ASTM B91-07
(Specification)Standard Specification for Magnesium-Alloy Forgings
Standard Specification for Magnesium-Alloy Forgings
ABSTRACT
This specification covers UNS M11311, M11610, M11800, or M16600 magnesium alloy forgings. The conformance of each material to the required chemical composition can be determined using any suitable method of chemical analysis. Samples for chemical analysis should be taken when the ingots are poured or from the finished or semi-finished products by drilling, sawing, milling, turning, or clipping. The variations in testing speed do not seriously affect the obtained tensile property values. However, care must be exercised so that the testing speed does not exceed the ability of the equipment to function satisfactorily. Unless specified, forgings should be chrome pickled before shipment.
SCOPE
1.1 This specification covers magnesium alloy forgings designated as shown in Table 1.
1.2 The values stated in inch-pound units are the standard. The SI values in parentheses are provided for information only.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:B91 −07
StandardSpecification for
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Magnesium-Alloy Forgings
This standard is issued under the fixed designation B91; 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.Asuperscript
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 2.4 Military Standards:
MIL-M-3171 Magnesium Alloy, Processes for Pretreatment
1.1 This specification covers magnesium alloy forgings
and Prevention of Corrosion on
designated as shown in Table 1.
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MIL-STD-129 Marking for Shipment and Storage
1.2 The values stated in inch-pound units are the standard.
TheSIvaluesinparenthesesareprovidedforinformationonly.
3. Terminology
3.1 Definitions:
2. Referenced Documents
3.1.1 forging—a metal part worked to a predetermined
2.1 The following documents of the issue in effect on date
shape by one or more such processes as hammering, upsetting,
of material purchase form a part of this specification to the
pressing, or rolling.
extent referenced herein:
3.1.2 die forging—a forging formed to the required shape
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2.2 ASTM Standards:
and size by working in impression dies.
B557 Test Methods for Tension Testing Wrought and Cast
3.1.3 hammer forging—a forging produced by repeated
Aluminum- and Magnesium-Alloy Products
blows in a forging hammer.
B660 Practices for Packaging/Packing of Aluminum and
Magnesium Products 3.1.4 hand forging—a forging worked between flat or sim-
B951 PracticeforCodificationofUnalloyedMagnesiumand
ply shaped dies by repeated strokes or blows and manipulation
Magnesium-Alloys, Cast and Wrought of the piece.
E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
4. Ordering Information
E35 Test Methods for ChemicalAnalysis of Magnesium and
4.1 Orders for forgings under this specification shall include
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Magnesium Alloys (Withdrawn 2008)
the following information:
E55 Practice for Sampling Wrought Nonferrous Metals and
4.1.1 Quantity of each forging,
Alloys for Determination of Chemical Composition
4.1.2 Alloy (Section 6 and Table 1),
2.3 Federal Standards:
4.1.3 Temper (Section 7 and Table 2),
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No. 123 Marking for Shipment (Civil Agencies)
4.1.4 Drawing showing dimensions of all die forgings and
No. 184 Identification Marking of Aluminum, Magnesium,
for all hand forgings not simple disks, rounds, squares, or
and Titanium.
rectangles (the amount of stock left for machine finish should
be indicated),
4.1.5 Surface treatment (see 9.1),
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This specification is under the jurisdiction of ASTM Committee B07 on Light
4.1.6 Whether inspection is required at the manufacturer’s
Metals and Alloys and is the direct responsibility of Subcommittee B07.04 on
works (see 10.1),
Magnesium Alloy Cast and Wrought Products.
Current edition approved June 1, 2007. Published June 2007. Originally 4.1.7 Special inspection requirements (see 10.2),
approved in 1932. Last previous edition approved in 2004 as B91 – 97 (2004). DOI:
4.1.8 Whether certification is required (see 12.1), and
10.1520/B0091-07.
2 4.1.9 Whether marking for identification is required (see
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 13.1).
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
5. Quality Assurance
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The last approved version of this historical standard is referenced on
www.astm.org.
5.1 The manufacturer shall be responsible for the perfor-
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Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
mance of all inspection and tests required by this specification,
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
www.dodssp.daps.mil. prior to shipment of the material.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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B91−07
A,B
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
suspectedorindicatedinamountsgreaterthanthespecifiedlimits,furtheranalysisshallbemadetodeterminethattheseelementsarenotpresentinexcess
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, %
Alloy AZ31B Alloy AZ61A Alloy AZ80A Alloy ZK6
...
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