ASTM B90/B90M-12

    Historical Standard: ASTM B90/B90M-12 Standard Specification for Magnesium-Alloy Sheet and Plate

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    ASTM B90 / B90M

    1. Scope

    1.1 This specification covers magnesium alloys in sheet and plate form designated as shown in Table 1.

    TABLE 1 Chemical Composition LimitsA
    Note 1Analysis 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 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 2The 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.

     

    Composition %A

     

    Al

    Mn

    R.E.

    Zn

    Zr

    Ca

    Cu

    Fe

    Ni

    Si

    Each

    Total

    Mg

    AZ31B

    2.5-3.5

    0.20-1.0

    . . .

    0.6-1.4

    . . .

    0.04

    0.05

    0.005

    0.005

    0.10

    . . .

    0.30

    Remainder

    A Limits are in weight percent maximum unless shown as a range.

    1.2 The values stated in either inch-pound or SI units are to be regarded separately as standards. The SI units are shown in brackets or in separate tables or columns. The values stated in each system are not exact equivalents; therefore, each system must be used independent of the other. Combining values from the two systems may result in nonconformance with the specification.

    1.3 Unless the order specifies the “M” specification designation, the material shall be furnished to the inch-pound units.

    1.4 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.


    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

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

    B557M Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products (Metric)

    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

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

    E55 Practice for Sampling Wrought Nonferrous Metals and Alloys for Determination of Chemical Composition

    Federal Standards

    Fed.Std.No.184 Identification Marking of Aluminum, Magnesium and Titanium

    Military Standards

    MIL-STD-129 Marking for Shipment and Storage

    Aerospace Materials Specification

    AMS-M-3171 Magnesium Alloy, Processes for Pretreatment and Prevention of Corrosion


    ICS Code

    ICS Number Code 77.150.20 (Magnesium products)

    UNSPSC Code

    UNSPSC Code 30261800(Magnesium bars and sheets)


    DOI: 10.1520/B0090_B0090M-12

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