ASTM F2660 - 13

    Standard Test Method for Qualifying Coatings for Use on A490 Structural Bolts Relative to Environmental Hydrogen Embrittlement

    Active Standard ASTM F2660 | Developed by Subcommittee: F16.01

    Book of Standards Volume: 01.08


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    ASTM F2660

    Significance and Use

    4.1 This test method describes the testing procedure that shall be used to qualify a coating system that is under consideration for use on ASTM A490 high strength structural bolts made of any steel composition permitted by the A490 specification. The test method measures the susceptibility of coated specimen bolts to the influence of an externally applied potential (see 7.2.3.3) by testing for the threshold of embrittlement in a salt solution environment.

    1. Scope

    1.1 This test method defines the procedures and tests to evaluate the effect of a coating system on the susceptibility to environmental hydrogen embrittlement (EHE) of an ASTM A490 high strength structural bolt.

    1.2 This test method shall qualify a coating system for use with any size of A490 bolts (that is, 1/2 to 1-1/2 in.) high strength structural bolts, relative to EHE.

    1.3 The characteristic to be evaluated by this test method is the susceptibility to EHE caused by hydrogen generated from corrosion protection of the steel bolt by sacrificial galvanic corrosion of the coating. Testing shall be performed on coated, specimen ASTM A490 bolts manufactured to the maximum susceptible tensile strength values (see Table 1) of the bolt (see Section 5 Specimen Bolt Requirements). The internal hydrogen embrittlement (IHE) susceptibility will also be inherently evaluated when the EHE is tested through this test method. There is no need for a separate IHE susceptibility test.

    1.4 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.

    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 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

    A490 Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength

    E4 Practices for Force Verification of Testing Machines

    E8/E8M Test Methods for Tension Testing of Metallic Materials

    F519 Test Method for Mechanical Hydrogen Embrittlement Evaluation of Plating/Coating Processes and Service Environments

    F606 Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets

    F1624 Test Method for Measurement of Hydrogen Embrittlement Threshold in Steel by the Incremental Step Loading Technique

    F1789 Terminology for F16 Mechanical Fasteners

    F2078 Terminology Relating to Hydrogen Embrittlement Testing

    G3 Practice for Conventions Applicable to Electrochemical Measurements in Corrosion Testing

    G15 Terminology Relating to Corrosion and Corrosion Testing

    G44 Practice for Exposure of Metals and Alloys by Alternate Immersion in Neutral 3.5 % Sodium Chloride Solution

    G82 Guide for Development and Use of a Galvanic Series for Predicting Galvanic Corrosion Performance

    Research Council on Structural Connections

    SpecificationforStru Allowable Stress Design

    SpecificationforStru Load and Resistance Factor Design

    Other References

    Raymond,L., The Susceptibility of Fasteners to Hydrogen Embrittlement and Stress Corrosion Cracking: Fastener System Design. In J. H. Bickford, & S. Nassar, Handbook of Bolts and Bolted Joints, New York, USA: Marcel Dekker, Inc., 1998, pp. 723-756

    TownsendJr.,H.E., Met Trans, V6A, April, 1976

    International Standards Organization (ISO)

    ISO17025 General Requirements for the Competence of Testing and Calibration Laboratories


    ICS Code

    ICS Number Code 21.060.10 (Bolts, screws, studs)

    UNSPSC Code

    UNSPSC Code 23153800(Coating systems)


    DOI: 10.1520/F2660

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