ASTM B327-13

    Historical Standard: ASTM B327-13 Standard Specification for Master Alloys Used in Making Zinc Die Casting Alloys

    SUPERSEDED (see Active link, below)


    Buy Standard (PDF)
    4 pages
    $44.40

    Active (view current version of standard)


    ASTM B327

    1. Scope

    1.1 This specification covers aluminum–base and zinc–base master alloys used to make zinc die-casting alloys. Alloy compositions specified for aluminum–base master alloys (hardeners) are designated as shown in Table 1. Alloy compositions specified for the zinc-base master alloys are designated as shown in Table 2.

    TABLE 1 Chemical Requirements for Aluminum-Base Master Alloys
    Note 1The following applies to all specified limits in this table: For purposes of determining conformance with this specification, the observed value or calculated value obtained from analysis shall be rounded off “to the nearest unit” in the last right hand place of figures used in expressing the specified limit, in accordance with the rounding method of Practice E29.

    ASTM
    Alloy
    (UNS)

    Composition, percent


    Usage

    Alu-
    minum,
    min

    Copper

    Iron, max

    Silicon, max

    Manga-
    nese,
    max

    MagnesiumA

    Zinc

    Chro-
    mium,
    max

    Nickel, max

    Tin, max

    Lead, maxA

    Cad-
    mium,
    maxA

    ZG71A
    (A07131)

    87.0

    1.7 max

    0.8

    0.7

    0.50

    0.65–1.05

    6.5–7.5

    0.20

    0.20

    0.02

    0.020

    0.010

    1 part by weight of ZG71A, 21 parts by weight of Special High Grade zincB to make ASTM zinc Alloy Z33524 (AG40A)

    A Carried to one additional decimal place to ensure proper control in the final alloy.
    B ASTM Specification B6, for Zinc.
    TABLE 2 Chemical and Color Code Requirements for Zinc-Base Master AlloysA,B,C

    Common
    (UNS)

    Color
    CodeD

    Aluminum

    Magnesium

    Iron
    max.

    Copper
    max.

    Lead
    max.

    Cadmium
    max.

    Tin
    max.

    Zinc

    V12-3
    (Z33730)

    Pink

    11.7–12.6

    0.090–0.16

    0.070

    0.25†

    0.005

    0.004

    0.003

    Remainder

     

     

     

     

     

     

     

     

     

     

    V12–5
    (Z35740)

    Pink/Black

    11.7–12.6

    0.090–0.16

    0.070

    2.1–3.3

    0.005

    0.004

    0.003

    Remainder

    A Zinc-base master alloys V12-3 (Z33730) and V12-5 (Z35740) used for producing die casting alloys may contain nickel, chromium, silicon, and manganese up to 0.02, 0.02, 0.035 and 0.05 %, respectively. No harmful effects have ever been noted due to the presence of these elements in up to these concentrations in die casting alloys and, therefore, analyses are not required for these elements, except that nickel analysis is required when producing die casting alloy Z33526 or Z35532.
    B The UNS assignations were established in accordance with Practice E527.
    C For purposes of determining conformance with this specification, the observed value or calculated value obtained from analysis shall be rounded off “to the nearest unit” in the last right hand place of figures used in expressing the specified limit, in accordance with the rounding method of Practice E29.
    D Refer to Practice B908. (Note: Color Codes indicated are for North American applications.)

    1.2 Aluminum alloy hardeners are added to Special High Grade zinc (per Specification B6) in the proper alloying ratios, as shown in Table 1, to produce zinc alloys for die casting.

    1.3 Zinc-base master alloy is added to Special High Grade zinc (per Specification B6) in the proper alloying ratio, as shown in Table 3, to produce zinc alloy for die casting.

    TABLE 3 Weight Requirements for Zinc-Base Master Alloy Jumbo Ingots
    Note 1These requirements are based on the use of nominal 2400 lb or 1200 lb jumbo ingots of V12 (Z33730).

    Nominal
    Weight, lb

    Weight Range, lbA

    Usage

    Minimum

    Maximum

    2400

    2325

    2475

    1 part by weight of V12-3 (one 2400 lb jumbo ingot), 2 parts by weight (two 2400 lb jumbo ingots) of Special High Grade zinc to make zinc alloy 3 (Zamak 3, UNS Z33524, AG40A)

     

     

     

    or

     

     

     

    1 part by weight of V12-5 (one 2400 lb jumbo ingot), 2 parts by weight (two 2400 lb jumbo ingots) of Special High Grade zinc to make zinc alloy 5 (Zamak 5, UNS Z35532, AC41A)

     

     

     

     

    1200

    1150

    1250

    1 part by weight of V12-3 (one 1200 lb jumbo ingot), 2 parts by weight (one 2400 lb jumbo ingot) of Special High Grade zinc to make zinc alloy 3 (Zamak 3, UNS Z33524, AG40A)

     

     

     

    or

     

     

     

    1 part by weight of V12-5 (one 1200 lb jumbo ingot), 2 parts by weight (one 2400 lb jumbo ingot) of Special High Grade zinc to make zinc alloy 5 (Zamak 5, UNS Z35532, AC41A)

    A Jumbo ingots outside the above weight limits may be acceptable depending upon the chemistry, if mutually agreed upon between the producer and purchaser.

    1.4 Master alloys may be supplied in the form of shot, bar, ingot or jumbo ingot as specified by the purchaser.

    1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

    1.6 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 become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, 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

    B6 Specification for Zinc

    B899 Terminology Relating to Non-ferrous Metals and Alloys

    B908 Practice for the Use of Color Codes for Zinc Casting Alloy Ingot

    B949 Specification for General Requirements for Zinc and Zinc Alloy Products

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

    E34 Test Methods for Chemical Analysis of Aluminum and Aluminum-Base Alloys

    E88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition

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

    E536 Test Methods for Chemical Analysis of Zinc and Zinc Alloys

    E1251 Test Method for Analysis of Aluminum and Aluminum Alloys by Spark Atomic Emission Spectrometry

    ISO Standards

    ISO 3815-1 Zinc and zinc alloys -- Part 1: Analysis of solid samples by optical emission spectrometry

    ISO 3815-2 Zinc and zinc alloys -- Part 2: Analysis by inductively coupled plasma optical emission spectrometry


    ICS Code

    ICS Number Code 77.120.10 (Aluminium and aluminium alloys)

    UNSPSC Code

    UNSPSC Code 11101711(Non ferrous alloy)


    DOI: 10.1520/B0327-13

    ASTM International is a member of CrossRef.


    Citing ASTM Standards
    Back to Top