1、WORLDWIDEENGINEERINGSTANDARDSMaterial Specification GMW16733Polybutylene Terephthalate - Glass Fiber Reinforced, Heat Stabilized Copyright 2012 General Motors Company All Rights ReservedOctober 2012 Originating Department: North American Engineering Standards Page 1 of 41 ScopeNote: Nothing in this
2、standard supercedesapplicable laws and regulations.Note: In the event of conflict between the Englishand domestic language, the English language shalltake precedence.This specification covers the properties of injection-moldable, glass-reinforced, heat-stabilized,polybutylene terephthalate (PBT).1.1
3、 Material Description. Not applicable.1.2 Symbols. The material abbreviationsaccording to ISO 11469 are shown in Table 1.1.3 Typical Applications. Typical applicationsinclude electrical connectors and module housings.1.4 Remarks. Not applicable.2 ReferencesNote: Only the latest approved standards ar
4、eapplicable unless otherwise specified.2.1 External Standards/Specifications.ASTM D6869 ISO 1874-2ASTM E831 ISO 3146ISO 75 ISO 3451ISO 179/1eA ISO 7792-2ISO 179/1eU ISO 11357-3ISO 294-1 ISO 11359-2ISO 294-3/4 ISO 11469ISO 527-1 ISO 15512ISO 527-2 UL 94ISO 11832.2 GM Standards/Specifications.GMW3013
5、GMW3221GMW3059 GMW143352.3 Additional References.TMC003 Material Safety Data Sheet guidancedocuments (available at ).3 Requirements3.1 Requirements on Test Specimens.Reference GMW3221.Materials approved to this specification shall meetthe requirements of GMW3013.Unless otherwise specified, injection
6、 molding oftest specimens shall be accomplished perISO 294-1, with the conditions for injection moldingfrom ISO 7792-2.All values indicated herein are based on materialconsidered to be in the dry-as-molded state, withmoisture content of 0.02% maximum(ASTM D6869; ISO 15512, Method A or B, orGMW14335)
7、. Immediately after molding,specimens shall be sealed in moisture-proofcontainers and stored at (23 2) C for at least24 h prior to test as specified in ISO 1874-2. Alltests shall be performed on unannealed specimensimmediately after their removal from the containersin a controlled atmosphere per GMW
8、3221,Code A, unless otherwise specified. In addition,tests specified at temperatures below or above(23 2) C shall be conducted at the specifiedtemperature using specimens conditioned at thespecified temperature for 4 h minimum.The minimum values specified in the propertytables must be met by test sp
9、ecimens in natural,black, or in a standard sampled color if natural orblack are not available.3.2 Requirements on Delivery. Importantphysical, mechanical and thermal properties thatcharacterize the material are summarized inTable 1. The color shall be specified on drawings,in material specifications
10、 and otherwise.3.3 Compound Properties (Natural and Black).See Table 1. The following are also required for fullstandard approval. The minimum number of lotsper test required is one in natural: Poissons Ratio,Coefficient of Linear Thermal Expansion (CLTE),mold shrinkage, stress strain curve at multi
11、pletemperatures (-30 C, +23 C, +85 C). SeeGMW3013 for the test procedures.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 GMW16733 Copyright
12、 2012 General Motors Company All Rights ReservedOctober 2012 Page 2 of 4Table 1: Compound Properties (Natural and Black)Nominal Glass Fiber ReinforcementProperty Standard Units 10% 15% 20% 30%ISO Symbol ISO 11469 Not applicable PBT-GF10PBT-GF15PBT-GF20PBT-GF30Ash ISO 3451 % by Mass 8 to 12 12 to 18
13、17 to 23 28 to 32Density ISO 1183 g/cm3 Target Range:1.37 0.03 Target Range:1.41 0.03 Target Range:1.45 0.03 Target Range:1.53 0.03Tensile Modulus ISO 527-1/2 MPa 4300 4600 6000 8300Stress at Break ISO 527-1/2 MPa 85 89 100 120Notched Charpy ImpactStrengthAt +23 CAt -30 CISO 179/1eU kJ/m2 3 2 4 3 5
14、4 5 4Tensile Strength atBreak After 1000 h at140 qCISO 527-1/2 % Retention 75Notched Charpy ImpactStrength After 1000 h at140 qCISO 179/1eA1000 h at 140 C % Retention 75Melting Temperature ISO 3146 orISO 11357-3 C 215 215 215 215Heat DeflectionTemperature UnderLoad: 1.8 MPaISO 75 C 170 170 180 185Co
15、efficient of LinearThermal Expansion (forreference only)Parallel to FlowPerpendicular to FlowASTM E831 orISO 11359-2, TMA,Mean Secant ValueOver the TemperatureRange-30 C to +160 C10-6mm/mm/C Report Report Report ReportMold Shrinkage (forinformation only)after 48 h at 23 qCParallel to FlowPerpendicul
16、ar to FlowISO 294-3/4 %0.6 to 0.81.2 to 1.40.60 to 0.701.0 to 1.20.5 to 0.70.6 to 0.90.3 to 0.50.7 to 0.9Flammability UL 94(Flame ResistantGrades Only)UL 94 Specimen125 x 13 x 1.6 mmClassification Not applicable Not applicable Not applicable V0Copyright General Motors Company Provided by IHS under l
17、icense with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16733 Copyright 2012 General Motors Company All Rights ReservedOctober 2012 Page 3 of 43.4 Chemical Requirements. All partsmanufactured from mold
18、ing compounds shall beresistant to the media they contact at their place ofuse.4 Manufacturing ProcessNot applicable.5 Rules and Regulations5.1 Legal Regulations. All materials must satisfyapplicable laws, rules, regulations andrecommendations valid in the country of usage.5.2 Language. In the event
19、 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 material specificationand approved by th
20、e 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 required forinitial release must
21、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 tests shall berepeated and documented
22、 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 productsubmissions, or when a cha
23、nge 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 country-specific MSDS/SDSrequirem
24、ents. 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 of GMW3059,Restricted and Reporta
25、ble 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. Ifapproved material already listed is u
26、sed, 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 GM MaterialsEngineering for detail on the approval process. Thematerial approval process must be completed priorto
27、PPAP start date of the part supplied to GeneralMotors.7 Notes7.1 Glossary.MATSPC: Global repository of GM approvedmaterials for corresponding GM EngineeringStandards.7.2 Acronyms, Abbreviations, and Symbols.CLTE Coefficient of Linear ThermalExpansionGHS Globally Harmonized System ofClassification an
28、d Labeling ofChemicalsGSSLT Global Subsystem Leadership TeamMSDS Material Safety Data SheetPBT Polybutylene TerephthalateSDS Safety Data SheetTMA Thermomechanical Analysis8 Coding SystemThis standard shall be referenced in otherdocuments, drawings, etc., as follows:Glass Filled Hydrolysis Resistant
29、PolybutyleneTerephthalate per GMW16733 P-PBT-GFYYZWhere:YY = Percentage of glass fillerZ = Additional codes from GMW3013For example: GMW16733 P-PBT-GF30F is apolybutylene terephthalate with 30% glass fiberreinforcement and UL 94 V0 flammability rating.Copyright General Motors Company Provided by IHS
30、 under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16733 Copyright 2012 General Motors Company All Rights ReservedOctober 2012 Page 4 of 49 Release and RevisionsThis standard was originate
31、d in November 2011. Itwas first approved by the Plastics GlobalSubsystem Leadership Team (GSSLT) in March2012. It was first published in March 2012.Issue PublicationDate Description(Organization)1 MAR 2012 Initial publication.2 OCT 2012 Updated heat agetemperatures in Table 1.(Plastics GSSLT)Cross-R
32、eference of Replaced Material CodingGMW16733Material Codes Formerly Identified AsGMW16733P-PBT-GF10 QK 006611 (GME)GMW16733P-PBT-GF15 GMP.PBT.006(GMNA)QK 006612 (GME)GMW16733P-PBT-GF20 GMP.PBT.024(GMNA)QK 006613 (GME)GMW16733P-PBT-GF30 GMP.PBT.010(GMNA)QK 006615 (GME)GMW16733P-PBT-GF30FGMP.PBT.029(GMNA)Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
