ASTM D6779-23

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.
Note 2: The materials covered by this classification system include a subset of polyamides defined as polyphthalamides (PPA) as in 3.2.1, some of which are also classified in ASTM D5336. Specifically, groups 7, 10, 12, 13, 14, 15 and 17 in this standard are PPA materials. ASTM D5336 gives further details relating to groups 10, 12 and 13.  
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: Published
• Publication Date: 14-Mar-2023
• ICS: 83.140.01 - Rubber and plastics products in general
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.15 - Thermoplastic Materials

Standards Content (Sample)

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.
Designation: D6779 − 23
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.
subset of polyamides defined as polyphthalamides (PPA) as in 3.2.1, some
1. Scope*
of which are also classified in ASTM D5336. Specifically, groups 7, 10,
1.1 This classification system covers polyamide materials
12, 13, 14, 15 and 17 in this standard are PPA materials. ASTM D5336
suitable for molding and extrusion. Some of these composi- gives further details relating to groups 10, 12 and 13.
tions are also suitable for application from solution.
1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.2 The properties included in this classification system are
ization established in the Decision on Principles for the
those required to identify the compositions covered. Other
Development of International Standards, Guides and Recom-
requirements necessary to identify particular characteristics
mendations issued by the World Trade Organization Technical
important to specialized applications are to be specified by
Barriers to Trade (TBT) Committee.
using suffixes as given in Section 5.
1.3 This classification system and subsequent line callout
2. Referenced Documents
(specification) are intended to provide a means of calling out
2
2.1 ASTM Standards:
plastic materials used in the fabrication of end items or parts.
D257 Test Methods for DC Resistance or Conductance of
It is not intended for the selection of materials. Material
Insulating Materials
selection can be made by those having expertise in the plastic
D789 Test Method for Determination of Relative Viscosity
field after careful consideration of the design and the perfor-
of Concentrated Polyamide (PA) Solutions
mance required of the part, the environment to which it will be
D792 Test Methods for Density and Specific Gravity (Rela-
exposed, the fabrication process to be employed, the costs
tive Density) of Plastics by Displacement
involved, and the inherent properties of the material other than
D883 Terminology Relating to Plastics
those covered by this classification system.
D1600 Terminology for Abbreviated Terms Relating to Plas-
1.4 The values stated in SI units are to be regarded as
tics
standard. No other units of measurement are included in this
D3892 Practice for Packaging/Packing of Plastics
standard.
D4000 Classification System for Specifying Plastic Materi-
1.5 The following precautionary caveat pertains only to the
als
test methods portion, Section 11, of this classification system.
D5336 Classification System and Basis for Specification for
This standard does not purport to address all of the safety
Polyphthalamide (PPA) Injection Molding Materials
concerns, if any, associated with its use. It is the responsibility
D5740 Guide for Writing Material Standards in the Classi-
of the user of this standard to establish appropriate safety,
fication Format
health, and environmental practices and determine the appli-
D6260 Test Method for Gravimetric Determination of Car-
3
cability of regulatory limitations prior to use.
bon Black in Nylon Materials (PA) (Withdrawn 2004)
D7209 Guide for Waste Reduction, Resource Recovery, and
NOTE 1—This classification system is similar to ISO 16396-1 ⁄-2,
Use of Recycled Polymeric Materials and Products (With-
although the technical content is significantly different.
3
NOTE 2—The materials covered by this classification system include a
drawn 2015)
1 2
This classification system is under the jurisdiction of ASTM Committee D20 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Materials. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved March 15, 2023. Published March 2023. Originally the ASTM website.
3
approved in 2002. Last previous edition approved in 2021 as D6779 - 21. DOI: The last approved version of this historical standard is referenced on
10.1520/D6779-23. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyrigh
...

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 − 21 D6779 − 23
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 16396-1 ⁄-2,
although the technical content is significantly different.
NOTE 2—The materials covered by this classification system include a subset of polyamides defined as polyphthalamides (PPA) as in 3.2.1, some of which
are also classified in ASTM D5336. Specifically, groups 7, 10, 12, 13, 14, 15 and 17 in this standard are PPA materials. ASTM D5336 gives further details
relating to groups 10, 12 and 13.
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.
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, 2021March 15, 2023. Published July 2021March 2023. Originally approved in 2002. Last previous edition approved in 20202021 as
D6779 - 20. DOI: 10.1520/D6779-21.- 21. DOI: 10.1520/D6779-23.
*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 − 23
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
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
D5336 Classification System and Basis for Specification for Polyphthalamide (PPA) Injection Molding Materials
D5740 Guide for Writing Material Standards in the Classification D4000 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 (With
...