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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.
4.2 Suffix 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 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.
220.127.116.11 Example: ASTM F2325, A32ANBW11 HR252—Example from 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.
1.1 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 and Practice , 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 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.
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 LaticesNomenclature
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 StandardSAE AE-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 Number Code 55.180.99 (Other standards related to freight distribution of goods)
UNSPSC Code 31400000(Gaskets)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM F2325-14(2020), Standard Classification for Multi-Layer Steel (MLS) and Other Metal Layer Gaskets for Transportation Applications, ASTM International, West Conshohocken, PA, 2020, www.astm.orgBack to Top