1、Designation: D6779 16D6779 17Standard Classification System for and Basis of Specification forPolyamide Molding and Extrusion Materials (PA)1This standard is issued under the fixed designation D6779; the number immediately following the designation indicates the year oforiginal adoption or, in the c
2、ase of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript 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 Th
3、is classification system covers polyamide materials suitable for molding and extrusion. Some of these compositions arealso suitable for application from solution.1.2 The properties included in this classification system are those required to identify the compositions covered. Otherrequirements neces
4、sary to identify particular characteristics important to specialized applications are to be specified by usingsuffixes as given in Section 5.1.3 This classification system and subsequent line callout (specification) are intended to provide a means of calling out plasticmaterials used in the fabricat
5、ion of end items or parts. It is not intended for the selection of materials. Material selection can bemade by those having expertise in the plastic field after careful consideration of the design and the performance required of thepart, the environment to which it will be exposed, the fabrication p
6、rocess to be employed, the costs involved, and the inherentproperties 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 c
7、aveat pertains only to the test methods portion, Section 11, of this classification system. Thisstandard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and health practices
8、and determine the applicability of regulatory requirementsprior to use.NOTE 1This classification system is similar to ISO 1874-1 -2,although the technical content is significantly different.2. Referenced Documents2.1 ASTM Standards:2D257 Test Methods for DC Resistance or Conductance of Insulating Ma
9、terialsD789 Test Methods for Determination of Solution Viscosities of Polyamide (PA)D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by DisplacementD883 Terminology Relating to PlasticsD1600 Terminology for Abbreviated Terms Relating to PlasticsD3892 Practice for Pac
10、kaging/Packing of PlasticsD4000 Classification System for Specifying Plastic MaterialsD5740 Guide for Writing Material Standards in the Classification FormatD6260 Test Method for Gravimetric Determination of Carbon Black in Nylon Materials (PA) (Withdrawn 2004)3D7209 Guide for Waste Reduction, Resou
11、rce Recovery, and Use of Recycled Polymeric Materials and Products (Withdrawn2015)3E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications2.2 IEC/ISO Standards:4IEC 60243-1 Electrical Strength of Insulating MaterialsTest MethodsPart 1: Tests at Power Frequ
12、enciesIEC 60250 Recommended Methods for the Determination of the Permittivity and Dielectric Dissipation Factor of Electrical1 This classification system is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials.Curr
13、ent edition approved May 1, 2016March 1, 2017. Published May 2016March 2017. Originally approved in 2002. Last previous edition approved in 20122016 as D6779- 12a.- 16. DOI: 10.1520/D6779-16.10.1520/D6779-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer
14、 Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 The last approved version of this historical standard is referenced on www.astm.org.4 Available from American National Standards Institute (ANSI), 25 W
15、. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.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. Becauseit may not be technically possible to adequately depict all ch
16、anges accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 B
17、arr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1Insulating Materials at Power, Audio and Radio Frequencies Including Metre WavelengthsISO 75-1 PlasticsDetermination of Temperature of Deflection Under LoadPart 1: General Test MethodsISO 75-2 PlasticsDetermination of Tem
18、perature of Deflection Under LoadPart 2: Plastic and EboniteISO 179-1 PlasticsDetermination of Charpy Impact StrengthPart 1: Non-instrumented Impact TestISO 294-1 PlasticsInjection Moulding of Test Specimens of Thermoplastic MaterialsPart 1: General Principles,Multipurpose-Test Specimens and BarsISO
19、 307 Determination of Viscosity Number of Polyamides In Dilute SolutionsISO 527-1 PlasticsDetermination of Tensile PropertiesPart 1: General PrinciplesISO 527-2 PlasticsDetermination of Tensile PropertiesPart 2: Testing ConditionsISO 1183 PlasticsMethods for Determining the Density and Relative Dens
20、ity of Non-Cellular PlasticsISO 1874-1 PlasticsPolyamide (PA) Homopolymers and Copolymers for Moulding and ExtrusionPart 1: DesignationISO 1874-2.2 PlasticsPolyamide (PA) Homopolymers and Copolymers for Moulding and ExtrusionPart 2: Preparation ofTest Specimens and Determination of PropertiesISO 316
21、7 Plastics, Multipurpose Test SpecimensISO 3451-4 PlasticsDetermination of AshPart 4: PolyamidesISO 11357-1 PlasticsDifferential Scanning CalorimetryPart 1: General PrinciplesISO 11357-3 PlasticsDifferential Scanning CalorimetryPart 3: Determination of Temperature and Enthalpy of Melting andCrystall
22、izationISO 15512 PlasticsDetermination of Water Content3. Terminology3.1 The terminology used in this classification system is in accordance with Terminologies D883 and D1600.4. Classification4.1 Polyamide materials are classified into groups in accordance with their composition. These groups are su
23、bdivided intoclasses and grades as shown in the Basic Property Table (Table PA).NOTE 2An example of this classification system for unreinforced polyamide is given as follows: The designation PA0123 indicates the following:PA = polyamide as found in Terminology D1600,01 (group) = polyamide 66,2 (clas
24、s) = heat stabilized, and3 (grade) = with a minimum viscosity number of 210 and the requirements given in Table PA.4.1.1 Grades of reinforced or filled versions, or both, of the basic materials are identified by a single letter that indicates thereinforcement or filler used and two digits, in multip
25、les of 5, that indicate the nominal quantity in percent by weight. Thus, a letterdesignation G for glass reinforced and 35 for percent or reinforcement, G35, specifies a material with a nominal glass level of35 %. The reinforcement letter designations and associated tolerance levels are shown as fol
26、lows:Symbol MaterialTolerance(Based on the TotalMass)C carbon- and graphite-fiber-reinforced2 %G glass-reinforced 2 %L lubricants (such as PTFE,graphite,silicone, and molybdenumdisulfide)Depends upon materialandprocessto be specified.M mineral-reinforced 2 %R combinations of reinforcements orfillers
27、, or both3 %NOTE 3An example of this classification system for reinforced polyamide is given as follows: The designation PA012G35 indicates the following:PA = polyamide as found in Terminology D1600,01 (group) = polyamide 66,2 (class) = heat stabilized, andG35 (grade) = nominal 35 % glass with the r
28、equirements given in Table PA.NOTE 4This part of the classification system uses percent of reinforcements or additives, or both, in the callout of the modified basic material. Thetypes and percentages of reinforcements and additives are sometimes shown on the suppliers technical data sheet. If neces
29、sary, additional control of thesereinforcements and additives can be accomplished by use of the suffix part of the system (see Section 5).NOTE 5Materials containing reinforcements or fillers, or both, at nominal levels not in multiples of 5 are included in the nearest PAgrade designation.For example
30、, a material with a nominal glass fiber level of 33 % is included with Grade G35 as shown in Note 4.NOTE 6Ash content of filled or reinforced materials is determined using Test Method ISO 3451-4.D6779 1724.2 Variations of polyamide materials that are not in Table PA are classified in accordance with
31、 Tables PA and A or B. TablePA is used to specify the group of polyamide and Table A or B is used to specify property requirements.4.2.1 Specific requirements for variations of polyamide materials shall be shown by a six-character designator. The designationwill consist of the letter “A” or “B” and
32、the five digits comprising the cell numbers for the property requirements in the order asthey appear in Tables A and B.4.2.1.1 Although the values listed are necessary to include the range of properties available in existing materials, not everypossible combination of the properties exists or can be
33、 obtained.4.2.2 When the grade of the basic material is not known, is not important or does not meet the Table PA requirements, the useof “0” grade classification shall be used for reinforced materials in this classification system.NOTE 7An example of this classification system for a reinforced poly
34、amide material is given as follows. The designation PA0110G30A42270 wouldindicate the following material requirements:PA0110 = Polyamide 66, from Table PA,G30 = Glass reinforced at 30 % nominal,A = Table A property requirements,4 = Tensile strength, 140 MPa, min,2 = Tensile modulus, 4500 MPa, min,2
35、= Charpy impact, 5.0 kJ/m2, min,7 = Deflection temperature at 1.8 MPa, 200C, min, and0 = Unspecified.If no properties are specified, the designation would be PA0110G30A00000.NOTE 8When a grade of polyamide is not fully identified by a standard callout, it is possible to specify all table properties
36、by the use of an additionof Classification D4000 suffixes. Suffix values will override the PA table values. An example of an unreinforced polyamide material is given as follows:PA0212KN023. This example is a general purpose, low viscosity PA6 material where K denotes tensile properties, N denotes te
37、nsile modulus with ISO527 as the test method, and 023 denotes a value of 2300 MPa.This value for tensile modulus overrides the normal table value.This example can be appliedto replace all table values, that is, tensile stress, notched Charpy impact, and heat deflection temperature.4.3 To facilitate
38、the specification of special materials where the basic property table does not reflect the properties required,Table B has been incorporated into this classification system. This table will be used in a manner similar to Table A.NOTE 9Pigmented or colored polyamides can differ significantly from the
39、 natural polymers in mechanical properties depending on the choice ofcolorants and concentrations. The main property affected is ductility, as illustrated by a reduction in Charpy impact and elongation values. In a typicalwhite pigmented polyamide, elongation losses of up to 50 % and Charpy impact l
40、osses of up to 30 % are common. To specify property requirements ofpigmented materials, use Table B.NOTE 10An example of a special material using this classification system is as follows: The designation PA0220B54220 would indicate the followingmaterial requirements from Table B:PA0220 = Polyamide 6
41、, heat stabilized, from Table PA,B = Table B property requirements,5 = Tensile strength, 70 MPa, min,4 = Tensile modulus, 2400 MPa, min,2 = Charpy impact, 4.0 kJ/m2, min,2 = Deflection temperature at 1.8 MPa, 55C, min, and0 = unspecified.TABLE PA Requirements for Polyamides Dry-as-MoldedA,BGroup Des
42、cription Class Description Grade DescriptionCViscosityNumber,ISO 307,min, mL/gDensity,DISO 1183g/cm3TensileStrength,ISO 527-1andISO 527-2,MPa, minTensileModulus,EISO 527-1andISO 527-2,MPa, minCharpyImpactResistance,ISO 179/1eA, kJ/m2,minDeflectionTemperature,FISO 75-1andISO 75-2,at 1.8 MPa,C, min01
43、PA66 1 General-purpose1 135 1.13 to 1.15 70 2300 3.3 602 165 1.13 to 1.15 70 2300 3.3 603 210 1.13 to 1.15 70 2300 3.3 604 270 1.13 to 1.15 70 2300 3.3 605 recycled 115 1.13 to 1.15 70 2300 3.3 606 recycled 135 1.13 to 1.15 70 2300 3.3 607 115 1.13 to 1.15 70 2300 3.3 60G15 15 % glass . . . 1.20 to
44、1.26 100 4000 3.0 215G20 20 % glass . . . 1.25 to 1.33 115 5000 4.0 220G25 25 % glass . . . 1.29 to 1.37 140 6000 5.0 225G35 35 % glass . . . 1.35 to 1.45 170 8000 7.0 235G40 40 % glass . . . 1.42 to 1.52 175 9000 8.0 235G45 45 % glass . . . 1.45 to 1.55 180 10 000 9.0 240G50 50 % glass . . . 1.51 t
45、o 1.61 190 11 000 10.0 245M40 40 % mineral . . . 1.45 to 1.55 80 5000 2.0 100D6779 173TABLE PA Requirements for Polyamides Dry-as-MoldedA,BGroup Description Class Description Grade DescriptionCViscosityNumber,ISO 307,min, mL/gDensity,DISO 1183g/cm3TensileStrength,ISO 527-1andISO 527-2,MPa, minTensil
46、eModulus,EISO 527-1andISO 527-2,MPa, minCharpyImpactResistance,ISO 179/1eA, kJ/m2,minDeflectionTemperature,FISO 75-1andISO 75-2,at 1.8 MPa,C, min0 other2 Heat-stabilized1 135 1.13 to 1.15 70 2300 3.0 602 165 1.13 to 1.15 70 2300 3.0 603 210 1.13 to 1.15 70 2300 3.0 604 270 1.13 to 1.15 70 2300 3.0 6
47、05 recycled 115 1.13 to 1.15 70 2300 3.0 606 recycled 135 1.13 to 1.15 70 2300 3.0 60G15 15 % glass . . . 1.20 to 1.26 100 4000 3.0 220G25 25 % glass . . . 1.29 to 1.37 140 6000 5.0 225G30 30 % glass . . . 1.32 to 1.42 160 7000 6.0 230G35 35 % glass . . . 1.35 to 1.45 170 8000 7.0 235G40 40 % glass
48、. . . 1.43 to 1.53 175 9000 8.0 235G45 45 % glass . . . 1.45 to 1.55 180 10 000 9.0 240G50 50 % glass . . . 1.51 to 1.61 190 11 000 10.0 245M40 40 % mineral . . . 1.45 to 1.55 80 5000 2.0 100R20 20 % filler . . . 1.23 to 1.31 70 3200 1.5 . . .R40 40 % filler . . . 1.43 to 1.53 100 5500 2.5 2000 othe
49、r3 Nucleated 1 135 1.13 to 1.15 80 2500 2.8 602 165 1.13 to 1.15 80 2500 2.8 603 210 1.13 to 1.15 80 2500 2.8 604 270 1.13 to 1.15 80 2500 2.8 605 recycled 115 1.13 to 1.15 80 2500 2.8 606 recycled 135 1.13 to 1.15 80 2500 2.8 600 other4 Nucleated,heat-stabilized1 Requirements the same as corresponding grades under Group 01, Class 323450 other5 Impact-modified1 . . . 1.06 to 1.12 52 1700 9.0 502 recycled . . . 1.06 to 1.12 50 1600 8.0 50G15 15 % glass . . . 1.15 to 1.23 85 3000 6.0 210G35 35 % glass . . . 1.31 to 1.41 110 5500 6.0 22
