ASTM B90/B90M-12
(Specification)Standard Specification for Magnesium-Alloy Sheet and Plate
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.TABLE 1 Chemical Composition LimitsANote 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.
Composition %A
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 A Limits are in weight percent maximum unless shown as a range.
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.
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Designation:B90/B90M −12
StandardSpecification for
1
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 Department of Defense.
1. Scope* Magnesium-Alloys, Cast and Wrought
B953 Practice for Sampling Magnesium and Magnesium
1.1 This specification covers magnesium alloys in sheet and
Alloys for Spectrochemical Analysis
plate form designated as shown in Table 1.
B954 Test Method for Analysis of Magnesium and Magne-
1.2 The values stated in either inch-pound or SI units are to
sium Alloys by Atomic Emission Spectrometry
be regarded separately as standards. The SI units are shown in
E29 Practice for Using Significant Digits in Test Data to
brackets or in separate tables or columns. The values stated in
Determine Conformance with Specifications
each system are not exact equivalents; therefore, each system
E55 Practice for Sampling Wrought Nonferrous Metals and
must be used independent of the other. Combining values from
Alloys for Determination of Chemical Composition
the two systems may result in nonconformance with the
3
2.3 Federal Standards:
specification.
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
1.3 Unless the order specifies the “M” specification
Fed. Std. No. 184 Identification Marking of Aluminum,
designation, the material shall be furnished to the inch-pound
Magnesium and Titanium
3
units.
2.4 Military Standards:
MIL-STD-129 Marking for Shipment and Storage
1.4 This standard does not purport to address all of the
4
safety concerns, if any, associated with its use. It is the 2.5 Aerospace Materials Specification:
responsibility of the user of this standard to establish appro-
AMS-M-3171 MagnesiumAlloy, Processes for Pretreatment
priate safety and health practices and determine the applica- and Prevention of Corrosion
bility of regulatory limitations prior to use.
3. Terminology
2. Referenced Documents
3.1 Definitions:
2.1 The following documents of the issue in effect on date 3.1.1 plate—a rolled product rectangular in cross section
of material purchase form a part of this specification to the and form, of thickness 0.250 in., or more, [over 6.30 mm],
extent referenced herein: either sheared or sawed edges.
2
3.1.2 sheet—a rolled product rectangular in cross section
2.2 ASTM Standards:
and form, of thickness of 0.006 through 0.249 in. [over 0.15
B557 Test Methods for Tension Testing Wrought and Cast
through 6.30 mm] with sheared, slit, or sawed edges.
Aluminum- and Magnesium-Alloy Products
B557M Test Methods for Tension Testing Wrought and Cast
4. Ordering Information
Aluminum- and Magnesium-Alloy Products (Metric)
B660 Practices for Packaging/Packing of Aluminum and
4.1 Orders for sheet and plate to this specification shall
Magnesium Products
include the following information:
B951 PracticeforCodificationofUnalloyedMagnesiumand
4.1.1 Quantity in pieces, lbs, or [kg]
4.1.2 Alloy (Section 5 and Table 1),
4.1.3 Temper (Section 6 and Table 2),
1
This specification is under the jurisdiction of ASTM Committee B07 on Light
4.1.4 Thickness, width, and length,
Metals and Alloys and is the direct responsibility of Subcommittee B07.04 on
4.1.5 Surface treatment (see 8.2),
Magnesium Alloy Cast and Wrought Products.
Current edition approved Nov. 1, 2012. Published November 2012. Originally
approved in 1932. Last previous edition approved in 2007 as B90/B90M – 07. DOI:
3
10.1520/B0090_B0090M-12. Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM www.dodssp.daps.mil.
4
Standards volume information, refer to the standard’s Document Summary page on Available from SAE International (SAE), 400 Commonwealth Dr.,Warrendale,
the ASTM website. PA 15096-0001, http://www.sae.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
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B90/B90M−12
4.1.6 Whether inspection is required at the manufacturer’s 7.4 Squareness of sheet and plate shall conform to the
works (see 13.1), and requirements of Table 14 [Table 15].
4.1.7 Whether certification of the material by the vendor is
7.5 Flatness of sheet and plate shall conform to the require-
required (Section 15).
A
T
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Designation: B90/B90M − 07 B90/B90M − 12
Standard Specification for
1
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 Department of Defense.
1. Scope 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.
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
2.2 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
B951 Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
B953 Practice for Sampling Magnesium and Magnesium Alloys for Spectrochemical Analysis
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
3
E35 Test Methods for Chemical Analysis of Magnesium and Magnesium Alloys (Withdrawn 2008)
E55 Practice for Sampling Wrought Nonferrous Metals and Alloys for Determination of Chemical Composition
3
2.3 Federal Standards:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
Fed. Std. No. 184 Identification Marking of Aluminum, Magnesium and Titanium
3
2.4 Military Standards:
MIL-STD-129 Marking for Shipment and Storage
MIL-M-3171 Magnesium Alloy, Processes for Pretreatment and Prevention of Corrosion
4
2.5 Aerospace Materials Specification:
AMS-M-3171 Magnesium Alloy, Processes for Pretreatment and Prevention of Corrosion
3. Terminology
3.1 Definitions:
3.1.1 plate—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—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, or [kg]
*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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B90/B90M − 12
4.1.2 Alloy (Section 5 and Table 1),
4.1.3 Temper (Section 6 and Table 2),
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).
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
A
Limits are in weight percent maximum unless shown as a range.
5. Chemical Composition
5.1 The sheet and plate shall conform to the chemical requirements in Table 1.
6. Tensile Properties
6.1 The shee
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