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    ASTM

    ASTM B403 : 12

    Standard Specification for Magnesium-Alloy Investment Castings

    Standard Details

    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.

    General Information

    Status : Historical
    Standard Type: Main
    Document No: ASTM B403 : 12
    Document Year: 2012
    Pages: 4
    • Section Volume:
    • 02.02 Volume 02.02 Aluminum and Magnesium Alloys
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