ASTM B618 / B618M - 11a

    Standard Specification for Aluminum-Alloy Investment Castings

    Active Standard ASTM B618 / B618M | Developed by Subcommittee: B07.01

    Book of Standards Volume: 02.02


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    Abstract

    This specification covers aluminum-alloy investment castings. Unless otherwise specified, only aluminum alloy conforming to the requirements shall be used in the remelting furnace from which molten metal is taken for pouring directly into castings. The castings shall conform to the chemical composition requirements specified. The determination of chemical composition shall be made in accordance with suitable chemical (test methods E 34), or spectrochemical (test methods E 607 and E 1251) methods. Unless otherwise specified, only aluminum alloy conforming to the requirements shall be used in the remelting furnace from which molten metal is taken for pouring directly into castings. Foundry control shall consist of examination of castings by radiographic or other approved methods for determining internal discontinuities until the gating, pouring, and other foundry practices have been established to produce castings meeting the required quality standards. The tensile properties shall be determined in accordance with test methods B 557 and B 557M. Heat treatment of castings shall be performed in accordance with practice B 917/B 917M.

    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.

    Significance and Use

    1. Scope

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

    1.2 This specification is for aluminum-alloy investment castings used in general purpose applications. It may not address the mechanical properties integrity testing and verification required for highly loaded or safety critical applications.

    1.3 Alloy and temper designations are in accordance with ANSI H35.1/H35.1 (M). The equivalent Unified Numbering System alloy designations are in accordance with Practice E527.

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

    1.5 For acceptance criteria for inclusion of new aluminum and aluminum alloys and their properties in this specification, see Annex A1 and Annex A2.

    1.6 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.

    1.7 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.

    TABLE 1 Chemical Composition Requirements

    Note 1—When single units are shown, these indicate the maximum amounts permitted.

    Note 2—Analysis shall be made for the elements for which limits are shown in this table.

    Note 3—The 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 off to the nearest unit in the last right-hand place of figures used in expressing the specified limit (Practice E29).

    AlloyComposition, %
    ANSIA UNSSiliconIronCopper Man-
    ganese
    Mag-
    nesium
    Chro-
    mium
    NickelZincTitan-
    ium
    TinOtherB
    Elements
    Aluminum
    EachTotalC
    201.0 A020100.100.154.05.2 0.200.500.150.55... ......0.150.35...D0.050.10remainder
    204.0 A020400.200.354.25.0 0.100.150.35...0.050.100.150.30 0.050.05 0.15remainder
    242.0 A024200.71.03.54.5 0.351.21.80.251.72.30.350.25 ...0.050.15remainder
    295.0 A029500.71.51.04.05.00.350.03......0.350.25 ...0.050.15remainder
    319.0 A031905.56.51.03.04.00.500.10...0.351.00.25 ......0.50remainder
    328.0 A032807.58.51.01.02.00.200.60.200.60.35 0.251.50.25......0.50remainder
    355.0 A035504.55.50.6E1.01.50.50E0.400.60.25... 0.350.25...0.050.15remainder
    C355.0 A335504.55.50.201.01.50.100.400.6... ...0.100.20...0.05 0.15remainder
    356.0 A035606.57.50.6E0.250.35E0.200.45...... 0.350.25...0.050.15remainder
    A356.0 A135606.57.60.200.20 0.100.250.45......0.100.20 ...0.050.15remainder
    443.0 A044304.56.00.80.6 0.500.050.25...0.500.25... ...0.35remainder
    B443.0 A244304.56.00.80.15 0.350.05......0.350.25... 0.050.15remainder
    514.0 A051400.350.500.150.353.54.5......0.150.25... 0.050.15remainder
    520.0 A052000.250.300.250.159.510.6......0.150.25... 0.050.15remainder
    535.0 A053500.150.150.050.100.256.27.5.........0.100.25...F0.05 0.15remainder
    705.0 A070500.200.80.200.400.61.41.80.200.40...2.73.30.25...0.05 0.15remainder
    707.0 A070700.200.80.200.400.61.82.40.200.40...4.04.50.25...0.05 0.15remainder
    710.0GA071000.150.500.350.650.05 0.60.8......6.07.0 0.25...0.050.15 remainder
    712.0GA071200.300.500.250.100.500.650.400.6...5.06.5 0.150.25...0.050.20 remainder
    713.0 A071300.251.10.401.0 0.60.200.500.350.157.08.00.25...0.10 0.25remainder
    771.0 A077100.150.150.100.100.81.00.060.20...6.57.50.100.20...0.05 0.15remainder
    850.0 A085000.70.70.71.3 0.100.10...0.71.3...0.20 5.57.0...0.30remainder
    851.0GA085102.03.00.70.71.30.10 0.10...0.30.7...0.205.57.0...0.30 remainder
    852.0GA085200.400.71.72.30.10 0.60.9...0.91.5...0.205.57.0...0.30 remainder

    A ASTM alloy designations are in Practice B275.

    B Others includes listed elements for which no specific limit is shown as well as unlisted metallic elements. The producer may analyze samples for trace elements not specified in the specification. However, such analysis is not required and may not cover all metallic Others elements. Should any analysis by the producer or the purchaser establish that an Others element exceeds the limit of Each or that the aggregate of several Others elements exceeds the limit of Total, the material shall be considered nonconforming.

    C Other ElementsTotal shall be the sum of unspecified metallic elements 0.010 % or more, rounded to the second decimal before determining the sum.

    D Contains silver 0.401.0 %.

    E If iron exceeds 0.45 %, manganese content shall not be less than one half of the iron content.

    F Contains beryllium 0.0030.007 %, boron 0.002 % max.

    G 710.0 formerly A712.0, 712.0 formerly D712.0, 851.0 formerly A850.0, 852.0 formerly B850.0.


    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

    B179 Specification for Aluminum Alloys in Ingot and Molten Forms for Castings from All Casting Processes

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

    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

    B881 Terminology Relating to Aluminum- and Magnesium-Alloy Products

    B917/B917M Practice for Heat Treatment of Aluminum-Alloy Castings from All Processes

    D3951 Practice for Commercial Packaging

    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

    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)

    E607 Test Method for Atomic Emission Spectrometric Analysis Aluminum Alloys by the Point to Plane Technique Nitrogen Atmosphere

    E716 Practices for Sampling and Sample Preparation of Aluminum and Aluminum Alloys for Determination of Chemical Composition by Spectrochemical Analysis

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

    E2422 Digital Reference Images for Inspection of Aluminum Castings

    ANSI Standard

    H35.1/H35.1(M)-2006 American National Standard Alloy and Temper Designation Systems for Aluminum


    ICS Code

    ICS Number Code 77.150.10 (Aluminium products)

    UNSPSC Code

    UNSPSC Code 31101906(Aluminum investment casting)


    DOI: 10.1520/B0618_B0618M-11A

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