ASTM B90/B90M-21

Standard Specification for Magnesium-Alloy Sheet and Plate

ABSTRACT
This specification covers magnesium-alloy sheet and plate designated as AZ31B in temper types O, H24, and H26. The sheet and plate shall conform to the chemical composition requirements prescribed for magnesium, aluminum, manganese, zinc, calcium, copper, iron, nickel and silicon, and shall meet the specified requirements for the tensile properties such as tensile strength, yield strength, and elongation for the corresponding specified thickness. Requirements for chemical analysis and tensile test including sampling are detailed.
SCOPE
1.1 This specification covers magnesium alloys in sheet and plate form designated as shown in Table 1.  
1.2 The values stated in either inch-pound or SI units are to be regarded separately as standards. The SI units are shown in brackets or in separate tables or columns. The values stated in each system are not exact equivalents; therefore, each system must be used independent of the other. Combining values from the two systems may result in nonconformance with the specification.  
1.3 Unless the order specifies the “M” specification designation, the material shall be furnished to the inch-pound units.  
1.4 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.  
1.5 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.

General Information

• Status: Published
• Publication Date: 30-Apr-2021
• ICS: 77.150.20 - Magnesium products
• Technical Committee: B07 - Light Metals and Alloys
• Drafting Committee: B07.04 - Magnesium Alloy Cast and Wrought Products

Relations

• Refers: ASTM B660-23 - Standard Practices for Packaging/Packing of Aluminum and Magnesium Products
• Effective Date: 01-Nov-2023
• Refers: ASTM B557M-14 - Standard Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products (Metric)
• Effective Date: 15-May-2014
• Refers: ASTM B557-14 - Standard Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
• Effective Date: 15-May-2014
• Refers: ASTM B557-10 - Standard Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
• Effective Date: 01-Jul-2010
• Refers: ASTM B557M-10 - Standard Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products [Metric]
• Effective Date: 01-Jul-2010
• Refers: ASTM B660-08 - Standard Practices for Packaging/Packing of Aluminum and Magnesium Products
• Effective Date: 15-Oct-2008
• Refers: ASTM E29-08 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 01-Oct-2008
• Refers: ASTM B557M-07e1 - Standard Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products [Metric]
• Effective Date: 01-Sep-2007
• Refers: ASTM B557M-07 - Standard Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products [Metric]
• Effective Date: 01-Sep-2007
• Refers: ASTM B954-07 - Standard Test Method for Analysis of Magnesium and Magnesium Alloys by Atomic Emission Spectrometry
• Effective Date: 01-Jun-2007
• Refers: ASTM E29-06b - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 15-Nov-2006
• Refers: ASTM E29-06a - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 15-Sep-2006
• Refers: ASTM B557-06 - Standard Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
• Effective Date: 01-May-2006
• Refers: ASTM B557M-06 - Standard Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products [Metric]
• Effective Date: 01-May-2006
• Refers: ASTM E29-06 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 01-May-2006

Overview

ASTM B90/B90M-21 is the internationally recognized standard specification for magnesium-alloy sheet and plate, including the widely used AZ31B grade in various tempers (O, H24, H26). Developed by ASTM International, this standard outlines essential requirements for chemical composition, mechanical properties, dimensional tolerances, and suitable finishes, ensuring that magnesium-alloy sheets and plates are manufactured, tested, and supplied consistently across industries.

This standard serves as a critical reference for manufacturers, suppliers, and end-users seeking lightweight, high-strength materials for applications where weight reduction and efficient formability are key priorities. It also helps to harmonize technical and purchasing requirements, facilitating global trade and compliance with safety and regulatory needs.

Key Topics

• Material Scope: Covers magnesium-alloy sheet and plate, specifically AZ31B and ZE10A alloys, in designated tempers.
• Chemical Composition: Specifies allowable ranges and maximums for elements such as magnesium, aluminum, manganese, zinc, calcium, copper, iron, nickel, and silicon to ensure material integrity.
• Mechanical Properties: Sets requirements for tensile strength, yield strength, and elongation based on thickness and temper, providing a basis for engineering and performance evaluation.
• Dimensional Tolerances: Establishes strict thickness, width, length, flatness, and squareness tolerances, aligned with ANSI dimensional standards, to meet precise manufacturing needs.
• Surface Finish: Describes allowable finishes including mill finish, oiled, chrome pickled, and chrome pickled with oil, to enhance corrosion resistance and facilitate further processing.
• Sampling and Testing: Details procedures for chemical analysis and tension testing, including sample frequency, specimen preparation, and acceptance criteria.
• Packaging and Marking: Specifies packaging methods to prevent damage during handling and shipping, and requires clear identification marking for quality control and traceability.

Applications

Magnesium-alloy sheet and plate materials covered by ASTM B90/B90M-21 are valued for their lightweight properties, good weldability, moderate to high strength, and cold formability. Common applications include:

• Aerospace: Airframes, interior panels, and structural components where weight reduction is critical.
• Automotive: Body panels, engine components, and parts designed for fuel efficiency without sacrificing strength.
• Defense: Lightweight armor, missile parts, and specialized military equipment.
• Electronics: Housings and enclosures requiring electromagnetic shielding and light mass.
• Industrial and Commercial Fabrication: Precision parts, forming, and drawing operations; any use where corrosion resistance and lightweight design are advantageous.

AZ31B, the principal alloy, is recognized for its good weldability, high strength-to-weight ratio, and excellent formability, making it a preferred solution in demanding environments. ZE10A is also utilized where superior formability and moderate strength are needed.

Related Standards

The ASTM B90/B90M-21 specification references and collaborates with several other national and ASTM standards to ensure compatibility and broad industry acceptance:

• ASTM B557/B557M: Test Methods for Tension Testing of Wrought and Cast Aluminum- and Magnesium-Alloy Products
• ASTM B660: Practices for Packaging/Packing of Aluminum and Magnesium Products
• ASTM B666/B666M: Practice for Identification Marking of Aluminum and Magnesium Products
• ASTM B954: Test Method for Analysis of Magnesium and Magnesium Alloys by Atomic Emission Spectrometry
• ANSI H35.2/H35.2M: American National Standard Dimensional Tolerances for Aluminum Mill Products (applicable to magnesium)
• AMS-M-3171: Aerospace material specification for processes to pretreat and prevent magnesium alloy corrosion

Compliance with ASTM B90/B90M-21 ensures the use of high-quality magnesium-alloy sheet and plate, enhancing performance, safety, and reliability across critical industries. By following this standard, organizations gain access to globally accepted best practices for material selection, testing, and certification in the field of light metal alloys.

Standards Content (Sample)

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
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
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)
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-
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-
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
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
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.
2 4
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 [e-mail]. For Annual Book of ASTM PA 15096, http://www.sae.org.
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
B90/B90M − 21
A
TABLE 1 Chemical Composition Limits
NOTE 1—Analysis shall regularly be made only for the elements specifically mentioned in this table. If, however, the presence of other elements is
suspected or indicated in amounts greater than the specified limits, further analysis shall be made to determine that these elements are not present in excess
of the specified limits.
NOTE 2—The following applies to all specified limits in this table: For purposes of acceptance and rejection, an observed value or a calculated value
obtained from analysis should be rounded to the nearest unit in the last right-hand place of figures used in expressing the specified limit.
A
Composition %
Al Mn R.E. Zn Zr Ca Cu Fe Ni Si Each Total Mg
AZ31B 2.5–3.5 0.20–1.0 . . . 0.6–1.4 . . . 0.04 0.05 0.005 0.005 0.10 . . . 0.30 Remainder
ZE10A . . . . . . 0.12–0.22 1.0–1.5 . . . . . . . . . . . . . . . . . . . . . 0.30 Remainder
A
Limits are in weight percent maximum unless shown as a range.
4. Ordering Information between seller and purchaser. Properties for sizes and tempers
not shown in Table 2 [Table 3] shall be as agreed upon by seller
4.1 Orders for sheet and plate to this specification shall
and purchaser.
include the following information:
4.1.1 Quantity in pieces, lbs or [kg],
7. Dimensional Tolerances
4.1.2 Alloy (Section 5 and Table 1),
4.1.3 Temper (Section 6 and Table 2),
7.1 Variations from the specified thickness shall not exceed
4.1.4 Thickness, width, and length,
the amounts prescribed in ANSI H35.2 [ANSI 35.2M] Table
4.1.5 Surface treatment (see 8.2),
7.7a.
4.1.6 Whether inspection is required at the manufacturer’s
7.2 Variations from the specified width shall not exceed the
works (see 13.1), and
amounts prescribed in ANSI 35.2 [ANSI 35.2M] Tables 7.8,
4.1.7 Whether certification of the material by the vendor is
7.10, and 7.11.
required (Section 15).
7.3 Variations from the specified length shall not exceed the
5. Chemical Composition
amounts prescribed in ANSI 35.2 [ANSI 35.2M] Tables 7.9
5.1 The sheet and plate shall conform to the chemical
and 7.10.
requirements in Table 1.
7.4 Squareness of sheet and plate shall conform to the
requirements of ANSI 35.2 [ANSI 35.2M] Table 7.14.
6. Tensile Properties
6.1 The sheet and plate shall conform to the tensile require- 7.5 Flatness of sheet and plate shall conform to the require-
ments in Table 2 [Table 3] unless another agreement is made ments of Table 4 [Table 5].
TABLE 2 Tensile Requirements
NOTE 1—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, and each value for elongation shall be rounded to the nearest 0.5 %, both in accordance with the rounding method of Practice E29.
Yield Strength (0.2 % Elongation in 2 in.,
Alloy and Temper Specified Thickness, in. Tensile Strength, min, ksi
Offset), min, ksi or 4× dia min, %
A
AZ31B-O 0.016–0.500 32.0 . . . 12
A
0.501–2.000 32.0 . . . 10
A
2.001–3.000 32.0 . . . 9
AZ31B-H24 0.016–0.249 39.0 29.0 6
0.250–0.374 38.0 26.0 8
0.375–0.500 37.0 24.0 8
0.501–1.000 36.0 22.0 8
1.001–2.000 34.0 20.0 8
2.001–3.000 34.0 18.0 8
AZ31B-H26 0.250–0.374 39.0 27.0 6
0.375–0.500 38.0 26.0 6
0.501–0.750 37.0 25.0 6
0.751–1.000 37.0 23.0 6
1.001–1.500 35.0 22.0 6
1.501–2.000 35.0 21.0 6
ZE10A-O 0.016-0.066 30.0 18.0 15
0.067-0.250 30.0 15.0 15
0.251-0.500 29.0 12.0 12
A
Tensile strength shall be 40.0 ksi max.
B90/B90M − 21
A
TABLE 3 Tensile Requirements [Metric]
Specified Tensile Yield Strength
Elongation, min %
B
Thickness, mm Strength, MPa (0.2 % offset), MPa
Alloy and
Temper
in 5 × dia
C
Over Through Min Max Min in 50 mm
(5.65 V A)
AZ31B-O 0.40 12.50 221 275 . . . 12 . . .
12.50 50.00 221 275 . . . . . . 9
50.00 80.00 221 275 . . . . . . 8
AZ31B-H24 0.40 6.30 269 . . . 200 6 . . .
6.30 10.00 262 . . . 179 8 . . .
10.00 12.50 255 . . . 165 8 . . .
12.50 25.00 248 . . . 152 . . . 7
25.00 50.00 234 . . . 138 . . . 7
50.00 80.00 234 . . . 124 . . . 7
AZ31B-H26 6.30 10.00 269 . . . 186 6 . . .
10.00 12.50 262 . . . 179 6 . . .
12.50 20.00 255 . . . 172 . . . 5
20.00 25.00 255 . . . 159 . . . 5
25.00 40.00 241 . . . 152 . . . 5
40.00 50.00 241 . . . 148 . . . 5
ZE10A-O 0.41 1.52 207 124 15
1.53 6.35 207 103 15
6.36 12.7 200 83 12
A
The basis for establishment of mechanical property limits as shown in Appendix X1.
B
To determine conformance to this specification each value for tensile strength shall be rounded to the nearest 1 MPa and each value for elongation to the nearest 0.5 %,
both in accordance with the rounding-off method of Practice E29.
C
Elongation in 50 mm apply for thicknesses up through 12.50 mm and in 5× diameter (5.65 V A) for thicknesses over 12.50 mm where A is the cross-sectional area of
the specimen.
TABLE 4 Flatness Tolerances—Magnesium Flat Sheet and Plate TABLE 5 Flatness Tolerances, Magnesium Flat Sheet and Plate
[Metric]
A
Maximum Variation from Flat, in.
A
Maximum Variation from Flat mm
AZ31B (-0 and
AZ31B (-H26
Specified -H24 tempers) and
AZ31B
temper)
Specified AZ31B
Thickness, in. ZE10A-O
(−O and H24
Thickness, mm (−H26 Temper)
Tempers)
In any In any In any In any
Over Through
B B B B
1 ft 3 ft 1 ft 3 ft
In Any In Any In Any In Any
B B B B
300 mm 900 mm 300 mm 900 mm
Under 0.126 commercially flat
0.126–0.250 0.020 0.030 0.020 0.030
0–3.20
0.251–0.500 0.024 0.036 0.025 0.038
3.20–6.30 0.50 0.75 0.50 0.75
0.501–1.000 0.030 0.045 0.050 0.075 6.30–12.50 0.60 0.90 0.63 0.95
1.001–2.000 0.040 0.060 0.050 0.075
12.50–25.00 0.75 1.10 1.25 1.90
A 25.00–50.00 1.00 1.50 1.25 1.90
As measured with the plate resting on a flat surface, concave side upward, using
A
a straightedge and a feeler gauge, dial gauge, or scale.
As measured with the plate resting on a flat surface, concave side upward, using
B
Standard measurement is on the 3-ft basis. Widths and lengths less than 3 ft, but
a straightedge and a feeler gauge, dial gauge, or scale.
B
more than 1 ft, have tolerances proportionately less than those for 3 ft, but not
Standard measurement is on the 900 mm basis. Widths and lengths less than
smaller than for any 1 ft. Widths and lengths less than 1 ft have tolerances
900 mm but more than 300 mm have tolerances proportionately less than those f
...

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: B90/B90M − 15 B90/B90M − 21
Standard Specification for
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*
1.1 This specification covers magnesium alloys in sheet and plate form designated as shown in Table 1.
1.2 The values stated in either inch-pound or SI units are to be regarded separately as standards. The SI units are shown in brackets
or in separate tables or columns. The values stated in each system are not exact equivalents; therefore, each system must be used
independent of the other. Combining values from the two systems may result in nonconformance with the specification.
1.3 Unless the order specifies the “M” specification designation, the material shall be furnished to the inch-pound units.
1.4 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.
1.5 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 date of material purchase form a part of this specification to the extent
referenced herein:
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
B954 Test Method for Analysis of Magnesium and Magnesium Alloys by Atomic Emission Spectrometry
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E55 Practice for Sampling Wrought Nonferrous Metals and Alloys for Determination of Chemical Composition
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 Dec. 1, 2015May 1, 2021. Published January 2016June 2021. Originally approved in 1932. Last previous edition approved in 20132015 as
B90/B90M – 13.B90/B90M – 15. DOI: 10.1520/B0090_B0090M-15.10.1520/B0090_B0090M-21.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
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
B90/B90M − 21
A
TABLE 1 Chemical Composition Limits
NOTE 1—Analysis shall regularly be made only for the elements specifically mentioned in this table. If, however, the presence of other elements is
suspected or indicated in amounts greater than the specified limits, further analysis shall be made to determine that these elements are not present in excess
of the specified limits.
NOTE 2—The following applies to all specified limits in this table: For purposes of acceptance and rejection, an observed value or a calculated value
obtained from analysis should be rounded to the nearest unit in the last right-hand place of figures used in expressing the specified limit.
A
Composition %
Al Mn R.E. Zn Zr Ca Cu Fe Ni Si Each Total Mg
AZ31B 2.5-3.5 0.20-1.0 . . . 0.6-1.4 . . . 0.04 0.05 0.005 0.005 0.10 . . . 0.30 Remainder
ZE10A . . . . . . 0.12-0.22 1.0-1.5 . . . . . . . . . . . . . . . . . . . . . 0.30 Remainder
A
TABLE 1 Chemical Composition Limits
NOTE 1—Analysis shall regularly be made only for the elements specifically mentioned in this table. If, however, the presence of other elements is
suspected or indicated in amounts greater than the specified limits, further analysis shall be made to determine that these elements are not present in excess
of the specified limits.
NOTE 2—The following applies to all specified limits in this table: For purposes of acceptance and rejection, an observed value or a calculated value
obtained from analysis should be rounded to the nearest unit in the last right-hand place of figures used in expressing the specified limit.
A
Composition %
Al Mn R.E. Zn Zr Ca Cu Fe Ni Si Each Total Mg
AZ31B 2.5–3.5 0.20–1.0 . . . 0.6–1.4 . . . 0.04 0.05 0.005 0.005 0.10 . . . 0.30 Remainder
ZE10A . . . . . . 0.12–0.22 1.0–1.5 . . . . . . . . . . . . . . . . . . . . . 0.30 Remainder
A
Limits are in weight percent maximum unless shown as a range.
2.3 Federal Standards:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
Fed. Std. No. 184 Identification Marking of Aluminum, Magnesium and Titanium
2.4 Military Standards:
MIL-STD-129 Marking for Shipment and Storage
2.5 Aerospace Materials Specification:
AMS-M-3171 Magnesium Alloy, Processes for Pretreatment and Prevention of Corrosion
2.6 ANSI StandardsStandards:
ANSI H35.2 American National Standard Dimensional Tolerances for Aluminum Mill Products
ANSI H32.2 (M)H35.2M American National Standard Dimensional Tolerances for Aluminum Mill Products
3. Terminology
3.1 Definitions:
3.1.1 plate, n—a rolled product rectangular in cross section and form, of thickness 0.250 in., or more, [over 6.30 mm], either
sheared or sawed edges.
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 through
6.30 mm] with sheared, slit, or sawed edges.
4. Ordering Information
4.1 Orders for sheet and plate to this specification shall include the following information:
4.1.1 Quantity in pieces, lbs,lbs or [kg][kg],
4.1.2 Alloy (Section 5 and Table 1),
4.1.3 Temper (Section 6 and Table 2),
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, DLA Document Services, Building 4/D, 700 Robbins Ave., Philadelphia, PA
19111-5098, http://www.dodssp.daps.mil. 19111-5094, http://quicksearch.dla.mil.
Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001,15096, http://www.sae.org.
nd
Available from AmericalAmerican National Standards Institute, 11 West 42Institute (ANSI), 25 W. Street, 43rd St., 4th Floor, New York, NY 10036.10036,
http://www.ansi.org.
B90/B90M − 21
TABLE 2 Tensile Requirements
NOTE 1—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, and each value for elongation shall be rounded to the nearest 0.5 %, both in accordance with the rounding method of Practice E29.
Elongation in 2 in.,
Yield Strength (0.2 %
Alloy and Temper Specified Thickness, in. Tensile Strength, min, ksi or 4 × dia4× dia
Offset), min, ksi
min, %
A
AZ31B-O 0.016–0.500 32.0 . . . 12
A
AZ31B-O 0.016–0.500 32.0 . . . 12
A
0.501–2.000 32.0 . . . 10
A
2.001–3.000 32.0 . . . 9
AZ31B-H24 0.016–0.249 39.0 29.0 6
0.250–0.374 38.0 26.0 8
0.375–0.500 37.0 24.0 8
0.501–1.000 36.0 22.0 8
1.001–2.000 34.0 20.0 8
2.001–3.000 34.0 18.0 8
AZ31B-H26 0.250–0.374 39.0 27.0 6
0.375–0.500 38.0 26.0 6
0.501–0.750 37.0 25.0 6
0.751–1.000 37.0 23.0 6
1.001–1.500 35.0 22.0 6
1.501–2.000 35.0 21.0 6
ZE10A-O 0.016-0.066 30.0 18.0 15
0.067-0.250 30.0 15.0 15
0.251-0.500 29.0 12.0 12
A
Tensile strength shall be 40.0 ksi max.
4.1.4 Thickness, width, and length,
4.1.5 Surface treatment (see 8.2),
4.1.6 Whether inspection is required at the manufacturer’s works (see 13.1), and
4.1.7 Whether certification of the material by the vendor is required (Section 15).
5. Chemical Composition
5.1 The sheet and plate shall conform to the chemical requirements in Table 1.
6. Tensile Properties
6.1 The sheet and plate shall conform to the tensile requirements in Table 2 [Table 3] unless another agreement is made between
seller and purchaser. Properties for sizes and tempers not shown in Table 2 [Table 3] shall be as agreed upon by seller and
purchaser.
7. Dimensional Tolerances
7.1 Variations from the specified thickness shall not exceed the amounts prescribed in ANSI H35.2/ANSI 35.2(M) H35.2 [ANSI
35.2M] Table 7.7a.
7.2 Variations from the specified width shall not exceed the amounts prescribed in ANSI 35.2/ANSI 35.2(M) 35.2 [ANSI 35.2M]
Tables 7.8, 7.107.10, and 7.11.
7.3 Variations from the specified length shall not exceed the amounts prescribed in ANSI H35.2/ ANSI H35.2(M)35.2 [ANSI
35.2M] Tables 7.9 and 7.10.
7.4 Squareness of sheet and plate shall conform to the requirements of ANSI H35.2/ ANSI H35.2(M)35.2 [ANSI 35.2M] Table
7.14.
B90/B90M − 21
A
TABLE 3 Tensile Requirements [Metric]
Specified Tensile Yield Strength
Elongation, min %
B
Thickness, mm Strength, MPa (0.2 % offset), MPa
Alloy and
Temper
in 5 × dia
C
Over Through Min Max Min in 50 mm
(5.65 V A)
AZ31B-O 0.40 12.50 221 275 . . . 12 . . .
12.50 50.00 221 275 . . . . . . 9
50.00 80.00 221 275 . . . . . . 8
AZ31B-H24 0.40 6.30 269 . . . 200 6 . . .
6.30 10.00 262 . . . 179 8 . . .
10.00 12.50 255 . . . 165 8 . . .
12.50 25.00 248 . . . 152 . . . 7
25.00 50.00 234 . . . 138 . . . 7
50.00 80.00 234 . . . 124 . . . 7
AZ31B-H26 6.30 10.00 269 . . . 186 6 . . .
10.00 12.50 262 . . . 179 6 . . .
12.50 20.00 255 . . . 172 . . . 5
20.00 25.00 255 . . . 159 . . . 5
25.00 40.00 241 . . . 152 . . . 5
40.00 50.00 241 . . . 148 . . . 5
ZE10A-O 0.41 1.52 207 124 15
1.53 6.35 207 103 15
6.36 12.7 200 83 12
A
The basis for establishment of mechanical property limits as shown in Appendix X1.
B
To determine conformance to this specification each value for tensile strength shall be rounded to the nearest 1 MPa and each value for elongation to the nearest 0.5 %,
both in accordance with the rounding-off method of Practice E29.
C
Elongation in 50 mm apply for thicknesses up through 12.50 mm and in 5× diameter (5.65 V A) for thicknesses over 12.50 mm where A is the cross-sectional area of
the specimen.
7.5 Flatness of sheet and plate shall conform to the requirements of Table 4 [Table 5].
7.6 Lateral bow of sheet and plate shall conform to the requirements of ANSI H35.2/ ANSI H35.2(M)35.2 [ANSI 35.2M] Tables
7.12 and 7.13.
8. Workmanship, Finish, and Appearance
8.1 All sheet and plate shall be commercially flat and free of buckles, shall be free of injurious surface defects, and have a
workmanlike finish.
8.2 The sheet or plate shall be supplied in the finish specified by the purchaser. One of the following finishes should be specified:
8.2.1 Mill finish,
8.2.2 Mill finish and oiled,
TABLE 4 Flatness Tolerances—Magnesium Flat Sheet and Plate
A
Maximum Variation from Flat, in.
AZ31B (-0 and
AZ31B (-H26
Specified -H24 tempers) and
temper)
Thickness, in. ZE10A-O
In any In any In any In any
B B B B
1 ft 3 ft 1 ft 3 ft
Under 0.126 commercially flat
0.126–0.250 0.020 0.030 0.020 0.030
0.251–0.500 0.024 0.036 0.025 0.038
0.501–1.000 0.030 0.045 0.050 0.075
1.001–2.000 0.040 0.060 0.050 0.075
A
As measured with the plate resting on a flat surface, con
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