ASTM B94-07
(Specification)Standard Specification for Magnesium-Alloy Die Castings
Standard Specification for Magnesium-Alloy Die Castings
ABSTRACT
This specification covers magnesium-alloy die castings. The magnesium alloys used for the manufacture of die castings shall conform to the chemical composition requirements of this specification. The producer or supplier is responsible for the performance of all inspection and test requirements when specified in the contract or purchase order. Samples for chemical analysis shall be taken from the material by drilling, sawing, milling, turning, or clipping a representative piece or pieces to obtain a weight of prepared sample the soundness of die castings which shall conform to standards or requirements agreed upon between the producer or supplier and the purchaser. Die castings shall have uniform quality that is free from injurious discontinuities that will adversely affect their serviceability. All castings shall be properly marked for identification with the part number, name or brand of the producer, as agreed upon the contract.
SCOPE
1.1 This specification covers magnesium-alloy die castings. Current alloy compositions are specified under the designations shown in Table 1.
1.2 The values stated in inch-pound units are standard. The SI values in parentheses are provided for information only.
1.3 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:B94 −07
StandardSpecification for
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Magnesium-Alloy Die Castings
This standard is issued under the fixed designation B94; 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* E35 Test Methods for ChemicalAnalysis of Magnesium and
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Magnesium Alloys (Withdrawn 2008)
1.1 This specification covers magnesium-alloy die castings.
E88 Practice for Sampling Nonferrous Metals and Alloys in
Currentalloycompositionsarespecifiedunderthedesignations
2 Cast Form for Determination of Chemical Composition
shown in Table 1.
E505 Reference Radiographs for Inspection of Aluminum
1.2 The values stated in inch-pound units are standard. The
and Magnesium Die Castings
SI values in parentheses are provided for information only.
E527 Practice for Numbering Metals and Alloys in the
1.3 This standard does not purport to address all of the Unified Numbering System (UNS)
safety concerns, if any, associated with its use. It is the 3
2.3 American Die Casting Institute:
responsibility of the user of this standard to establish appro-
“E” Series Product Standards
priate safety and health practices and determine the applica-
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2.4 Federal Standards:
bility of regulatory limitations prior to use.
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
Fed. Std. No. 184 Identification Marking of Aluminum,
2. Referenced Documents
Magnesium and Titanium
2.1 The following documents of the issue in effect on date
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2.5 Military Standard:
of order acceptance form a part of this specification to the
MIL-STD-129 Marking for Shipment and Storage
extent referenced herein:
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2.2 ASTM Standards:
3. Terminology
B93/B93M Specification for Magnesium Alloys in Ingot
3.1 Definitions:
Form for Sand Castings, Permanent Mold Castings, and
3.1.1 die casting—a metal object produced by the introduc-
Die Castings
tion of molten metal under substantial pressure into a metal die
B557 Test Methods for Tension Testing Wrought and Cast
and characterized by a high degree of fidelity to the die cavity.
Aluminum- and Magnesium-Alloy Products
B660 Practices for Packaging/Packing of Aluminum and
4. Ordering Information
Magnesium Products
B951 PracticeforCodificationofUnalloyedMagnesiumand
4.1 Orders for die castings shall include the following basic
Magnesium-Alloys, Cast and Wrought
information:
E23 Test Methods for Notched Bar Impact Testing of Me-
4.1.1 This specification number and date,
tallic Materials
4.1.2 Quantity and delivery schedule, as required,
E29 Practice for Using Significant Digits in Test Data to
4.1.3 Part name and number,
Determine Conformance with Specifications
4.1.4 Alloy (Table 1), and
4.1.5 Drawing of die casting, when required, giving all
necessary dimensions and showing latest revisions and allow-
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This specification is under the jurisdiction of ASTM Committee B07 on Light
ances for machining, if any. Location of ejector pin marks or
Metals and Alloys and is the direct responsibility of Subcommittee B07.04 on
parting lines shall be at the option of the producer, unless
Magnesium Alloy Cast and Wrought Products.
specifically designated on the drawing.
Current edition approved June 1, 2007. Published June 2007. Originally
approved in 1934. Last previous edition approved in 2005 as B94 – 05. DOI:
10.1520/B0094-07.
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SAE specifications No. 501 and 501A conform to the requirements for Alloy
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AZ91A and AZ91B respectively. The last approved version of this historical standard is referenced on
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or www.astm.org.
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contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Standards volume information, refer to the standard’s Document Summary page on Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
the ASTM website. www.dodssp.daps.mil.
*A Summary of Changes section appears at the end of this standard
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B94−07
A,B,C,D
TABLE 1 Chemical Requirements
Alloy Composition, %
B
Designation UNS Aluminum Manganese Rare Strontium Zinc Copper, Iron, Silicon Nickel Other Magnesium
Earth max max Metallic
Impurities,
max,
each
AS41A M10410 3.5-5.0 0.20-0.50 . . 0.12 0.06 . 0.50- 0.03 . remainder
1.5
E E
AS41B M10412 3.5-5.0 0.35-0.7 . . 0.12 0.02 0.0035 0.50- 0.002 0.02 remainder
1.5
E E
AM50A M10500 4.4-5.4 0.26-0.6 . . 0.22 0.
...
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