ASTM D6779-21

Standard Classification System for and Basis of Specification 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 The properties included in this classification system are those required to identify the compositions covered. Other requirements necessary to identify particular characteristics important to specialized applications are to be specified by using suffixes as given in Section 5.  
1.3 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 can 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.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 The following precautionary caveat pertains only to the test methods portion, Section 11, 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: This classification system is similar to ISO 16396-1/-2,
although the technical content is significantly different.  
1.6 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.

General Information

• Status: Historical
• Publication Date: 30-Jun-2021
• ICS: 83.140.01 - Rubber and plastics products in general
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.15 - Thermoplastic Materials

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D6779 − 21
Standard Classification System for and Basis of Specification for
1
Polyamide Molding and Extrusion Materials (PA)
This standard is issued under the fixed designation D6779; 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 U.S. Department of Defense.
1. Scope* Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.1 This classification system covers polyamide materials
Barriers to Trade (TBT) Committee.
suitable for molding and extrusion. Some of these composi-
tions are also suitable for application from solution.
2. Referenced Documents
1.2 The properties included in this classification system are
2
2.1 ASTM Standards:
those required to identify the compositions covered. Other
D257 Test Methods for DC Resistance or Conductance of
requirements necessary to identify particular characteristics
Insulating Materials
important to specialized applications are to be specified by
D789 Test Method for Determination of Relative Viscosity
using suffixes as given in Section 5.
of Concentrated Polyamide (PA) Solutions
1.3 This classification system and subsequent line callout
D792 Test Methods for Density and Specific Gravity (Rela-
(specification) are intended to provide a means of calling out
tive Density) of Plastics by Displacement
plastic materials used in the fabrication of end items or parts.
D883 Terminology Relating to Plastics
It is not intended for the selection of materials. Material
D1600 Terminology for Abbreviated Terms Relating to Plas-
selection can be made by those having expertise in the plastic
tics
field after careful consideration of the design and the perfor-
D3892 Practice for Packaging/Packing of Plastics
mance required of the part, the environment to which it will be
D4000 Classification System for Specifying Plastic Materi-
exposed, the fabrication process to be employed, the costs
als
involved, and the inherent properties of the material other than
D5740 Guide for Writing Material Standards in the Classi-
those covered by this classification system.
fication Format
D6260 Test Method for Gravimetric Determination of Car-
1.4 The values stated in SI units are to be regarded as
3
bon Black in Nylon Materials (PA) (Withdrawn 2004)
standard. No other units of measurement are included in this
D7209 Guide for Waste Reduction, Resource Recovery, and
standard.
Use of Recycled Polymeric Materials and Products (With-
1.5 The following precautionary caveat pertains only to the
3
drawn 2015)
test methods portion, Section 11, of this classification system.
E29 Practice for Using Significant Digits in Test Data to
This standard does not purport to address all of the safety
Determine Conformance with Specifications
concerns, if any, associated with its use. It is the responsibility
4
2.2 IEC/ISO Standards:
of the user of this standard to establish appropriate safety,
IEC 60243-1 Electrical Strength of Insulating Materials—
health, and environmental practices and determine the appli-
Test Methods—Part 1: Tests at Power Frequencies
cability of regulatory limitations prior to use.
IEC 60250 Recommended Methods for the Determination of
NOTE 1—This classification system is similar to ISO 16396-1 ⁄-2,
the Permittivity and Dielectric Dissipation Factor of
although the technical content is significantly different.
Electrical Insulating Materials at Power, Audio and Radio
1.6 This international standard was developed in accor-
Frequencies Including Metre Wavelengths
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
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
1
This classification system is under the jurisdiction of ASTM Committee D20 on 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.
3
Materials. The last approved version of this historical standard is referenced on
Current edition approved July 1, 2021. Published July 2021. Originally approved www.astm.org.
4
in 2002. Last previous edition approved in 2020 as D6779 - 20. DOI: 10.1520/ Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
D6779-21. 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM Internat
...

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: D6779 − 20 D6779 − 21
Standard Classification System for and Basis of Specification for
1
Polyamide Molding and Extrusion Materials (PA)
This standard is issued under the fixed designation D6779; 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 U.S. Department of Defense.
1. 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 The properties included in this classification system are those required to identify the compositions covered. Other
requirements necessary to identify particular characteristics important to specialized applications are to be specified by using
suffixes as given in Section 5.
1.3 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 can 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.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 The following precautionary caveat pertains only to the test methods portion, Section 11, 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, health, and environmental practices and determine the applicability of regulatory
limitations prior to use.
NOTE 1—This classification system is similar to ISO 1874-1ISO 16396-1 ⁄-2,
although the technical content is significantly different.
1.6 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D257 Test Methods for DC Resistance or Conductance of Insulating Materials
D789 Test Method for Determination of Relative Viscosity of Concentrated Polyamide (PA) Solutions
1
This classification system is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
Materials.
Current edition approved July 1, 2020July 1, 2021. Published July 2020July 2021. Originally approved in 2002. Last previous edition approved in 20172020 as D6779
- 17.- 20. DOI: 10.1520/D6779-20.10.1520/D6779-21.
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.
*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
1

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D6779 − 21
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D883 Terminology Relating to Plastics
D1600 Terminology for Abbreviated Terms Relating to Plastics
D3892 Practice for Packaging/Packing of Plastics
D4000 Classification System for Specifying Plastic Materials
D5740 Guide for Writing Material Standards in the Classification Format
3
D6260 Test Method for Gravimetric Determination of Carbon Black in Nylon Materials (PA) (Withdrawn 2004)
D7209 Guide for Waste Reduction, Resource Recovery, and Use of Recycled Polymeric Materials and Products (Withdrawn
3
2015)
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
4
2.2 IEC/ISO Standards:
IEC 60243-1 Electrical Strength of Insulating Materials—Test Meth
...