1、WORLDWIDEENGINEERINGSTANDARDSMaterial Specification GMW16864Polyamide High Heat Resistant - Glass Fiber Reinforced, HeatStabilized, Flame Retardant Copyright 2012 General Motors Company All Rights ReservedNovember 2012 Originating Department: North American Engineering Standards Page 1 of 31 Scope1.
2、1 Material Description. This standard coversthe properties of a glass fiber reinforced, heatstabilized, flame retardant, high temperaturecapable polyamide, which is used in injected formfor molded components.1.2 Symbols. The material abbreviationsaccording to ISO 11469 are shown in Table 1.1.3 Typic
3、al Applications. Typical applicationsinclude the following: Engine Covers.1.4 Remarks. The classification into groups isaccording to the different ranges of glass fibercontent. Additional glass ranges will be added asthey become necessary.2 ReferencesNote: Only the latest approved standards areappli
4、cable unless otherwise specified.2.1 External Standards/Specifications.ASTM D3801 ISO 527-1/2ASTM D6869 ISO 1183ISO 75 ISO 1874-2ISO 179/1eA ISO 3451ISO 188 ISO 11469ISO 294 ISO 15512ISO 527 UL 942.2 GM Standards/Specifications.GMW3013 GMW3221GMW3059 GMW143352.3 Additional References.TMC003 Material
5、 Safety Data Sheet guidancedocuments (available at ).3 Requirements3.1 Requirements on Test Specimens.Reference GMW3221.3.2 Requirements on Delivery. Importantphysical, mechanical and thermal properties thatcharacterize the material are summarized incharts. The color shall be specified on drawings,
6、inmaterial specifications and otherwise.Unless otherwise specified, injection molding oftest specimens shall be accomplished per ISO 294with the conditions for injection molding fromISO 1874-2.All values indicated herein are based on materialconsidered to be in the dry-as-molded state withmoisture c
7、ontent of 0.2% maximum (ASTM D6869,ISO 15512, Method A or B, or GMW14335).Immediately after molding, specimens shall besealed in moisture-proof containers and stored at22 C 3 C for at least 24 h prior to test asspecified in ISO 1874-2. All tests shall beperformed on unannealed specimens immediatelya
8、fter their removal from the containers in acontrolled atmosphere per GMW3221, Code A,unless otherwise specified. In addition, testsspecified at temperatures below or above22 C 3 C shall be conducted at the specifiedtemperature using specimens conditioned at thespecified temperature for 4 h minimum.T
9、he minimum values specified in the propertytables must be met by test specimens in natural,black, or in a standard sampled color if natural orblack are not available.3.2.1 Compound Properties (Natural, Black andIntegrally Colored). See Tables 1. The followingare also required for full standard appro
10、val. Theminimum number of lots per test required is one innatural: Poissons Ratio, Coefficient of LinearThermal Expansion (CLTE), Mold Shrinkage,Stress Strain Curve at multiple temperatures (forexample -30 C, 23 C, 85 C), Shear ModulusCurve. See GMW3013 for the test procedures.3.3 Performance Requir
11、ements. Performancerequirements shall be specified on part drawings orin component specifications.Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STAN
12、DARDS GMW16864 Copyright 2012 General Motors Company All Rights ReservedNovember 2012 Page 2 of 3Table 1: Compound Properties (Natural and Black)Glass Fiber ReinforcementPercentage15%Property Standard Units ValueISO Symbol ISO 11469 PA-(GF15+Mxx)Ash Note 1 ISO 3451 % 13 to 35Density Note 2 ISO 1183
13、g/cm3 Target Range1.40 to 1.60Moisture Content ISO 15512 Method A orB or GMW14335 % 0.2Tensile Modulus ISO 527-1/2 MPa 5000 to 8500Tensile Stress at Break ISO 527-1/2 MPa 90Tensile Stress at Breakafter Heat Aging Note 3ISO 188ISO 527 % Retention 65Tensile Strain at Break ISO 527-1/2 % 2.0Notched Cha
14、rpy ImpactStrengthAt +23 CAt -30 CISO 179/1eA kJ/m2 3.03.0Notched Charpy Impactafter Heat Aging Note 4ISO 188ISO 179/1eA % Retention 65Heat DeflectionTemperature under Load1.8 MPaISO 75 C 170Flammability Rating(0.8mm)UL 94ASTM D3801 Rating V0Flammability Rating after(0.8mm)Heat Aging A Note 5Heat Ag
15、ing B Note 5UL 94ASTM D3801 Rating V0V0Note 1: Wide ash content range due to differences in flame retardant additives. Material is to be 15% glass fiber with the remainder of ashbeing flame retardant additive remnants.Note 2: Wide density range due to differences in flame retardant additives.Note 3:
16、 Specimens tested for Tensile Stress at Break to ISO 527 after heat aging 1000 h 5 h at +170 C 5 C according to ISO 188,Method A (air oven method) shall have a minimum of 65% retention relative to unaged specimens tested concurrently.Note 4: Specimens tested for Notched Charpy Impact per ISO 179/1eA
17、 after heat aging 1000 h 5 h at +170 C 5 C according toISO 188, Method A (air oven method) shall have a minimum of 65% retention relative to unaged specimens tested concurrently. Charpyimpact specimens shall be notched prior to aging.Note 5: Specimens tested for flammability to UL 94 after heat agin
18、g (A -1000 h 5 h at +170 C 5 C, B 3000 h 5 h at+170 C 5 C) according to ISO 188, Method A shall have a V0 rating.4 Manufacturing ProcessNot applicable.5 Rules and Regulations5.1 Legal Regulations. All materials must satisfyapplicable laws, rules, regulations andrecommendations valid in the country o
19、f usage.Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16864 Copyright 2012 General Motors Company All Rights ReservedNovember 2012 Page
20、 3 of 35.2 Language. In the event of conflict between theEnglish and domestic language, the Englishlanguage shall take precedence.5.3 Inspection and Rejection. Samples ofcomponents or materials released to a GMmaterial specification shall be tested for conformitywith the requirements of this materia
21、l specificationand approved by the responsible Engineeringdepartment prior to commencement of delivery ofbulk supplies.A new approval must be received for any changes,e.g., properties, manufacturing process, location ofmanufacture, etc. If not otherwise agreed, alltesting and documentation normally
22、required forinitial release must be completed.It is the responsibility of the supplier to inform thecustomer in a timely manner, without solicitation,and to include documentation of all modifications ofmaterials and/or processes and to apply for a newrelease.If not otherwise agreed, all release test
23、s shall berepeated and documented by the supplier prior tocommencement of delivery of non-conforming bulksupplies. In individual cases, a shorter test can beagreed to between the responsible Engineeringdepartment and the supplier.5.4 Material Safety Data Sheets/Safety DataSheets (MSDS/SDS). For new
24、productsubmissions, or when a change in chemicalcomposition of an existing product has occurred, acomplete copy of the Material Safety DataSheet/Safety Data Sheet must be submitted incompliance with the Globally Harmonized Systemof Classification and Labeling of Chemicals (GHS)requirements or other
25、country-specific MSDS/SDSrequirements. In addition, product MSDS/SDSsubmissions must be in compliance with specificcountry General Motors TMC003 Material SafetyData Sheet/Safety Data Sheet guidancedocuments where available.5.5 All materials supplied to this standard mustcomply with the requirements
26、of GMW3059,Restricted and Reportable Substances forParts.6 Approved SourcesMaterials supplied to this specification must beapproved by General Motors.A list of approved materials can be found inMATSPC. This GM Material File is provided to thirdparties to reduce redundant testing of materials. Ifappr
27、oved material already listed is used, the partsupplier can use GM Material File reference forProduction Part Approval Process (PPAP) materialapproval. If the decision is made to use a not yetapproved material, contact the Plastics GlobalSubsystem Leadership Team (GSSLT) for detailon the approval pro
28、cess. The material approvalprocess must be completed prior to PPAP startdate of the part supplied to General Motors.7 Notes7.1 Glossary.MATSPC: Global repository of GM approvedmaterials for corresponding GM EngineeringStandards.7.2 Acronyms, Abbreviations, and Symbols.ASTM ASTM InternationalCLTE Coe
29、fficient of Linear ThermalExpansionGHS Globally Harmonized System ofClassification and Labeling ofChemicalsGSSLT Global Subsystem Leadership TeamMSDS Material Safety Data SheetPPAP Production Part Approval ProcessSDS Safety Data SheetUL Underwriters Laboratories8 Coding SystemThis standard shall be
30、referenced in otherdocuments, drawings, etc., as follows:Material per GMW16864P-PA-GF15Where:GMW = General Motors Worldwide16864 = Sequential NumberP = PlasticPA = Polymer typeGF = Reinforcement typeYY = Percentage of glass fiberreinforcement by mass9 Release and RevisionsThis standard was originate
31、d in September 2012. Itwas first approved by the Plastics GlobalSubsystem Leadership Team in October 2012. Itwas first published in November 2012.Issue PublicationDate Description(Organization)1 NOV 2012 Initial publication.Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
