ASTM D6779-04
(Classification)Standard Classification System for Polyamide Molding and Extrusion Materials (PA)
Standard Classification System for Polyamide Molding and Extrusion Materials (PA)
SCOPE
1.1 This classification system covers polyamide materials suitable for molding and extrusion. Some of these compositions are also suitable for application from solution.
1.2 This classification system allows for the use of recycled polyamide materials provided that the requirements as stated in this classification system are met. The proportions of recycled material used, as well as the nature and amount of any contaminant, however, cannot be covered practically in this specification.
1.3 The properties included in this classification system are those required to identify the compositions covered. There may be other requirements necessary to identify particular characteristics important to specialized applications. These may be specified by using the suffixes as given in Section .
1.4 This classification system and subsequent line callout (specification) are intended to provide a means of calling out plastic materials used in the fabrication of end items or parts. It is not intended for the selection of materials. Material selection should be made by those having expertise in the plastic field after careful consideration of the design and the performance required of the part, the environment to which it will be exposed, the fabrication process to be employed, the costs involved, and the inherent properties of the material other than those covered by this classification system.
1.5 The values stated in SI units are to be regarded as the standard.
The following precautionary caveat pertains only to the test methods portion, Section , of this classification system. 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.Note 1
This classification system is similar to ISO 1874-1/-2 1993, although the technical content is significantly different.
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Designation: D 6779 – 04
Standard Classification System for
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Polyamide Molding and Extrusion Materials (PA)
This standard is issued under the fixed designation D 6779; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope* 2. Referenced Documents
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1.1 This classification system covers polyamide materials 2.1 ASTM Standards:
suitable for molding and extrusion. Some of these composi- D 257 Test Methods for D-C Resistance or Conductance of
tions are also suitable for application from solution. Insulating Materials
1.2 This classification system allows for the use of recycled D 789 Test Methods for Determination of Relative Viscos-
polyamidematerialsprovidedthattherequirementsasstatedin ity and Moisture Content of Polyamide (PA)
this classification system are met. The proportions of recycled D 792 TestMethodsforDensityandSpecificGravity(Rela-
material used, as well as the nature and amount of any tive Density) of Plastics by Displacement
contaminant, however, cannot be covered practically in this D 883 Terminology Relating to Plastics
specification. D 1600 Terminology for Abbreviated Terms Relating to
1.3 The properties included in this classification system are Plastics
thoserequiredtoidentifythecompositionscovered.Theremay D 3892 Practice for Packaging/Packing of Plastics
be other requirements necessary to identify particular charac- D 4000 Classification System for Specifying Plastic Mate-
teristics important to specialized applications. These may be rials
specified by using the suffixes as given in Section 5. D 6260 Test Method for Gravimetric Determination of Car-
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1.4 This classification system and subsequent line callout bon Black in Nylon Materials (PA)
(specification) are intended to provide a means of calling out E 29 Practice for Using Significant Digits in Test Data to
plastic materials used in the fabrication of end items or parts. Determine Conformance with Specifications
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It is not intended for the selection of materials. Material 2.2 IEC/ISO Standards:
selection should be made by those having expertise in the IEC 60243-1:1998 Electrical Strength of Insulating
plastic field after careful consideration of the design and the Materials—Test Methods—Part 1: Tests at Power Fre-
performance required of the part, the environment to which it quencies
will be exposed, the fabrication process to be employed, the IEC 60250:1969 Recommended Methods for the Determi-
costsinvolved,andtheinherentpropertiesofthematerialother nation of the Permittivity and Dielectric Dissipation Fac-
than those covered by this classification system. tor of Electrical Insulating Materials at Power, Audio and
1.5 The values stated in SI units are to be regarded as the Radio Frequencies Including Metre Wavelengths
standard. ISO 75-1:1993 Plastics—Determination of Temperature of
1.6 The following precautionary caveat pertains only to the Deflection Under Load—Part 1: General Test Methods
test methods portion, Section 11, of this classification system. ISO 75-2:1993 Plastics—Determination of Temperature of
This standard does not purport to address all of the safety Deflection Under Load—Part 2: Plastic and Ebonite
concerns, if any, associated with its use. It is the responsibility ISO 179-1:2000 Plastics—Determination of Charpy Impact
of the user of this standard to establish appropriate safety and Strength—Part 1: Non-instrumented Impact Test
health practices and determine the applicability of regulatory ISO 294-1:1996 Plastics—Injection Moulding of Test
requirements prior to use. Specimens of Thermoplastic Materials—Part 1: General
Principles, Multipurpose-Test Specimens and Bars
NOTE 1—This classification system is similar to ISO 1874-1/-2 1993,
although the technical content is significantly different.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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ThisclassificationsystemisunderthejurisdictionofASTMCommitteeD20on Standards volume information, refer to the standard’s Document Summary page on
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic the ASTM website.
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Materials (Section D20.15.09). Withdrawn.
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Current edition approved October 1, 2004. Published October 2004. Originally Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
approved in 2002. Last previous edition approved in 2003 as D 6779 - 03. 4th Floor, New York, NY 10036.
*A Summary of Changes section appears at the end of this standard.
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