1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16647 Polypropylene - Glass Fiber Reinforced, Chemically Coupled, High Heat Resistant, Copper Deactivated, Injection Molding Homopolymer Copyright 2012 General Motors Company All Rights Reserved January 2012 Originating Department: North Ame
2、rican Engineering Standards Page 1 of 3 1 Scope 1.1 Material Description. This standard covers the properties of a glass filled, chemically coupled, high heat resistant, copper deactivated, injection molding grade polypropylene homopolymer. 1.2 Symbols. The material abbreviation according to ISO 114
3、69 is shown in Table 1. 1.3 Typical Applications. Typical applications include the following: Radiator Fan Blades and Shrouds. 1.4 Remarks. The classification into groups is according to the different ranges of glass fiber content. 2 References Note: Only the latest approved standards are applicable
4、 unless otherwise specified. 2.1 External Standards/Specifications. ISO 75 ISO 1183 ISO 179/1eA ISO 1873-2 ISO 188 ISO 3451-1 ISO 294 ISO 3167 ISO 527-1/2 ISO 11469 ISO 527-1 SAE J1686 ISO 527-2 2.2 GM Standards/Specifications. GMW3013 GMW3221 GMW3059 2.3 Additional References. TMC003 Material Safet
5、y Data Sheet guidance documents (available at ). 3 Requirements 3.1 Requirements on Test Specimens. Important physical, mechanical and thermal properties that characterize the material are summarized in charts. The color shall be specified on drawings, in material specifications and otherwise. Unles
6、s otherwise specified, injection molding of test specimens shall be accomplished per ISO 294 with the conditions for injection molding from ISO 1873-2. All test specimens shall be brought to equilibrium in standard conditions for temperature and moisture and tested in that state as defined in GMW322
7、1, Code A, unless the test method indicates that standard conditioning is not required. Condition specimens for a minimum of 24 h prior to testing or until moisture equilibrium is reached. If specimens are tested outside the conditioned environment, they shall be tested within 10 minutes of removal.
8、 The minimum values specified in the property tables must be met by test specimens in natural, black, or in a standard sampled color if natural or black are not available. For colored grades where other pigment and additive systems (e.g., stabilizer) are used, the impact values shall not decrease mo
9、re than 10% from the specified minimum value. 3.1.1 Compound Properties (Natural and Black). See Table 1. The following are also required for full standard approval. The minimum number of lots per test required is one in natural: Poissons Ratio, Coefficient 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 GMW16647 Copyright 2012 General Motors Company All Rights Reserved January 2012 Page 2 of 3 of Linear Thermal Expansion (CLTE), Mold S
11、hrinkage, Stress/Strain Curve at multiple temperatures (for example -30 C, 23 C, 85 C), Viscosity Number, Differential Scanning Calorimetry (DSC) Curve, and Infrared Spectroscopy Curve. See GMW3013 for the test procedures and parameters. Table 1: Compound Properties (Natural and Black) Nominal Glass
12、 Fiber Reinforcement Percentage 25% 30% Property Standard Unit Value Value ISO Symbol ISO 11469 - PP-GF25PP-GF30 Glass Filler ISO 3451-1, Method A % by mass 23 to 27 28 to 32 Density ISO 1183, Method A g/cm3 Target Range 1.08 to 1.10 Target Range 1.05 to 1.15 Tensile Strength at Break ISO 527-1, ISO
13、 527-2, specimen A, test speed 5 mm/minute MPa 75 to 85 70 to 90 Tensile Modulus ISO 527-1/2, ISO 3167, 4 mm thick Type A bar, 1 mm/minute MPa 5400 3900 Notched Charpy Impact at +23 C ISO 179/1eA, 80 x 10 x 4 mm kJ/m2 6.5 6.5 Deflection Temperature Under Load, 1820 kPa ISO 75 (reference SAE J1686),
14、flatwise C 140 128 Tensile Strength at Break After Heat Aging ISO 527-1/2, Test speed 5 mm/minute; Heat Age per ISO 188, 1500 h at 140 C % Retention 75 75 Tensile Strength at Break After Exposure to Copper Test per Paragraph 3.3, ISO 527-1/2, Test speed 5 mm/minute % Retention 75 75 3.2 Performance
15、Requirements. Performance requirements shall be specified on part drawings or in component specifications. 3.3 Tensile Strength After Copper Exposure. On five standard tensile bars, wrap neck portion with 40 mm x 25 mm x 0.127 mm 0.05 mm thick copper foil. Secure the copper foil using a binder clip.
16、 Suspend specimens on rack in oven using binder clips. Expose the bars for 1500 h at 140 C 2 C. Rotate the rack 180 degrees weekly to ensure uniform heat exposure. Remove tensile bars and copper foil and condition the samples for 40 h at 23 C 2 C and 50 2% relative humidity (RH). Test the tensile ba
17、rs per ISO 527-1 and report average tensile strength value. 4 Manufacturing Process Not applicable 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 conflict b
18、etween the English and domestic language, the English language shall take precedence. 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 GMW166
19、47 Copyright 2012 General Motors Company All Rights Reserved January 2012 Page 3 of 3 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 respo
20、nsible 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 must
21、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 doc
22、umented 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 Initial Source Approval. No shipments shall be made by any supplier until representativ
23、e initial production samples have been approved by the appropriate Materials Engineering department(s) as meeting the requirements of this specification. 5.5 Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS). For new product submissions, or when a change in chemical composition of an existin
24、g 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-specific MSDS/SDS requirements. In addition, product MSDS/SD
25、S submissions must be in compliance with specific country General Motors TMC003 Material Safety Data Sheet/Safety Data Sheet guidance documents where available. 5.6 All materials supplied to this standard must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 6
26、 Approved Sources Engineering qualifications of an approved source are required for this standard. Only sources listed in the GM Materials File (MATSPC) under this standard number have been qualified by Engineering as meeting the requirements of this standard. 7 Notes 7.1 Glossary. MATSPC: Global re
27、pository of GM approved materials for corresponding GM Engineering Standards. 7.2 Acronyms, Abbreviations, and Symbols. CLTE Coefficient of Linear Thermal Expansion DSC Differential Scanning Calorimetry GHS Globally Harmonized System MSDS Material Safety Data Sheet RH Relative Humidity SDS Safety Da
28、ta Sheet 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW16647P-PP-GFXX (XX = Glass reinforcing content as specified in Table 1). 9 Release and Revisions This standard was originated in July 2011. It was first approved by the Plastics
29、 Global Subsystem Leadership team in January 2012. It was first published in January 2012. Issue Publication Date Description (Organization) 1 JAN 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-,-,-
