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    ASTM A800/A800M-91(1997)e1

    Standard Practice for Steel Casting, Austenitic Alloy, Estimating Ferrite Content Thereof


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    1. Scope

    1.1 This practice covers procedures and definitions for estimating ferrite content in certain grades of austenitic iron-chromium-nickel alloy castings that have compositions balanced to create the formation of ferrite as a second phase in amounts controlled to be within specified limits. Methods are described for estimating ferrite content by chemical, magnetic, and metallographic means.

    1.2 The grades covered by this practice are: CF-3, CF-3A, CF-8, CF-8A, CF-3M, CF-3MA, CF-8M, CF-8C, CG-8M, and CH-10.

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

    1.4 This standard does not purport to address the safety problems, 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

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

    A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products

    A799/A799M Practice for Steel Castings, Stainless, Instrument Calibration, for Estimating Ferrite Content

    A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys

    A1067/A1067M Specification for Test Coupons for Steel Castings

    E353 Test Methods for Chemical Analysis of Stainless, Heat-Resisting, Maraging, and Other Similar Chromium-Nickel-Iron Alloys

    E562 Test Method for Determining Volume Fraction by Systematic Manual Point Count

    Constitution Diagrams

    DeLong Diagram for Estimating Ferrite Content of

    Schaeffler Diagram for Estimating Ferrite Content

    Schoefer Diagram for Estimating Ferrite Content o revision) Appendix of this practice.

    American Welding Society Specification

    AWS A 4.2, Procedures for Calibrating Magnetic Instruments to Measure the Delta Ferrite Content of Austenitic Stainless Steel Weld Metal Available from American Welding Society (AWS), 8669 NW 36 Street, #130, Miami, FL 33166-6672, http://www.aws.org.


    ICS Code

    ICS Number Code 77.140.80 (Iron and steel castings)

    UNSPSC Code

    UNSPSC Code 31101603(Steel sand casting)


    Referencing This Standard

    DOI: 10.1520/A0800_A0800M-91R97E01

    ASTM International is a member of CrossRef.


    Citation Format

    ASTM A800 / A800M-91(1997)e1, Standard Practice for Steel Casting, Austenitic Alloy, Estimating Ferrite Content Thereof, ASTM International, West Conshohocken, PA, 2001, www.astm.org

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