ASTM F806-99a(2003)e1

Standard Test Method for Compressibility and Recovery of Laminated Composite Gasket Materials

SIGNIFICANCE AND USE
This test method is designed to compare related laminated composite gasket materials under controlled conditions and their short-time compressibility and recovery at room temperature. It measures compressibility with a matched pair of opposing upper and lower penetrators which provide better precision and bias than methods using an upper penetrator and a lower anvil. It is difficult to prepare undistorted test specimens from laminated composite gasket materials which will lay flat on an anvil. Also, with many composites having rigid inner layers the load on the upper penetrator is distributed over the bottom anvil area resulting in a lower than actual compressibility reading. This test method may be used as a routine test method when agreed upon between the purchaser and the producer.
SCOPE
1.1 This test method covers determination of the short-time compressibility and recovery at room temperature of laminated composite gasket materials.  
1.2 This test method is not intended as a test for compressibility under prolonged stress application, that is "creep," or for recovery following such prolonged stress application, the inverse of which is generally referred to as "compression set." Also, it is only intended for tests at room temperature.  
1.3 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.  
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Sep-2003
• ICS: 21.140 - Seals, glands
• Technical Committee: F03 - Gaskets
• Drafting Committee: F03.20 - Mechanical Test Methods

Relations

• Replaces: ASTM F806-99a(2003) - Standard Test Method for Compressibility and Recovery of Laminated Composite Gasket Materials
• Effective Date: 01-Oct-2003
• Replaced By: ASTM F806-99a(2009) - Standard Test Method for Compressibility and Recovery of Laminated Composite Gasket Materials
• Effective Date: 01-Oct-2009

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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.
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Designation:F806–99a (Reapproved 2003)
Standard Test Method for
Compressibility and Recovery of Laminated Composite
Gasket Materials
ThisstandardisissuedunderthefixeddesignationF806;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
´ NOTE—Adjunct reference was corrected editorially in April 2006.
1. Scope of opposing upper and lower penetrators which provide better
precision and bias than methods using an upper penetrator and
1.1 This test method covers determination of the short-time
a lower anvil. It is difficult to prepare undistorted test speci-
compressibility and recovery at room temperature of laminated
mens from laminated composite gasket materials which will
composite gasket materials.
lay flat on an anvil. Also, with many composites having rigid
1.2 This test method is not intended as a test for compress-
inner layers the load on the upper penetrator is distributed over
ibilityunderprolongedstressapplication,thatis“creep,”orfor
the bottom anvil area resulting in a lower than actual com-
recovery following such prolonged stress application, the
pressibility reading. This test method may be used as a routine
inverse of which is generally referred to as “compression set.”
test method when agreed upon between the purchaser and the
Also, it is only intended for tests at room temperature.
producer.
1.3 The values stated in SI units are to be regarded as the
standard. The inch-pound units given in parentheses are for
4. Apparatus
information only.
4.1 The testing machine shall consist of the following
1.4 This standard does not purport to address all of the
components.
safety concerns, if any, associated with its use. It is the
4.1.1 Penetrators—A matched pair of opposing steel cylin-
responsibility of the user of this standard to establish appro-
ders (within 6 0.025 mm (0.001 in.)) specified for the type of
priate safety and health practices and determine the applica-
material being tested, with the cylinder ends hardened and
bility of regulatory limitations prior to use.
ground. Penetrator diameters for various types of laminated
2. Referenced Documents composite gasket materials are shown in Table 1.
4.1.2 Dial—An indicating dial, or dials, graduated in 0.025
2.1 ASTM Standards:
mm (0.001 in.) to show the thickness of the specimen during
F104 Classification System for Nonmetallic Gasket Mate-
the test. Readings shall be estimated to the nearest 0.0025 mm
rials
(0.0001 in.).
2.2 ASTM Adjuncts:
3 4.1.3 Preload, shall include the weight of the penetrator
Testing Machine Drawings
itself and added weights to give the value specified within 6
3. Significance and Use 1 %. A 22.2-N (5-lbf) preload shall be used.
4.1.4 Loading Device—A device for applying a specified
3.1 This test method is designed to compare related lami-
major load to the upper end of the penetrator, which may
nated composite gasket materials under controlled conditions
consist of an arrangement of dead weights, a hydraulic cylin-
and their short-time compressibility and recovery at room
der, an air cylinder, or any other device capable of applying the
temperature. It measures compressibility with a matched pair
major load at a slow uniform rate and to an accuracy of 61%.
The major load shall be in addition to the specified preload.
Major loads for various types of laminated composite gasket
This test method is under the jurisdiction ofASTM Committee F03 on Gaskets
and is the direct responsibility of Subcommittee F03.20 on Mechanical Test materials are shown in Table 1.
Methods.
Current edition approved Oct. 1, 2003. Published October 2003. Originally
5. Test Specimen
approved in 1983. Last previous edition approved in 1999 as F806 – 99a. DOI:
5.1 The test specimen may be either circular or rectangular
10.1520/F0806-99AR03E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
in shape. The minimum size shall be 12.7 mm (0.5 in.) larger
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 4
Available from ASTM International Headquarters. Order Adjunct No. Alistofrecommendedsuppliers,bySubcommitteeF03.20,isavailablethrough
ADJF0806. Original adjunct produced in 1983. ASTM.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F806–99a (2003)
TABLE 1 Conditioning and Test Loads for Laminated Composite Gasket Materials
NOTE—If the nonmetallic layers of the laminated composite are not all the same material, then the test loads may be as agreed upon between the
producer and user.
F104
Total Load (sum of Major Load
A
Type of Gasket Mate- Identification
and Preload)
Proce- Penetrator Major Load,
rial in the Nonmetallic First Two Conditioning Procedure Preload,
dure Diameter, mm (in.) N (lbf)
Layers Numerals of Six- N (lbf)
N (lbf) MPa (psi)
Digit Number
A compressed asbestos F11, F12, 1hat100 6 2°C (212 6 3.6°F); 6.4 (0.252) 22.2 (5) 1090 (245) 1112 (250) 34.5 (5000)
sheet; asbestos beater F51, F52 cool in desiccator over anhydrous
sheet; flexible graphite calcium chloride 21 to 30°C (70
to 85°F)
H asbestos paper and F13 4 h at 100 6 2°C (2126 3.6°F); 6.4 (0.252) 22.2 (5) 1090 (245) 1112 (250) 34.5 (5000)
millboard cool as in Procedure A
F cork composition, cork F21,
...