ASTM D1621-04a

Standard Test Method for Compressive Properties Of Rigid Cellular Plastics

SIGNIFICANCE AND USE
This test method provides information regarding the behavior of cellular materials under compressive loads. Test data is obtained, and from a complete load-deformation curve it is possible to compute the compressive stress at any load (such as compressive stress at proportional-limit load or compressive strength at maximum load) and to compute the effective modulus of elasticity.
Compression tests provide a standard method of obtaining data for research and development, quality control, acceptance or rejection under specifications, and special purposes. The tests cannot be considered significant for engineering design in applications differing widely from the load - time scale of the standard test. Such applications require additional tests such as impact, creep, and fatigue.
Before proceeding with this test method, reference shall be made to the specification of the material being tested. Any test specimen preparation, conditioning, dimensions, or testing parameters, or a combination thereof, covered in the materials specification shall take precedence over those mentioned in this test method. If there are no material specifications, then the default conditions apply.
SCOPE
1.1 This test method describes a procedure for determining the compressive properties of rigid cellular materials, particularly expanded plastics.
1.2 The values stated in SI units are to be regarded as the standard. The values in brackets are for information only.
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 limitations prior to use.
Note 1—This test method and ISO 844 are technically equivalent.

General Information

• Status: Historical
• Publication Date: 30-Sep-2004
• ICS: 83.100 - Cellular materials
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.22 - Cellular Materials - Plastics and Elastomers

Relations

• Replaces: ASTM D1621-04 - Standard Test Method for Compressive Properties Of Rigid Cellular Plastics
• Effective Date: 01-Oct-2004
• Replaced By: ASTM D1621-10 - Standard Test Method for Compressive Properties Of Rigid Cellular Plastics
• Effective Date: 01-Apr-2010
• Referred By: ASTM E1730-19 - Standard Specification for Rigid Foam for Use in Structural Sandwich Panel Cores
• Effective Date: 01-Oct-2004
• Referred By: ASTM C1847-21 - Standard Specification for Direct Buried Pre-Insulated and Jacketed Polyurethane Bonded Low Temperature Hot Water Piping Systems
• Effective Date: 01-Oct-2004
• Referred By: ASTM F3510-21 - Standard Guide for Characterizing Fiber-Based Constructs for Tissue-Engineered Medical Products
• Effective Date: 01-Oct-2004
• Referred By: ASTM D7119/D7119M-21 - Standard Guide for Sampling Spray Polyurethane Foam and Coating in Roofing
• Effective Date: 01-Oct-2004
• Referred By: ASTM F561-19 - Standard Practice for Retrieval and Analysis of Medical Devices, and Associated Tissues and Fluids
• Effective Date: 01-Oct-2004
• Referred By: ASTM C1594-23 - Standard Specification for Polyimide Rigid Cellular Thermal Insulation
• Effective Date: 01-Oct-2004
• Referred By: ASTM C1696-20 - Standard Guide for Industrial Thermal Insulation Systems
• Effective Date: 01-Oct-2004
• Referred By: ASTM F3319-20 - Standard Specification for Selection and Application of Field-Installed Cryogenic Pipe and Equipment Insulation Systems on Liquefied Natural Gas (LNG)-Fueled Ships
• Effective Date: 01-Oct-2004
• Referred By: ASTM F755-19 - Standard Specification for Selection of Porous Polyethylene for Use in Surgical Implants
• Effective Date: 01-Oct-2004
• Referred By: ASTM D6817/D6817M-17(2021) - Standard Specification for Rigid Cellular Polystyrene Geofoam
• Effective Date: 01-Oct-2004
• Referred By: ASTM D7826-23a - Standard Guide for Evaluation of New Aviation Gasolines and New Aviation Gasoline Additives
• Effective Date: 01-Oct-2004
• Referred By: ASTM F1839-08(2021) - Standard Specification for Rigid Polyurethane Foam for Use as a Standard Material for Testing Orthopaedic Devices and Instruments
• Effective Date: 01-Oct-2004
• Referred By: ASTM C578-22 - Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation
• Effective Date: 01-Oct-2004

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:D1621–04a
Standard Test Method for
1
Compressive Properties of Rigid Cellular Plastics
This standard is issued under the fixed designation D1621; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 3.1.1 compliance—thedisplacementdifferencebetweentest
machinedrivesystemdisplacementvaluesandactualspecimen
1.1 This test method describes a procedure for determining
displacement.
the compressive properties of rigid cellular materials, particu-
3.1.2 compliance correction—an analytical method of
larly expanded plastics.
modifying test instrument displacement values to eliminate the
1.2 The values stated in SI units are to be regarded as the
amount of that measurement attributed to test instrument
standard. The values in brackets are for information only.
compliance.
1.3 This standard does not purport to address all of the
3.1.3 compressive deformation—the decrease in length pro-
safety concerns, if any, associated with its use. It is the
duced in the gage length of the test specimen by a compressive
responsibility of the user of this standard to establish appro-
load expressed in units of length.
priate safety and health practices and determine the applica-
3.1.4 compressive strain—the dimensionless ratio of com-
bility of regulatory limitations prior to use.
pressive deformation to the gage length of the test specimen or
NOTE 1—This test method and ISO 844 are technically equivalent.
the change in length per unit of original length along the
longitudinal axis.
2. Referenced Documents
3.1.5 compressive strength—the stress at the yield point if a
2
2.1 ASTM Standards:
yield point occurs before 10 % deformation (as in Fig. 1a) or,
D618 Practice for Conditioning Plastics for Testing
in the absence of such a yield point, the stress at 10 %
E4 Practices for Force Verification of Testing Machines
deformation (as in Fig. 1b).
E83 Practice for Verification and Classification of Exten-
3.1.6 compressive stress (nominal)—the compressive load
someter Systems
perunitareaofminimumoriginalcrosssectionwithinthegage
E691 Practice for Conducting an Interlaboratory Study to
boundaries, carried by the test specimen at any given moment,
Determine the Precision of a Test Method
expressed in force per unit area.
2.2 ISO Standard:
3.1.7 compressive stress-strain diagram—a diagram in
ISO 844 Cellular Plastics—Compression Test of Rigid Ma-
which values of compressive stress are plotted as ordinates
3
terials
against corresponding values of compressive strain as abscis-
sas.
3. Terminology
3.1.8 compressive yield point—the first point on the stress-
3.1 Definitions:
strain diagram at which an increase in strain occurs without an
increase in stress.
1
3.1.9 deflectometer—a device used to sense the compres-
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
and is the direct responsibility of Subcommittee D20.22 on Cellular Materials -
sive deflection of the specimen by direct measurement of the
Plastics and Elastomers.
distance between the compression platens.
Current edition approved Oct. 1, 2004. Published October 2004. Originally
3.1.10 displacement—compression platen movement after
approved in 1959. Last previous edition approved in 2004 as D1621 - 04. DOI:
10.1520/D1621-04A. the platens contact the specimen, expressed in millimetres or
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
inches.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3.1.11 gage length—the initial measured thickness of the
Standards volume information, refer to the standard’s Document Summary page on
test specimen expressed in units of length.
the ASTM website.
3
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D1621–04a
X = 10 % CORE DEFORMATION
1
X = DEFLECTION (APPROXIMATELY 13 %)
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FIG. 1 a Compressive Strength (See 3.1.5 and Section 9) FIG. 1 b Compressive Strength (See 3.1.5 and Section 9)
3.1.12 modulus of elasticity—theratioofstress(nominal)to system for imparting to the movable member (crosshead), a
corresponding strain below the proportional limit of a material uniform, controlled velocity with respect to the stationary
expressed in force per unit area based
...