ASTM B94-18
(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 1.2 (A) 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 the course of routine analysis, further analysis shall be made to determine that these other elements are not in excess of 0.3 %.(B) 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 in accordance with the rounding procedure prescribed in Section 3 of Practice E29.(C) Where single units are shown, these indicate the maximum amounts permitted.(D) ASTM alloy designations were established in accordance with Practice B951, UNS designations were established in accordance with Practice E527.(E) In alloys AS41B, AM50A, AJ52A, AM60B, AJ62A, and AZ91D, if either the minimum manganese limit or the maximum iron limit is not met, then the iron/manganese ratio shall not exceed 0.010, 0.015, 0.015, 0.021, 0.021, and 0.032, respectively.(F) Alloys AJ52A, AJ62A, and AS21B are patented compositions for elevated temperature applications. Interested parties are invited to submit information regarding the identification of alternatives to these compositions to ASTM International. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 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.
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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:B94 −18
Standard Specification for
1
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 U.S. Department of Defense.
1. Scope* B951 PracticeforCodificationofUnalloyedMagnesiumand
Magnesium-Alloys, Cast and Wrought
1.1 This specification covers magnesium-alloy die castings.
B953 Practice for Sampling Magnesium and Magnesium
Currentalloycompositionsarespecifiedunderthedesignations
2 Alloys for Spectrochemical Analysis
shown in Table 1.
B954 Test Method for Analysis of Magnesium and Magne-
1.2 The values stated in inch-pound units are standard. The
sium Alloys by Atomic Emission Spectrometry
SI values in parentheses are provided for information only.
E23 Test Methods for Notched Bar Impact Testing of Me-
1.3 This standard does not purport to address all of the tallic Materials
safety concerns, if any, associated with its use. It is the
E29 Practice for Using Significant Digits in Test Data to
responsibility of the user of this standard to establish appro- Determine Conformance with Specifications
priate safety, health, and environmental practices and deter-
E505 Reference Radiographs for Inspection of Aluminum
mine the applicability of regulatory limitations prior to use. and Magnesium Die Castings
1.4 This international standard was developed in accor-
E527 Practice for Numbering Metals and Alloys in the
dance with internationally recognized principles on standard- Unified Numbering System (UNS)
3
ization established in the Decision on Principles for the
2.3 American Die Casting Institute:
Development of International Standards, Guides and Recom- “E” Series Product Standards
4
mendations issued by the World Trade Organization Technical
2.4 Federal Standards:
Barriers to Trade (TBT) Committee. FED-STD-123 Marking for Shipment (Civil Agencies)
SAE AMS-STD-184 Identification Marking of Aluminum,
2. Referenced Documents
Magnesium and Titanium
4
2.5 Military Standard:
2.1 The following documents of the issue in effect on date
MIL-STD-129 Marking for Shipment and Storage
of order acceptance form a part of this specification to the
extent referenced herein:
3. Terminology
3
2.2 ASTM Standards:
3.1 Definitions:
B93/B93M Specification for Magnesium Alloys in Ingot
3.1.1 die casting—a metal object produced by the introduc-
Form for Sand Castings, Permanent Mold Castings, and
tion of molten metal under substantial pressure into a metal die
Die Castings
and characterized by a high degree of fidelity to the die cavity.
B557 Test Methods for Tension Testing Wrought and Cast
Aluminum- and Magnesium-Alloy Products
4. Ordering Information
B660 Practices for Packaging/Packing of Aluminum and
4.1 Orders for die castings shall include the following basic
Magnesium Products
information:
4.1.1 This specification number and date,
4.1.2 Quantity and delivery schedule, as required,
1
This specification is under the jurisdiction of ASTM Committee B07 on Light
4.1.3 Part name and number,
Metals and Alloys and is the direct responsibility of Subcommittee B07.04 on
Magnesium Alloy Cast and Wrought Products.
4.1.4 Alloy (Table 1), and
Current edition approved May 1, 2018. Published May 2018. Originally
4.1.5 Drawing of die casting, when required, giving all
approved in 1934. Last previous edition approved in 2013 as B94 – 13. DOI:
necessary dimensions and showing latest revisions and allow-
10.1520/B0094-18.
2
SAE specifications No. 501 and 501A conform to the requirements for Alloy ances for machining, if any. Location of ejector pin marks or
AZ91A and AZ91B respectively.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4
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
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
B94−18
A,B,C,D
TABLE 1 Chemical Composition Requirements
Alloy Composition, %
Other
Rare Metallic
B
Desig. UNS Al Mn Sr Zn Cu, max Fe, max
...
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: B94 − 13 B94 − 18
Standard Specification for
1
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. 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-alloy die castings. Current alloy compositions are specified under the designations
2
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 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 order acceptance form a part of this specification to the extent
referenced herein:
3
2.2 ASTM Standards:
B93/B93M Specification for Magnesium Alloys in Ingot Form for Sand Castings, Permanent Mold Castings, and Die Castings
B557 Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
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
E23 Test Methods for Notched Bar Impact Testing of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
E505 Reference Radiographs for Inspection of Aluminum and Magnesium Die Castings
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
3
2.3 American Die Casting Institute:
“E” Series Product Standards
4
2.4 Federal Standards:
FED-STD-123 Marking for Shipment (Civil Agencies)
SAE AMS-STD-184 Identification Marking of Aluminum, Magnesium and Titanium
4
2.5 Military Standard:
MIL-STD-129 Marking for Shipment and Storage
1
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, 2013May 1, 2018. Published June 2013May 2018. Originally approved in 1934. Last previous edition approved in 20072013 as
B94 – 07.B94 – 13. DOI: 10.1520/B0094-13.10.1520/B0094-18.
2
SAE specifications No. 501 and 501A conform to the requirements for Alloy AZ91A and AZ91B respectively.
3
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
4
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://www.dodssp.daps.mil.
*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
1
---------------------- Page: 1 ----------------------
B94 − 18
A,B,C,D
TABLE 1 Chemical Requirements
Composition,
Alloy
%
B
Designation UNS Aluminum Manganese Rare Earth Strontium Zinc Copper, Iron, max Silicon Nickel Other Magnesium
max Metallic
Impurities,
max, each
AS41A M10410 3.5-5.0 0.20-0.50 . . 0.12 0.06 . 0.50-1.5 0.03 . remainder
E E
AS41B M10412 3.5-5.0 0.35-0.7 . . 0.12 0.02 0.0035 0.50-1.5 0.002 0.02 remainder
E E
AM50A M10500 4.4-5.4 0.26-0.6 . . 0.22 0.010 0.004 0.10 0.002 0.02 remainder
AM60A
...
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