1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16841 Polyether Ether Ketone (PEEK) - Carbon Fiber Reinforced, Polytetrafluoroethylene (PTFE) Lubricated Copyright 2012 General Motors Company All Rights Reserved September 2012 Originating Department: North American Engineering Standards Pa
2、ge 1 of 5 1 Scope 1.1 Material Description. This standard covers the properties of a 15% carbon fiber reinforced, 15% polytetrafluoroethylene (PTFE) lubricated polyether ether ketone (PEEK) material. The repeat unit of this aromatic, semi-crystalline PEEK polymer comprises oxy-1.4-phenylene-oxy-1,4-
3、phenylene-carbonyl-1,4-phenylene as shown in Figure 1. This compound can be injection molded to various components. Figure 1: Chemical Structure of Polytetrafluoroethylene 1.2 Symbols. The material abbreviations according to ISO 11469 are shown in Table 1. 1.3 Typical Applications. This material can
4、 be used for transmission seal and thrust washer applications on steel mating surfaces with a minimum of Rockwell C 28. Materials with high strength, high temperature resistance, good transmission fluid resistance and good wear resistance are expected. It is users responsibility to validate its feas
5、ibility of running against soft mating surfaces, such as aluminum. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D4065 ISO 179/1eA ISO 527-1/2 ISO 11357 ASTM E831 ISO 179/1eU ISO 1183 ISO 11357-2 ASTM E135
6、6 ISO 180/1A ISO 3146 ISO 11359-2 ISO 178 ISO 188 ISO 3167 ISO 11469 2.2 GM Standards/Specifications. 9986153 GMW3059 GMW15468 GMW16771 GMW3013 GMW3221 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents (available at ). 3 Requirements 3.1 Requirements on Test Specimens.
7、Reference GMW3221. 3.2 Initial Approval. The material shall fulfill the requirements defined per GMW3013, General Requirement for Handling of Technical Terms of Delivery for Plastics for formal approval under this specification. Data from defined number of lots for each property shall be submitted a
8、nd meet the control limits defined in Table 1, Table 2, and Table 3. 3.3 Material Properties. Material properties defined in 3.3.1 are required for lot releasing. Material properties defined in 3.3.2 thru 3.3.6 are required once for initial approval, or when there are any changes to ingredients, sou
9、rce of ingredients and/or manufacturing process. 3.3.1 Requirements on Material Delivery. Each lot of material to be used for GM applications must be certified and show the compliance to the requirements specified in Table 1 when shipped to part fabricators. Copyright General Motors Company Provided
10、 by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16841 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 2 of 5 3.3.2 Heat Resistance and Fluid Resista
11、nce. Requirements under this section are defined in Table 2. 3.3.3 Other Material Properties. Requirements under this section are defined in Table 3. 3.3.4 Wear Resistance. Perform material wear test per GMW16771, Wear Testing Procedure for Plastic Materials against Metal Mating Surfaces under Dry C
12、ondition. Sequence A is required for thrust washer applications. Material must not fail at PV lower than 10.51 MPa-meter/second (300,000 psi-foot/minute). Sequence B is for sealing applications. Material must not fail at PV lower than 8.76 MPa-meter/second (250 000 psi-foot/minute). 3.3.5 Stress Str
13、ain Curve. Tensile stress-strain curves and shear stress-strain curves at multiple temperatures (e.g., -40 C, 22 C, 150 C) shall be provided by material manufacturers. See GMW3013 for the test procedures. 3.3.6 DMA Curve. Provide Dynamic Mechanical Analysis (DMA) curve conducted from room temperatur
14、e to 250 C at 1 Hz frequency 5 C/minute in air per ASTM D4065. Strain level should be in the linear response range. Report storage modulus, loss modulus, and loss tangent as a function of temperature. 3.4 Performance Requirements. Performance requirements shall be specified on part drawings and the
15、Statement of Requirements (SOR) of parts or components. 4 Manufacturing Process This material is injection moldable. Molders should ensure a PEEK-CF15-PTFE15 Density ISO 1183 g/cm3 1.39 to 1.45 Flexural Strength ISO 178 MPa 230 Flexural Modulus ISO 178 MPa 11 500 Tensile Stress at Break ISO 527-1/2
16、MPa 160 Tensile Strain at Break ISO 527-1/2 % 1.3 Tensile Modulus ISO 527-1/2 MPa 11 500 Notched Izod Impact Strength ISO 180/1A kJ/m2 3.4 Notched Charpy Impact Strength (Optional to Izod) ISO 179/1eA kJ/m2 3.4 Copyright General Motors Company Provided by IHS under license with General Motors Compan
17、yNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16841 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 3 of 5 Table 2: Heat Resistance and Automatic Transmission Fluid (ATF) Resistance Property Sta
18、ndard Units Value Heat aging at 150 C for 1000 h per ISO 188 Tensile Strength after Heat Aging ISO 527-1/2 MPa 150 Notched Izod (or Charpy) Impact Strength after Heat ISO 179/1eU (or ISO 180/1A) kJ/m2 3.2 Automatic Transmission Fluid (ATF) aging per GMW15468 at 150 C for 504 h using Dexron VI ATF pe
19、r 9986153 unless otherwise specified Tensile Strength after ATF Aging ISO 527-1/2 MPa 150 Tensile Strain after ATF Aging ISO 527-1/2 MPa 1.2 Notched Izod (or Charpy) Impact Strength after ATF Aging ISO 179/1eA (or ISO 180/1A) kJ/m2 3.2 Automatic Transmission Fluid (ATF) aging per GMW15468 at 150 C f
20、or 1008 h using Dexron VI ATF per 9986153 unless otherwise specified Tensile Strength after ATF Aging ISO 527-1/2 MPa 150 Tensile Strain after ATF Aging ISO 527-1/2 MPa 1.2 Notched Izod (or Charpy) Impact Strength after ATF Aging ISO 179/1eA (or ISO 180/1A) kJ/m2 3.0 Table 3: Other Material Properti
21、es Requirements Property Standard Units Value Melting Temperature ISO 3146 or ISO 11357 C 330 Glass Transition Temperature ISO 113572 or ASTM E1356 C 140 Poissons Ratio Note 1 ISO 527-1/2 Specimen ISO 3167 at room temperature No unit 0.42 to 0.45 Coefficient of Linear Thermal Expansion (CLTE) - Para
22、llel (Flow) ASTM E831 or ISO 11359-2 (TMA), Room temperature to 140 C 10-6 mm/mm/C 20 Coefficient of Linear Thermal Expansion (CLTE) - Normal (Cross Flow) ASTM E831 or ISO 11359-2 (TMA), Room temperature to 140 C 10-6 mm/mm/C 65 Note 1: Poissons Ratio is listed for reference only. The measured value
23、 for the specific approved compound should be used for any design related calculation or simulation. 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 S
24、TANDARDS GMW16841 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 4 of 5 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, rules, regulations and recommendations valid in the country of usage. 5.2 Language. In the event of confli
25、ct between the English and domestic language, the English language shall take precedence. 5.3 Inspection and Rejection. Samples of components or materials released to a GM material specification shall be tested for conformity with the requirements of this material specification and approved by the r
26、esponsible Engineering department prior to commencement of delivery of bulk supplies. A new approval must be received for any changes, e.g., properties, manufacturing process, location of manufacture, etc. If not otherwise agreed, all testing and documentation normally required for initial release m
27、ust be completed. It is the responsibility of the supplier to inform the customer in a timely manner, without solicitation, and to include documentation of all modifications of materials and/or processes and to apply for a new release. If not otherwise agreed, all release tests shall be repeated and
28、 documented by the supplier prior to commencement of delivery of non-conforming bulk supplies. In individual cases, a shorter test can be agreed to between the responsible Engineering department and the supplier. 5.4 Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS). For new product submissi
29、ons, or when a change in chemical composition of an existing product has occurred, a complete copy of the Material Safety Data Sheet/Safety Data Sheet must be submitted in compliance with the Globally Harmonized System of Classification and Labeling of Chemicals (GHS) requirements or other country-s
30、pecific MSDS/SDS requirements. In addition, product MSDS/SDS submissions must be in compliance with specific country General Motors TMC003 Material Safety Data Sheet/Safety Data Sheet guidance documents where available. 5.5 All materials supplied to this standard must comply with the requirements of
31、 GMW3059, Restricted and Reportable Substances for Parts. 6 Approved Sources Materials supplied to this specification must be approved by General Motors. A list of approved materials can be found in MATSPC. This GM Material File is provided to third parties to reduce redundant testing of materials.
32、If approved material already listed is used, the part supplier can use GM Material File reference for Production Part Approval Process (PPAP) material approval. If the decision is made to use a not yet approved material, contact the Plastics Global Subsystem Leadership Team for detail on the approva
33、l process. The material approval process must be completed prior to PPAP start date of the part supplied to General Motors. 7 Notes 7.1 Glossary. MATSPC: Global repository of GM approved materials for corresponding GM Engineering Standards. 7.2 Acronyms, Abbreviations, and Symbols. ATF Automatic Tra
34、nsmission Fluid CLTE Coefficient of Linear Thermal Expansion DMA Dynamic Mechanical Analysis GHS Globally Harmonized System of Classification and Labeling of Chemicals MSDS Material Safety Data Sheet PEEK Polyether Ether Ketone PPAP Production Part Approval Process PTFE Polytetrafluoroethylene SDS S
35、afety Data Sheet SOR Statement of Requirements 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 GMW16841 Copyright 2012 General Motors Compan
36、y All Rights Reserved September 2012 Page 5 of 5 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: For sealing applications, material per: GMW16841-PEEK-CF15-PTFE15-Sealing For thrust washer applications, material per: GMW16841-PEEK-CF15-PTFE15-Thrust
37、Washer Where: GMW = General Motors Worldwide 16841 = Sequential number PEEK = Polyether Ether Ketone CF15 = 15% Carbon Fiber PTFE15 = 15% PTFE For dynamic sealing applications, material must not fail at PV lower than 8.76 MPa-meter/second (250 000 psi-foot/minute) when tested in Sequence B per GMW16
38、771. For thrust washer applications, material must not fail at PV lower than 10.51 MPa-meter/second (300,000 psi-foot/minute) when tested in Sequence A per GMW16771. 9 Release and Revisions This standard was originated in July 2012. It was first approved by the Plastics Global Subsystem Leadership T
39、eam in September 2012. It was first published in September 2012. Issue Publication Date Description (Organization) 1 SEP 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-,-,-
