ASTM B90/B90M-21

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: B90/B90M − 21
Standard Specification for
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Magnesium-Alloy Sheet and Plate
This standard is issued under the fixed designation B90/B90M; 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* Aluminum- and Magnesium-Alloy Products
B557M Test Methods for Tension Testing Wrought and Cast
1.1 This specification covers magnesium alloys in sheet and
Aluminum- and Magnesium-Alloy Products (Metric)
plate form designated as shown in Table 1.
B660 Practices for Packaging/Packing of Aluminum and
1.2 The values stated in either inch-pound or SI units are to
Magnesium Products
be regarded separately as standards. The SI units are shown in
B666/B666M Practice for Identification Marking of Alumi-
brackets or in separate tables or columns. The values stated in
num and Magnesium Products
each system are not exact equivalents; therefore, each system
B954 Test Method for Analysis of Magnesium and Magne-
must be used independent of the other. Combining values from
sium Alloys by Atomic Emission Spectrometry
the two systems may result in nonconformance with the
E29 Practice for Using Significant Digits in Test Data to
specification.
Determine Conformance with Specifications
E55 Practice for Sampling Wrought Nonferrous Metals and
1.3 Unless the order specifies the “M” specification
designation, the material shall be furnished to the inch-pound Alloys for Determination of Chemical Composition
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units.
2.3 Federal Standards:
1.4 This standard does not purport to address all of the Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
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safety concerns, if any, associated with its use. It is the
2.4 Military Standards:
responsibility of the user of this standard to establish appro-
MIL-STD-129 Marking for Shipment and Storage
priate safety, health, and environmental practices and deter-
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2.5 Aerospace Materials Specification:
mine the applicability of regulatory limitations prior to use.
AMS-M-3171 Magnesium Alloy, Processes for Pretreatment
1.5 This international standard was developed in accor-
and Prevention of Corrosion
dance with internationally recognized principles on standard-
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2.6 ANSI Standards:
ization established in the Decision on Principles for the
ANSI H35.2 American National Standard Dimensional Tol-
Development of International Standards, Guides and Recom-
erances for Aluminum Mill Products
mendations issued by the World Trade Organization Technical
ANSI H35.2M American National Standard Dimensional
Barriers to Trade (TBT) Committee.
Tolerances for Aluminum Mill Products
2. Referenced Documents
3. Terminology
2.1 The following documents of the issue in effect on date
of material purchase form a part of this specification to the 3.1 Definitions:
extent referenced herein: 3.1.1 plate, n—a rolled product rectangular in cross section
2 and form, of thickness 0.250 in., or more, [over 6.30 mm],
2.2 ASTM Standards:
either sheared or sawed edges.
B557 Test Methods for Tension Testing Wrought and Cast
3.1.2 sheet, n—a rolled product rectangular in cross section
and form, of thickness of 0.006 through 0.249 in. [over 0.15
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through 6.30 mm] with sheared, slit, or sawed edges.
This specification is under the jurisdiction of ASTM Committee B07 on Light
Metals and Alloys and is the direct responsibility of Subcommittee B07.04 on
Magnesium Alloy Cast and Wrought Products.
Current edition approved May 1, 2021. Published June 2021. Originally
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approved in 1932. Last previous edition approved in 2015 as B90/B90M – 15. DOI: Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,
10.1520/B0090_B0090M-21. Philadelphia, PA 19111-5094, http://quicksearch.dla.mil.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM PA 15096, http://www.sae.org.
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Standards volume information, refer to the standard’s Document Summary page on Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.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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