ASTM F2325 - 14

    Standard Classification for Multi-Layer Steel (MLS) and Other Metal Layer Gaskets for Transportation Applications

    Active Standard ASTM F2325 | Developed by Subcommittee: F03.10

    Book of Standards Volume: 09.02


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    Significance and Use

    4.1 This classification is intended to encourage uniformity in reporting properties of MLS and Metal Layer gaskets, to provide a common language for communications between producers and users, and to guide engineers and designers in the application and construction of commercially available gaskets.

    (A) This classification may also be used to classify Single Layer Steel (SLS) Gaskets.
    (B) Refer to Specification A666 or Specification A109/A109M for Stainless Steel and Low Carbon Steel, respectively. Other metals not referenced in the table or not covered by Specification A666 or Specification A109/A109M must be defined by the producer/user (that is, H – High Temperature Alloy).
    (C) Refer to Practice D1418 for general information regarding rubber coating types and use Classification D2000 to define the physical properties of the rubber. This physical property information is typically specified on the gasket drawing or the customer specification, or both.
    (D) Coated side as specified on part drawing.

    4.2 Suffix Table 2 is provided to allow hardness designation for Active, Inactive, or Load Stoppers.

    4.2.1 If suffixes are not to be used, only the basic callout from Table 1 is required. If a suffix is used for 1 layer, it must be specified for all layers, even if a “0” is used. It cannot be assumed that hardnesses of like layers are the same; if used, all layers must be specified separately. The first layer specified must be indicated on the part drawing. To use a hardness call-out, at the end of the base callout leave a space followed by the “HR” suffix with a series of suffix numbers to specify the hardnesses for each layer.

    4.2.1.1 Example: ASTM F2325, A32ANBW11 HR252—Example from Table 1 modified to add hardness requirement for the three metal layers. Active layers 1 and 3 are designated to be the same, 1/4 hard steel. Stopper layer 2 is designated to be full hard steel.

    1. Scope

    1.1 This classification covers a means for specifying Multi-Layer Steel (MLS) and other Metal Layer Gaskets for Transportation Applications by application and construction. These structures are composed of one or more steel or metal layers of material, which may have coatings or embossments. Commercial materials designated as composite or enveloped gaskets are excluded from this classification and are covered by Classification F868 and Practice F336, respectively.

    1.2 Since all of the properties that contribute to gasket performance are not included, use of this classification as a basis for selecting an MLS or Metal Layer gasket is limited.

    1.3 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 requirements 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

    A109/A109M Specification for Steel, Strip, Carbon (0.25 Maximum Percent), Cold-Rolled

    A666 Specification for Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate, and Flat Bar

    D1418 Practice for Rubber and Rubber Latices--Nomenclature

    D2000 Classification System for Rubber Products in Automotive Applications

    F336 Practice for Design and Construction of Nonmetallic Enveloped Gaskets for Corrosive Service

    F868 Classification for Laminated Composite Gasket Materials

    SAE Standard

    SAEAE-13 Gasket and Joint Design Manual for Engine and Transmission Systems Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001.


    ICS Code

    ICS Number Code 55.180.99 (Other standards related to freight distribution of goods)

    UNSPSC Code

    UNSPSC Code 31400000(Gaskets)


    Referencing This Standard

    DOI: 10.1520/F2325-14

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM F2325-14, Standard Classification for Multi-Layer Steel (MLS) and Other Metal Layer Gaskets for Transportation Applications, ASTM International, West Conshohocken, PA, 2014, www.astm.org

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