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ASTM D6395-05

(Test Method)

Standard Test Method for Flatwise Flexural Impact Resistance of Rigid Plastics

Standard Test Method for Flatwise Flexural Impact Resistance of Rigid Plastics

SCOPE
1.1 The resistance of plastics to breakage by flexural shock may be determined by test methods such as those contained in Test Method D 256. Specimens used in those test methods feature a milled notch to promote brittle fracture. The test specimens are struck by a pendulum with the depth dimension parallel to the direction of pendulum swing. This test method is differentiated from the others by its application to the assessment of the affect on impact resistance of changes in the surface of specimens resulting from weathering or other exposure. In this test method, specimens are struck by a pendulum with the depth dimension perpendicular to the direction of pendulum swing. Test Method D 5420 may also be used to conduct testing of weathered or exposed specimens. This test method is differentiated from Gardner Impact by the smaller size of the specimens, which may result in substantially higher productivity of accelerated weathering instruments. Additionally, this test method provides multiple data from a single specimen for characterization of within specimen variability.
1.2 This test method describes the determination of the resistance of rigid plastic strip specimens to breakage or permanent deformation when one end of the specimen is subjected to an impact upon its wide face while the other end of the specimen is firmly clamped.
1.3 This test method is applicable to specimens of 1.60 mm [0.0625 in.] thickness. However, the limits of applicability of the test are not sharply defined, and specimens having other dimensions may frequently be used. For specimens of thicknesses other than 1.60 mm [0.0625 in.] the ratio of the distance between the top of the clamp and the centerline of the rounded striking edge to the specimen thickness must be 2.5 ± 0.1.
1.4 This test method measures the relative impact resistance of samples having approximately the same thickness. Normalization of the impact resistance to unit cross-sectional area only partly compensates for the effects of specimen thickness variation because, at the fixed cantilever length, the ratio of shear stress to tensile stress in bending increases with thickness, and the importance of these effects in contributing to the energy absorbed is greater for ductile than for brittle failure.
1.5 This test method is used primarily as a means of assessing, for a series of samples, changes relative to a control due to some treatment such as weathering or exposure to active environments. It has been particularly useful as a sensitive indicator of the development of surface cracks or a brittle surface. The existence or formation of cracks in an inherently brittle surface produces marked lowering of impact strength when that surface is the one subjected to tension in the test.
1.6 This test method is not generally applicable to materials such as elastomers or nonrigid plastics in which there is no fracture, permanent deformation, or other change due to yielding in flexure. However, it may be desirable to test such materials as file samples to establish reference points when the test is applied as described in 1.5.
1.7 The values stated in SI units are to be regarded as the standard. The values given in brackets are for information only.
1.8 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
There is no equivalent or similar ISO standard.

General Information

Status
Historical
Publication Date
31-Oct-2005
ICS
83.080.01 - Plastics in general
Technical Committee
D20 - Plastics
Drafting Committee
D20.10 - Mechanical Properties
Current Stage
Ref Project

Relations

Replaces
ASTM D6395-99 - Standard Test Method for Flatwise Flexural Impact Resistance of Rigid Plastics
Effective Date
01-Nov-2005
Replaced By
ASTM D6395-10 - Standard Test Method for Flatwise Flexural Impact Resistance of Rigid Plastics
Effective Date
01-Apr-2010

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ASTM D6395-05 - Standard Test Method for Flatwise Flexural Impact Resistance of Rigid PlasticsASTM D6395-05 - Standard Test Method for Flatwise Flexural Impact Resistance of Rigid Plastics
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ASTM D6395-05 - Standard Test Method for Flatwise Flexural Impact Resistance of Rigid Plastics
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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:D6395–05
Standard Test Method for
1
Flatwise Flexural Impact Resistance of Rigid Plastics
This standard is issued under the fixed designation D6395; 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* ness, and the importance of these effects in contributing to the
energy absorbed is greater for ductile than for brittle failure.
1.1 The resistance of plastics to breakage by flexural shock
1.5 This test method is used primarily as a means of
may be determined by test methods such as those contained in
assessing, for a series of samples, changes relative to a control
Test Method D256. Specimens used in those test methods
due to some treatment such as weathering or exposure to active
feature a milled notch to promote brittle fracture. The test
environments. It has been particularly useful as a sensitive
specimens are struck by a pendulum with the depth dimension
indicator of the development of surface cracks or a brittle
parallel to the direction of pendulum swing.This test method is
surface. The existence or formation of cracks in an inherently
differentiated from the others by its application to the assess-
brittle surface produces marked lowering of impact strength
ment of the affect on impact resistance of changes in the
when that surface is the one subjected to tension in the test.
surface of specimens resulting from weathering or other
1.6 This test method is not generally applicable to materials
exposure. In this test method, specimens are struck by a
such as elastomers or nonrigid plastics in which there is no
pendulum with the depth dimension perpendicular to the
fracture, permanent deformation, or other change due to
direction of pendulum swing. Test Method D5420 may also be
yielding in flexure. However, it may be desirable to test such
used to conduct testing of weathered or exposed specimens.
materials as file samples to establish reference points when the
This test method is differentiated from Gardner Impact by the
test is applied as described in 1.5.
smallersizeofthespecimens,whichmayresultinsubstantially
1.7 The values stated in SI units are to be regarded as the
higher productivity of accelerated weathering instruments.
standard.Thevaluesgiveninbracketsareforinformationonly.
Additionally, this test method provides multiple data from a
1.8 This standard does not purport to address all of the
single specimen for characterization of within specimen vari-
safety concerns, if any, associated with its use. It is the
ability.
responsibility of the user of this standard to establish appro-
1.2 This test method describes the determination of the
priate safety and health practices and determine the applica-
resistance of rigid plastic strip specimens to breakage or
bility of regulatory limitations prior to use.
permanent deformation when one end of the specimen is
subjected to an impact upon its wide face while the other end
NOTE 1—There is no equivalent or similar ISO standard.
of the specimen is firmly clamped.
2. Referenced Documents
1.3 This test method is applicable to specimens of 1.60 mm
2
[0.0625 in.] thickness. However, the limits of applicability of
2.1 ASTM Standards:
the test are not sharply defined, and specimens having other
D256 Test Methods for Determining the Izod Pendulum
dimensions may frequently be used. For specimens of thick-
Impact Resistance of Plastics
nesses other than 1.60 mm [0.0625 in.] the ratio of the distance
D618 Practice for Conditioning Plastics for Testing
between the top of the clamp and the centerline of the rounded
D883 Terminology Relating to Plastics
striking edge to the specimen thickness must be 2.5 6 0.1.
D5420 Test Method for Impact Resistance of Flat, Rigid
1.4 This test method measures the relative impact resistance
Plastic Specimen by Means of a Striker Impacted by a
of samples having approximately the same thickness. Normal-
Falling Weight (Gardner Impact)
izationoftheimpactresistancetounitcross-sectionalareaonly
D5947 Test Methods for Physical Dimensions of Solid
partly compensates for the effects of specimen thickness
Plastics Specimens
variation because, at the fixed cantilever length, the ratio of
3. Terminology
shear stress to tensile stress in bending increases with thick-
3.1 Definitions used in this test method are in accordance
with Terminology D883.
1
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
2
and is the direct responsibility of Subcommittee D20.10 on Mechanical Properties. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2005. Publishe
...

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1.1 This terminology covers definitions of technical terms used in the plastics industry. Terms that are generally understood or adequately defined in other readily available sources are not included.  
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1.5 For literature related to plastics terminology, see Appendix X1.  
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SIGNIFICANCE AND USE
4.1 Compression tests provide information about the compressive properties of plastics when employed under conditions approximating those under which the tests are made.  
4.2 Compressive properties include modulus of elasticity, yield stress, deformation beyond yield point, and compressive strength (unless the material merely flattens but does not fracture). Materials possessing a low order of ductility may not exhibit a yield point. In the case of a material that fails in compression by a shattering fracture, the compressive strength has a very definite value. In the case of a material that does not fail in compression by a shattering fracture, the compressive strength is an arbitrary one depending upon the degree of distortion that is regarded as indicating complete failure of the material. Many plastic materials will continue to deform in compression until a flat disk is produced, the compressive stress (nominal) rising steadily in the process, without any well-defined fracture occurring. Compressive strength can have no real meaning in such cases.  
4.3 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.  
4.4 Before proceeding with this test method, reference should be made to the ASTM specification for the material being tested. Any test specimen preparation, conditioning, dimensions, and testing parameters covered in the materials specification shall take precedence over those mentioned in this test method. If there is no material specification, then the default conditions apply. Table 1 in Classification D4000 lists the ASTM materials standards that currently exist.
SCOPE
1.1 This test method covers the determination of the mechanical properties of unreinforced and reinforced rigid plastics, including high-modulus composites, when loaded in compression at relatively low uniform rates of straining or loading. Test specimens of standard shape are employed. This procedure is applicable for a composite modulus up to and including 41,370 MPa (6,000,000 psi).  
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.
Note 1: For compressive properties of resin-matrix composites reinforced with oriented continuous, discontinuous, or cross-ply reinforcements, tests may be made in accordance with Test Method D3410/D3410M or D6641/D6641M.  
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. A specific precautionary statement is given in 13.1.
Note 2: This standard is equivalent to ISO 604.  
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.

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  • Standard
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ASTM
ASTM D1929-23(Test Method)
Standard Test Method for Determining Ignition Temperature of Plastics

SIGNIFICANCE AND USE
4.1 Tests made under conditions herein prescribed can be of considerable value in comparing the relative ignition characteristics of different materials. Values obtained represent the lowest ambient air temperature that will cause ignition of the material under the conditions of this test. Test values are expected to rank materials according to ignition susceptibility under actual use conditions.  
4.2 This test is not intended to be the sole criterion for fire hazard. In addition to ignition temperatures, fire hazards include other factors such as burning rate or flame spread, intensity of burning, fuel contribution, products of combustion, and others.
SCOPE
1.1 This fire test response test method2 covers a laboratory determination of the flash ignition temperature and spontaneous ignition temperature of plastics using a hot-air furnace.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 Caution—During the course of combustion, gases or vapors, or both, are evolved that have the potential to be hazardous to personnel.  
1.4 This standard is used to measure and describe the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire-hazard or fire-risk assessment of the materials, products, or assemblies under actual fire conditions.  
1.5 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests.  
1.6 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. Specific precautionary statements are given in 1.3 and 1.4.
Note 1: This test method and ISO 871-2022 (Option 1) are similar in all technical details.  
1.7 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.

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  • Standard
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