ASTM B94-04
(Specification)Standard Specification for Magnesium-Alloy Die Castings
Standard Specification for Magnesium-Alloy Die Castings
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: B 94 – 04
Standard Specification for
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Magnesium-Alloy Die Castings
ThisstandardisissuedunderthefixeddesignationB 94;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (e) 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* and Magnesium Alloys
E 88 Practice for Sampling Nonferrous Metals and Alloys
1.1 This specification covers magnesium-alloy die castings.
in Cast Form for Determination of Chemical Composition
Currentalloycompositionsarespecifiedunderthedesignations
2 E 505 Reference Radiographs for Inspection of Aluminum
shown in Table 1.
and Magnesium Die Castings
1.2 The values stated in inch-pound units are standard. The
E 527 Practice for Numbering Metals and Alloys (UNS)
SI values in parentheses are provided for information only.
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2.3 American Die Casting Institute:
1.3 This standard does not purport to address all of the
“E” Series Product Standards
safety concerns, if any, associated with its use. It is the
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2.4 Federal Standards:
responsibility of the user of this standard to establish appro-
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
priate safety and health practices and determine the applica-
Fed. Std. No. 184 Identification Marking of Aluminum,
bility of regulatory limitations prior to use.
Magnesium and Titanium
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2. Referenced Documents
2.5 Military Standard:
MIL-STD-129 Marking for Shipment and Storage
2.1 The following documents of the issue in effect on date
of order acceptance form a part of this specification to the
3. Terminology
extent referenced herein:
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3.1 Definition:
2.2 ASTM Standards:
3.1.1 die casting—a metal object produced by the introduc-
B 93/B 93M Specification for Magnesium Alloys in Ingot
tion of molten metal under substantial pressure into a metal die
Form for Sand Castings, Permanent Mold Castings, and
and characterized by a high degree of fidelity to the die cavity.
Die Castings
B 275 Practice for Codification of Certain Nonferrous Met-
4. Ordering Information
als and Alloys, Cast and Wrought
4.1 Orders for die castings shall include the following basic
B 557 Test Methods of Tension Testing Wrought and Cast
information:
Aluminum- and Magnesium-Alloy Products
4.1.1 This specification number and date,
B 660 Practices for Packaging/Packing of Aluminum and
4.1.2 Quantity and delivery schedule, as required,
Magnesium Products
4.1.3 Part name and number,
E 23 Test Methods for Notched Bar Impact Testing of
4.1.4 Alloy (Table 1), and
Metallic Materials
4.1.5 Drawing of die casting, when required, giving all
E 29 Practice for Using Significant Digits in Test Data to
necessary dimensions and showing latest revisions and allow-
Determine Conformance with Specifications
ances for machining, if any. Location of ejector pin marks or
E 35 Test Methods for Chemical Analysis of Magnesium
parting lines shall be at the option of the producer, unless
specifically designated on the drawing.
1 4.2 Additional tests, options, and special inspection require-
This specification is under the jurisdiction of ASTM Committee B07 on Light
ments as provided below should be justified only on the basis
Metals and Alloys, and is the direct responsibility of Subcommittee B07.04 on
Magnesium Alloy Cast and Wrought Products.
of need. These shall be specified in the contract or purchase
Current edition approved Oct. 1, 2004. Published October 2004. Originally in
order,asadditionalproceduresandextendeddeliverytimemay
1934. Last previous edition approved in 2000 as B 94 – 94 (2000).
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be involved.
SAE specifications No. 501 and 501A conform to the requirements for Alloy
AZ91A and AZ91B respectively. 4.2.1 Chemical analysis (7.1.1),
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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
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the ASTM website. Robbins Ave., Philadelphia, PA 19111-5098.
*A Summary of Changes section appears at the end of this standard.
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B94–04
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
...
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