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    ASTM G38 - 01(2021)

    Standard Practice for Making and Using C-Ring Stress-Corrosion Test Specimens

    Active Standard ASTM G38 | Developed by Subcommittee: G01.06

    Book of Standards Volume: 03.02


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    Significance and Use

    4.1 The C-ring is a versatile, economical specimen for quantitatively determining the susceptibility to stress-corrosion cracking of all types of alloys in a wide variety of product forms. It is particularly suitable for making transverse tests of tubing and rod and for making short-transverse tests of various products as illustrated for plate in Fig. 1.

    FIG. 1 Sampling Procedure for Testing Various Products

    Sampling Procedure for Testing Various ProductsSampling Procedure for Testing Various Products

    1. Scope

    1.1 This practice covers the essential features of the design and machining, and procedures for stressing, exposing, and inspecting C-ring type of stress-corrosion test specimens. An analysis is given of the state and distribution of stress in the C-ring.

    1.2 Specific considerations relating to the sampling process and to the selection of appropriate test environments are outside the scope of this practice.

    1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

    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.

    NACE Document

    NACE TM0177–96 Laboratory Testing of Metals for Resistance to Sulfide Stress Cracking and Stress Corrosion Cracking in H2S Environments Available from National Association of Corrosion Engineers (NACE), P.O. Box 218340, Houston, TX 77218-8340.


    ICS Code

    ICS Number Code 77.040.30 (Chemical analysis of metals)

    UNSPSC Code

    UNSPSC Code


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

    DOI: 10.1520/G0038-01R21

    Citation Format

    ASTM G38-01(2021), Standard Practice for Making and Using C-Ring Stress-Corrosion Test Specimens, ASTM International, West Conshohocken, PA, 2021, www.astm.org

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