ASTM F2325-14

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

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.
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.

General Information

• Status: Historical
• Publication Date: 30-Jun-2014
• ICS: 55.180.99 - Other standards related to freight distribution of goods
• Technical Committee: F03 - Gaskets
• Drafting Committee: F03.10 - Composite Gaskets

Relations

• Replaces: ASTM F2325-03(2009) - Standard Classification for Multi-Layer Steel (MLS) and Other Metal Layer Gaskets for Transportation Applications
• Effective Date: 01-Jul-2014
• Replaced By: ASTM F2325-14(2020) - Standard Classification for Multi-Layer Steel (MLS) and Other Metal Layer Gaskets for Transportation Applications
• Effective Date: 01-Jan-2020
• Referred By: ASTM F868-17 - Standard Classification for Laminated Composite Gasket Materials
• Effective Date: 01-Jul-2014

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:F2325 −14
Standard Classification for
Multi-Layer Steel (MLS) and Other Metal Layer Gaskets for
1
Transportation Applications
This standard is issued under the fixed designation F2325; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2.2 SAE Standard:
SAEAE-13 Gasket and Joint Design Manual for Engine and
1.1 This classification covers a means for specifying Multi-
3
Transmission Systems
Layer Steel (MLS) and other Metal Layer Gaskets for Trans-
portation Applications by application and construction. These
3. Terminology
structures are composed of one or more steel or metal layers of
3.1 Definitions of Terms Specific to This Standard:
material, which may have coatings or embossments. Commer-
3.1.1 active layer(s)—an embossed layer(s) used to provide
cialmaterialsdesignatedascompositeorenvelopedgasketsare
the primary sealing function.
excluded from this classification and are covered by Classifi-
cation F868 and Practice F336, respectively.
3.1.2 embossment (emboss)—a raised area of a steel or
metal layer in relief from the rest of the layer with a defined
1.2 Since all of the properties that contribute to gasket
geometry typically used at the sealing interface. Embossments
performance are not included, use of this classification as a
may also be used to shift load to areas, which require better
basis for selecting an MLS or Metal Layer gasket is limited.
4
sealing performance.
1.3 This standard does not purport to address all of the
3.1.3 exterior coating—a supplemental coating applied to
safety concerns, if any, associated with its use. It is the
the exterior of the gasket for anti-fret, anti-blocking, or sealing
responsibility of the user of this standard to establish appro-
enhancement.
priate safety and health practices and determine the applica-
bility of regulatory requirements prior to use. 3.1.4 inactive layer(s)—the flat or non-embossed layer(s)
used for spacing or other purposes within the gasket.
2. Referenced Documents
3.1.5 load stop (stopper)—a device used to control com-
2
2.1 ASTM Standards:
pression on Single Layer Steel (SLS) or between layers in an
A109/A109M Specification for Steel, Strip, Carbon (0.25
MLS or Metal Layer gasket.
Maximum Percent), Cold-Rolled
A666 Specification forAnnealed or Cold-WorkedAustenitic 4. Significance and Use
Stainless Steel Sheet, Strip, Plate, and Flat Bar
4.1 This classification is intended to encourage uniformity
D1418 Practice for Rubber and Rubber Latices—
in reporting properties of MLS and Metal Layer gaskets, to
Nomenclature
provide a common language for communications between
D2000 Classification System for Rubber Products in Auto-
producers and users, and to guide engineers and designers in
motive Applications
the application and construction of commercially available
F336 Practice for Design and Construction of Nonmetallic
gaskets.
Enveloped Gaskets for Corrosive Service
4.2 Suffix Table 2 is provided to allow hardness designation
F868 Classification for Laminated Composite Gasket Mate-
for Active, Inactive, or Load Stoppers.
rials
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
1
be specified for all layers, even if a “0” is used. It cannot be
This classification is under the jurisdiction of ASTM Committee F03 on
Gaskets and is the direct responsibility of Subcommittee F03.10 on Composite
assumed that hardnesses of like layers are the same; if used, all
Gaskets.
layers must be specified separately. The first layer specified
Current edition approved July 1, 2014. Published December 2014. Originally
approved in 2003. Last previous edition approved in 2009 as F2325 – 03 (2009).
DOI: 10.1520/F2325-14.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Society of Automotive Engineers (SAE), 400 Commonwealth
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Dr., Warrendale, PA 15096-0001.
4
Standards volume information, refer to the standard’s Document Summary page on Load shifting reference from SAEAE-13, “Gasket and Joint Design Manual for
the ASTM website. Engine and Transmission Systems.”
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F2325−14
A
TABLE 1 Basis of Classification
1st Letter 1st Digit 2nd Digit 2nd Letter 3rd Letter 4th Letter 5th Letter 3rd Digit 4th Digit
Total Number
B C B C
Number of Load Stop Exterior
Steel/Metal Coating Type Steel/Metal Coating Type
Appli
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F2325 − 03 (Reapproved 2009) F2325 − 14
Standard Classification for
Multi-Layer Steel (MLS) and Other Metal Layer Gaskets for
1
Transportation Applications
This standard is issued under the fixed designation F2325; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
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
2
2.1 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
2.2 SAE Standard:
3
SAE AE-13 Gasket and Joint Design Manual for Engine and Transmission Systems
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 active layer(s)—an embossed layer(s) used to provide the primary sealing function.
3.1.2 embossment (emboss)—a raised area of a steel or metal layer in relief from the rest of the layer with a defined geometry
typically used at the sealing interface. Embossments may also be used to shift load to areas, which require better sealing
4
performance.
3.1.3 exterior coating—a supplemental coating applied to the exterior of the gasket for anti-fret, anti-blocking, or sealing
enhancement.
3.1.4 inactive layer(s)—the flat or non-embossed layer(s) used for spacing or other purposes within the gasket.
3.1.5 load stop (stopper)—a device used to control compression on Single Layer Steel (SLS) or between layers in an MLS or
Metal Layer gasket.
1
This classification is under the jurisdiction of ASTM Committee F03 on Gaskets and is the direct responsibility of Subcommittee F03.10 on Composite Gaskets.
Current edition approved Oct. 1, 2009July 1, 2014. Published March 2010December 2014. Originally approved in 2003. Last previous edition approved in 20032009 as
F2325 – 03.F2325 – 03 (2009). DOI: 10.1520/F2325-03R09.10.1520/F2325-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001.
4
Load shifting reference from SAE AE-13, “Gasket and Joint Design Manual for Engine and Transmission Systems.”
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F2325 − 14
4. 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 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
...