ASTM B240-09

    Standard Specification for Zinc and Zinc-Aluminum (ZA) Alloys in Ingot Form for Foundry and Die Castings

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    1. Scope

    1.1 This specification covers commercial zinc and zinc-aluminum (ZA) alloys in ingot form for remelting for the manufacture of pressure die castings, foundry castings and continuous cast bar stock as designated and specified in Table 1. Seven alloy compositions are specified, designated as follows:

    CommonTraditionalASTMAUNSA
    Alloy 3Zamak 3AG 40AZ33521
    Alloy 7Zamak 7AG 40BZ33522
    Alloy 5Zamak 5AC 41AZ35530
    Alloy 2Zamak 2AC 43AZ35540
    ZA-8ZA-8 ...Z35635
    ZA-12ZA-12...Z35630
    ZA-27ZA-27...Z35840
    __________

    A See Table 1, footnote B.



    1.2 Zinc alloys Z33521, Z33522, Z35530, and Z35540 are used primarily for remelting in the manufacture of pressure die castings. Zinc-aluminum alloys Z35635, Z35630, and Z35840 are used for remelting in the manufacture of both foundry and pressure die castings. Castings made from these ingots are specified in Specification B86, Standard Specification for Zinc and Zinc-Aluminum Alloys for Foundry and Die Castings.

    1.3 The values stated in inch-pound units are to be regarded as standard.

    1.4 Systems of nomenclature used to designate zinc and zinc-aluminum (ZA) alloys used for casting are described in Appendix X1.

    1.5 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.

    TABLE 1 Chemical and North American Color Code Requirements

    Alloy 3 A, B, C, DAlloy 7 A, B, C, DAlloy 5 A,B ,C ,DAlloy 2 A,B ,C,DZA-8 B, C, EZA-12 B, C, EZA-27 B, C, E
    Zamak 3Zamak 7Zamak 5Zamak 2ZA-8ZA-12ZA-27
    (AG40A)(AG40B)(AC41A)(AC43A)
    Z33521Z33522Z35530Z35540Z35635Z35630Z35840
    Color CodeFNoneBrownBlackGreenBlueOrangePurple
    Element
    Aluminum3.9-4.33.9-4.33.9-4.33.9-4.38.2-8.810.8-11.525.5-28.0
    Magnesium0.03-0.060.010-0.0200.03-0.060.025-0.050.02-0.030.02-0.030.012-0.020
    Copper0.10 max0.10 max0.7-1.12.7-3.30.9-1.30.5-1.22.0-2.5
    Iron, Max0.0350.0750.0350.0350.0350.050.07
    Lead, Max0.00400.00300.00400.00400.0050.0050.005
    Cadmium, Max0.00300.00200.00300.00300.0050.0050.005
    Tin, Max0.00150.00100.00150.00150.0020.0020.002
    Nickel- - -0.005-0.020- - -- - -- - - - - - - - -
    ZincGRemainderRemainderRemainderRemainderRemainderRemainderRemainder

    A Zinc alloy ingot for die casting may contain nickel, chromium, silicon, and manganese in amounts of 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 and, therefore, analyses are not required for these elements, except that nickel analysis is required for Z33522.

    B ASTM alloy designations were established in accordance with Practice B275. UNS assignations were established in accordance with Practice E527. The last digit of a UNS number differentiates between alloys of similar composition. UNS designations for ingot and casting versions of an alloy were not assigned in the same sequence for all alloys.

    C For purposes of acceptance and rejection, the observed value or 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 Practice E29.

    D When this material is required to conform to ISO Standard 301, the chemical limits for thallium and indium each shall not exceed 0.001 %.

    E Zinc-aluminum ingot for foundry and pressure die casting may contain nickel, chromium, and manganese in amounts of up to 0.01 % each or 0.03 % total. No harmful effects have ever been noted due to the presence of these elements in up to these concentrations and, therefore, analyses are not required for these elements.

    F Refer to Practice B908. (Note: Colors indicated are for North American applications.)

    G Determined arithmetically by difference.


    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

    B86 Specification for Zinc and Zinc-Aluminum (ZA) Alloy Foundry and Die Castings

    B275 Practice for Codification of Certain Nonferrous Metals and Alloys, Cast and Wrought

    B897 Specification for Configuration of Zinc and Zinc Alloy Jumbo Block and Half Block Ingot

    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

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

    E536 Test Methods for Chemical Analysis of Zinc and Zinc Alloys

    ISO Standards

    ISO301 Zinc Alloy Ingots Intended for Casting

    ISO3815–1 Zinc and zinc alloys -- Part 1: Analysis of solid samples by optical emission spectrometry.

    ISO3815–2 Zinc and zinc alloys -- Part 2: Analysis by inductively coupled plasma optical emission spectrometry.


    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/B0240-09

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