corrosion of 5XXX Series Aluminum Al-
date of material purchase, unless otherwise noted, form a part
loysbyMassLossAfterExposuretoNitricAcid(NAMLT
of this specification to the extent referenced herein:
Test)
1 2
This specification is under the jurisdiction ofASTM 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 contactASTM Customer Service at service@astm.org. ForAnnual Book ofASTM
Aluminum Alloy Wrought Products. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Nov. 1, 2009. Published December 2009. Originally the ASTM website.
3
approved in 2003. Last previous edition approved in 2007 as B928/B928M–07. The last approved version of this historical standard is referenced on
DOI: 10.1520/B0928_B0928M-09. 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
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B928/B928M−09
A,B,C
TABLE 1 Chemical Composition Limits
D
Other Elements
Alloy Silicon Iron Copper Manganese Magnesium Chromiu
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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–07 Designation: B928/B928M – 09
Standard Specification for
High Magnesium Aluminum-Alloy Sheet and Plate for Marine
1
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*
1.1 This specification covers high magnesium (Note 1) marine application aluminum-alloy (Note 2), in those alloy-tempers
showninTable2[Table3]andTable4[Table5],forflatsheet,coiledsheet,andplate,inthemillfinishthatareintendedformarine
and similar environments:
NOTE 1—The term high magnesium in the general sense includes those alloys containing 3 % or more nominal magnesium.
NOTE 2—Throughout this specification use of the term alloy in the general sense includes aluminum as well as aluminum alloy.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
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:
2
2.2 ASTM Standards:
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 E3
E3 Guide for Preparation of Metallographic Specimens
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
E55Practice for SamplingWrought Nonferrous Metals andAlloys for Determination of Chemical Composition 50 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
E716 Practices for Sampling Aluminum and Aluminum Alloys for Spectrochemical Analysis
E1251 Test Method for Analysis of Aluminum and Aluminum Alloys by Atomic Emission Spectrometry
1
This specification is under the jurisdiction ofASTM Committee B07 on Light Metals andAlloys and is the direct responsibility of Subcommittee B07.03 onAluminum
Alloy Wrought Products.
Current edition approved May 15, 2007. Published June 2007. Originally approved in 2003. Last previous edition approved in 2004 as B928/B928M–04a. DOI:
10.1520/B0928_B0928M-07.
Current edition approved Nov. 1, 2009. Published December 2009. Originally approved in 2003. Last previous edition approved in 2007 as B928/B928M – 07. DOI:
10.1520/B0928_B0928M-09.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.ForAnnualBookofASTMStandards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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.
1
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B928/B928M –
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