1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW14896 Elastomer for Filler Strips Copyright 2012 General Motors Company All Rights Reserved September 2012 Originating Department: North American Engineering Standards Page 1 of 4 1 Scope This specification covers the materials and performan
2、ce of elastomeric materials used for filler strip applications. 1.1 Material Description. Materials covered by this specification are divided into two types. 1.1.1 Type A. Ethylene Propylene Diene Terpolymer (EPDM). 1.1.2 Type B. Drawing defined (e.g., using SAE J200 or ASTM D2000 line callout). 1.2
3、 Symbols. Not applicable. 1.3 Typical Applications. Not applicable. 1.4 Remarks. Not applicable. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D2000 ISO 188 ISO 1431-1 ISO 7619-1 ISO 37 ISO 815 ISO 3865 SA
4、E J200 2.2 GM Standards/Specifications. GMW3059 GMW14162 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents (available at ). 3 Requirements 3.1 Resources. 3.1.1 Test Samples. Unless otherwise specified, the shape, size and number of test pieces shall be in accordance wit
5、h the relevant test method. Unless otherwise specified, samples are finished parts or to be taken from finished parts. If not otherwise stated, mechanical properties in delivery state and after heat or fluid immersion are to be tested at +23 C and with the same test method. 3.1.2 Conditioning. Condi
6、tioning shall be as specified in the relevant test method. 3.1.3 Equipment. Conforming to the relevant test method. 3.1.4 Calibration. The test facilities and equipment shall be in good working order and shall have a valid calibration label. 3.1.5 Alternatives. Alternative test facilities and equipm
7、ent may also be used. However, all measuring variables as specified in this specification shall be determined correctly with respect to its physical definition. 3.1.6 Facilities. Conforming to the relevant test method. 3.1.7 Deviations. Deviations from the requirements of this standard shall have be
8、en agreed upon. Such deviations shall be specified on component drawings, test certificates, reports, etc. 3.2 Material and Performance Requirements. Material and performance requirements are summarized in Table 1. Copyright General Motors Company Provided by IHS under license with General Motors Co
9、mpanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14896 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 2 of 4 Table 1: Material and Performance Properties Property Test Method Unit Value Hardne
10、ss Type A ISO 7619-1 Shore A 55 5 Type B As specified on drawing/math data file Shore A As specified on drawing Tensile Modulus at 100% Elongation Type A ISO 37, Type 2 or 4 dumbbell, 200 mm/minute 20 mm/minute MPa 1.3 to 2.3 Type B As specified on drawing/math data file MPa As specified on drawing
11、Elongation at Break Type A ISO 37, Type 2 or 4 dumbbell, 200 mm/minute 20 mm/minute % 250 minimum Type B As specified on drawing/math data file % As specified on drawing Age Resistance (Heat Aging) Type A ISO 188 Method B,168 h -2 h at 70 C 3 C Change in Hardness Shore A 10 maximum Type B As specifi
12、ed on drawing/math data file As specified on drawing Compression Set Type A ISO 815, +70 C 3 C, 24 h -2 h, 25% compressed % 25 maximum Type B As specified on drawing/math data file % As specified on drawing Ozone Resistance Type A ISO 1431-1, 50 pphm, 40 C 2 C, 20% strain, visual examination No crac
13、ks permissible Type B As specified on drawing/math data file As specified on drawing Paint Staining Only if required on drawing Type A ISO 3865, Method A, 24 h + 0 h,-2 h at 80 C 3 C, using production representative painted panels. Basecoat shall be white. To develop latent stain, the panels shall b
14、e exposed to UV following the heat exposure. UV-Exposure to GMW14162/B/2 MJ/m minimum. No staining permissible Type B As specified on drawing/math data file As specified on drawing 4 Manufacturing Process Not Applicable Copyright General Motors Company Provided by IHS under license with General Moto
15、rs CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14896 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 3 of 4 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy appl
16、icable laws, rules, regulations and recommendations valid in the country of usage. 5.2 Language. In the event of conflict 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
17、specification shall be tested for conformity with the requirements of this material specification and approved by the responsible Engineering department prior to commencement of delivery of bulk supplies. A new approval must be received for any changes, e.g., properties, manufacturing process, locat
18、ion of manufacture, etc. If not otherwise agreed, all testing and documentation normally required for initial release must 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 mate
19、rials and/or processes and to apply for a new release. If not otherwise agreed, all release tests shall be repeated and 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 Engineeri
20、ng department and the supplier. 5.4 Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS). For new product submissions, 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 complianc
21、e with the Globally Harmonized System of Classification and Labeling of Chemicals (GHS) requirements or other country-specific 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 She
22、et guidance documents where available. 5.5 All materials supplied to this standard must comply with the requirements of 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 material
23、s can be found in MATSPC. This GM Material File is provided to third parties to reduce redundant testing of materials. 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 m
24、ade to use a not yet approved material, contact the Elastomers Global Subsystem Leadership Team for details on the approval 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
25、Approved Materials for corresponding GM Engineering Standards. 7.2 Acronyms, Abbreviations, and Symbols. ASTM ASTM International EPDM Ethylene Propylene Diene Terpolymer GHS Globally Harmonized System of Classification and Labeling of Chemicals Mpa Megapascal MSDS Material Safety Data Sheet PPAP Pro
26、duction Part Approval Process pphm Parts per Hundred Million SAE SAE International SDS Safety Data Sheet UV Ultraviolet Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORL
27、DWIDE ENGINEERING STANDARDS GMW14896 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 4 of 4 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW14896, Type “X“, where X = material type as defined in Section 1
28、.1. 9 Release and Revisions This standard was originated in December 2005. It was first approved by the Global Elastomers Team in May 2006. It was first published in February 2007. Issue Publication Date Description (Organization) 1 FEB 2007 Initial publication. 2 SEP 2012 2012 Revision. (Elastomers Global Subsystem Leadership Team) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
