1、Designation:D520422Standard Classification System and Basis for Specification forPolyamide-Imide(PAI)Molding and Extrusion Materials1This standard is issued under the fixed designation D5204;the number immediately following the designation indicates the year oforiginal adoption or,in the case of rev
2、ision,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 This classification
3、 system covers polyamide-imide ma-terials suitable for injection molding and extrusion.1.2 The properties included in this classification system arethose required to identify the compositions covered.It ispossible that other requirements are necessary to identifyparticular characteristics important
4、to specialized applications.The use of suffixes as shown in Section 5 is one way ofspecifying these requirements.1.3 This standard allows for the use of recycled materialsprovided that specification requirements based upon this clas-sification system are met.1.4 This classification system and subseq
5、uent line call-out(specification)is intended to be a means of calling out plasticsmaterials used in the fabrication of end items or parts.It is notintended for the selection of materials.Material selection needsto be made by those having expertise in the plastics field aftercareful consideration of
6、the design and the performancerequired of the part,the environment to which it will beexposed,the fabrication process to be employed,the inherentproperties of the material other than those covered by thisclassification,and the economics.1.5 The values stated in SI units are to be regarded as thestan
7、dard.(Reporting in inch-pound units is acceptable.)1.6 The following precautionary caveat pertains only to thetest methods portion,Section 11,of this classification system:This standard does not purport to address all of the safetyconcerns,if any,associated with its use.It is the responsibilityof th
8、e user of this standard to establish appropriate safety,health,and environmental practices and determine the appli-cability of regulatory limitations prior to use.NOTE1There is no known ISO equivalent to this standard.1.7 This international standard was developed in accor-dance with internationally
9、recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D149 Test Method for
10、 Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD150 Test Methods for AC Loss Characteristics and Permit-tivity(Dielectric Constant)of Solid Electrical InsulationD256 Test Methods for Determining the Izod PendulumImpact Resi
11、stance of PlasticsD257 Test Methods for DC Resistance or Conductance ofInsulating MaterialsD618 Practice for Conditioning Plastics for TestingD790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating Materi-alsD792 Test Methods for Density and Specifi
12、c Gravity(Rela-tive Density)of Plastics by DisplacementD883 Terminology Relating to PlasticsD1525 Test Method for Vicat Softening Temperature ofPlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD1708 Test Method for Tensile Properties of Plastics by Useof Microtensile SpecimensD286
13、3 Test Method for Measuring the Minimum OxygenConcentration to Support Candle-Like Combustion ofPlastics(Oxygen Index)D3641 Practice for Injection Molding Test Specimens ofThermoplastic Molding and Extrusion MaterialsD3892 Practice for Packaging/Packing of PlasticsD4000 Classification System for Spe
14、cifying Plastic Materi-als1This classification system is under the jurisdiction ofASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials.Current edition approved Nov.1,2022.Published November 2022.Originallyapproved in 1991.Last previous editi
15、on approved in 2019 as D5204-19.DOI:10.1520/D5204-22.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of
16、 Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1E29 Practice for Using Si
