ASTM A990 / A990M - 18

    Standard Specification for Castings, Iron-Nickel-Chromium and Nickel Alloys, Specially Controlled for Pressure-Retaining Parts for Corrosive Service

    Active Standard ASTM A990 / A990M | Developed by Subcommittee: A01.18

    Book of Standards Volume: 01.02


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    Abstract

    This specification covers iron-nickel-chromium and nickel alloy castings specially processed with restricted melt practices, weldability testing, and nondestructive examination (NDE) requirements for use in pressure retaining parts with corrosive service environments. The choice of manufacturing procedure to be used for producing the alloy castings shall be according to specified metallic contents. Materials shall conform to specified chemical composition and tensile property requirements, and weldability qualifications. Nondestructive examination requirements such as casting thickness shall be evaluated by visual, radiographic, and liquid penetrant inspection. Castings shall be repair welded and solution heat treated prior to final cleaning by blasting, and shall not be peened, plugged, or impregnated.

    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.

    1. Scope

    1.1 This specification covers iron-nickel-chromium and nickel alloy castings specially processed with restricted melt practices, weldability testing, and nondestructive examination (NDE) requirements.

    1.2 A number of grades of iron-nickel-chromium and nickel alloy castings are included in this specification. Since these grades possess varying degrees of suitability for service in corrosive environments, it is the responsibility of the purchaser to determine which grade shall be furnished. Selection will depend on design and service conditions, mechanical properties, and corrosion-resistant characteristics.

    1.3 The 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.

    1.3.1 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract specifies the applicable M-specification designation (SI units), the inch-pound units shall apply. Within the text, the SI units are shown in brackets or parentheses.

    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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

    1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


    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

    A351/A351M Specification for Castings, Austenitic, for Pressure-Containing Parts

    A488/A488M Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel

    A494/A494M Specification for Castings, Nickel and Nickel Alloy

    A703/A703M Specification for Steel Castings, General Requirements, for Pressure-Containing Parts

    A743/A743M Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application

    A744/A744M Specification for Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service

    A802/A802M Practice for Steel Castings, Surface Acceptance Standards, Visual Examination

    A903/A903M Specification for Steel Castings, Surface Acceptance Standards, Magnetic Particle and Liquid Penetrant Inspection

    A985/A985M Specification for Steel Investment Castings General Requirements, for Pressure-Containing Parts

    E94/E94M Guide for Radiographic Examination Using Industrial Radiographic Film

    E165/E165M Practice for Liquid Penetrant Examination for General Industry

    E186 Reference Radiographs for Heavy-Walled (2 to 412 in. (50.8 to 114 mm)) Steel Castings

    E272 Reference Radiographs for High-Strength Copper-Base and Nickel-Copper Alloy Castings

    E280 Reference Radiographs for Heavy-Walled (412 to 12 in. (114 to 305 mm)) Steel Castings

    E446 Reference Radiographs for Steel Castings Up to 2 in. (50.8 mm) in Thickness

    AWS Standards

    AWS A5.14/A5.14M

    AWS A5.4

    AWS A5.9

    ASME/ANSI Standard

    ASME/ANSI B16.34 ValvesFlanged, Threaded, and Welding End


    ICS Code

    ICS Number Code 77.120.40 (Nickel, chromium and their alloys)

    UNSPSC Code

    UNSPSC Code 31100000(Castings and casting assemblies)


    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/A0990_A0990M-18

    Citation Format

    ASTM A990 / A990M-18, Standard Specification for Castings, Iron-Nickel-Chromium and Nickel Alloys, Specially Controlled for Pressure-Retaining Parts for Corrosive Service, ASTM International, West Conshohocken, PA, 2018, www.astm.org

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