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    ASTM B403 - 12

    Standard Specification for Magnesium-Alloy Investment Castings

    Active Standard ASTM B403 | Developed by Subcommittee: B07.04

    Book of Standards Volume: 02.02

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    Abstract

    This specification covers magnesium-alloy investment castings designated as AM100A, AZ81A, AZ91C, AZ91E, AZ92A, EQ21A, EZ33A, K1A, QE22A, ZE41A, and ZK61A. Sufficient stock shall be allowed for shrinkage and, where required, for finishing; but castings of excessive weight shall not be furnished. The castings shall conform to the chemical composition requirements prescribed for magnesium, aluminum, manganese, zinc, zirconium, rare earth elements, copper, nickel, silicon, iron, and other impurities, as determined by chemical analysis, and shall meet the specified requirements for the tensile properties such as tensile strength, yield strength, and elongation. Requirements for heat treatment and tensile test are detailed. The castings shall be of uniform quality and condition, free from cracks and other injurious defects, shall be cleaned before inspection by blasting or other approved process, and shall not be repaired by welding, impregnation, peening, or other method unless it is required.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This specification covers magnesium-alloy investment castings designated as shown in Table 1.

    TABLE 1 Chemical Composition LimitsA
    Note 1—Analysis shall regularly be made 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 applied 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 off to the nearest unit in the last right-hand place of figures used in expressing the specified limit.

    Alloy Number B

     

    Composition, percent

    Others
     Each

     ASTM

     UNS

     

     Iron

     Magne-
      sium

     

      Alu-
     minum

     Manga-
      nese

     

      Zinc

    Zirconium

      
     Rare Earths

     Thorium

     Copper

     Nickel

    Silicon

      TotalC
      Other
    Impurities

    AM100A

    M10100

     

    ...

    remainder

     

    9.3–10.7

    0.10–0.35

     

    0.30

    ...

    ...

    ...

    0.10

    0.01

    0.30

      0.30

      ...

    AZ81A

    M11810

     

    ...

    remainder

     

    7.0–8.1

    0.13–0.35

     

    0.40–1.0

    ...

    ...

    ...

    0.10

    0.01

    0.30

      0.30

      ...

    AZ91C

    M11914

     

    ...

    remainder

     

    8.1–9.3

    0.13–0.35

     

    0.40–1.0

    ...

    ...

    ...

    0.10

    0.01

    0.30

      0.30

      ...

    AZ91E

    M11919

     

    0.005D E

    remainder

     

    8.1–9.3

    0.17–0.35

     

    0.40–1.0

    ...

    ...

    ...

    0.015

    0.0010

    0.20

      0.30

      0.01

    AZ92A

    M11920

     

    ...

    remainder

     

    8.3–9.7

    0–0.35

     

    1.6–2.4

    ...

    ...

    ...

    0.10

    0.01

    0.30

      0.30

      ...

    EQ21A

    M18330

     

    ...

    remainder

     

    ...

    ...

     

    ...

    0.40–1.0

    1.5–3.0F

    ...

    0.05–0.10

    0.01

    ...

      0.30

      ...

    EZ33A

    M12330

     

    ...

    remainder

     

    ...

    ...

     

    2.0–3.1

    0.50–1.0

    2.5–4.0

    ...

    0.10

    0.01

    ...

      0.30

      ...

    K1A

    M18010

     

    ...

    remainder

     

    ...

    ...

     

    ...

    0.40–1.0

    ...

    ...

    ...

    ...

    ...

      0.30

      ...

    QE22AG

    M18220G

     

    ...

    remainder

     

    ...

    ...

     

    ...

    0.40–1.0

    1.8–2.5F

    ...

    0.10

    0.01

    ...

      0.30

      ...

    ZE41A

    M16410

     

    ...

    remainder

     

    ...

    0.15

     

    3.5–5.0

    0.40–1.0

    0.75–1.75

    ...

    0.10

    0.01

    ...

      0.30

      ...

    ZK61A

    M16610

     

    ...

    remainder

     

    ...

    ...

     

    5.5–6.5

    0.6–1.0

    ...

    ...

    0.10

    0.01

    ...

      0.30

      ...

    A Limits are in weight percent maximum unless shown as a range or stated otherwise.
    B  These alloy designations were established in accordance with Practice B951.
    C  Includes listed elements for which no specific limit is shown.
    D If iron content exceeds 0.005 %, the iron to manganese ratio shall not exceed 0.032.
    E Silver content for Alloy EQ21A shall be 1.3 to 1.7 %.
    F Rare earth elements are in the form of didymium.
    G Silver content for Alloy QE22A shall be 2.0 through 3.0 %.

    1.2 Alloy designations are in accordance with Practice E527; temper designations are in accordance with Practice B296.

    1.3 The values stated in inch-pound units are to be regarded as the standard. The SI values in parentheses are for information only.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    B296 Practice for Temper Designations of Magnesium Alloys, Cast and Wrought

    B557 Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products

    B660 Practices for Packaging/Packing of Aluminum and Magnesium Products

    B661 Practice for Heat Treatment of Magnesium Alloys

    B666/B666M Practice for Identification Marking 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

    D3951 Practice for Commercial Packaging

    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

    E94 Guide for Radiographic Examination

    E155 Reference Radiographs for Inspection of Aluminum and Magnesium Castings

    E165 Practice for Liquid Penetrant Examination for General Industry

    E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

    Federal Standards

    Fed. Std. No. 123 Marking for Shipping (Civil Agencies) Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://www.dodssp.daps.mil.

    Military Standards

    MIL-STD-129 Marking for Shipment and Storage (Military Agencies)

    ICS Code

    ICS Number Code 77.150.20 (Magnesium products)

    UNSPSC Code

    UNSPSC Code

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/B0403-12

    Citation Format

    ASTM B403-12, Standard Specification for Magnesium-Alloy Investment Castings, ASTM International, West Conshohocken, PA, 2012, www.astm.org

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