GMNA-GMP.PE.011-2003.pdf

ENGINEERING STANDARDS Material Specification Plastics GMP.PE.011 Polyethylene High Density, Homopolymer © Copyright 2003 General Motors Corporation All Rights Reserved October 2003 Page 1 of 2 1 Scope This specification covers the properties of a high density polyethylene homopolymer. 1.1 Symbol. The material abbreviation accord- ing to ISO 11469 is PE-HD 1.2 Typical Applications. Typical applications include the following: Seat slides. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D638 ASTM D648 ASTM D790 ASTM D792 ASTM D1928 ASTM D3763 ISO 11469 2.2 GM Standards/Specifications. GM9036P GMW3001 GMW3059 GMW3221 3 Requirements 3.1 Requirements on Delivery. 3.1.1Requirements for Test Specimens. Tests shall be conducted using the latest issue of the test methods indicated. Suitable precautions should be taken to ensure that applicable safe limits are not exceeded when conducting test procedures, processes, and/or handling the materials required by this specification. Test specimens shall be compression molded according to ASTM D1928, Procedure C. Test specimens shall be 1.9 ± 0.2 mm thick unless otherwise specified in this GMP specification. All test specimens shall be brought to equilib- rium in standard conditions for temperature and moisture and tested in that state as defined in GMW3221 Code A, unless the test method indi- cates 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. Tests shall be conducted on dry-as-molded, unannealed test specimens. 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. 3.1.2 Chemical Requirements. All parts manu- factured from molding compounds shall be re- sistant to the media they contact, such as ali- phatic and aromatic hydrocarbons, fuels, lubri- cants, oils, greases and alcohols, at their places of use. Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 20:09:10 MDTNo reproduction or networking permitted without license from IHS -,-,- GMP.PE.011 GM ENGINEERING STANDARDS 3.1.3 Mechanical Requirements. See Table 1. Table 1: Mechanical Requirements Mechanical Proper- ties Standard Unit Value Tensile Stress at yield ASTM D638, Type I bar, 50 mm/minute, die cut or machined MPa 27 min Elongation ASTM D638, Type I bar, 50 mm/minute, die cut or machined % 10 min Flexural Modulus at +22°C ASTM D790, Method I, 1.3 mm/minute, 50 mm span, 3.2 mm thick specimen, tangent calcula- tion, die cut or machined MPa 890 min 3.1.4 Physical Requirements. See Table 2. Table 2: Physical Requirements Physical Properties Standard Unit Value Specific Gravity ASTM D1505 0.94 to 0.98 HDT - 0.45 MPa ASTM D648, unannealed, edgewise °C 64 min 3.2 Performance Requirements. Performance Requirements e.g., flammability, fogging or re- sistance to odor shall be specified on part draw- ings or in component specifications. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 All materials supplied to this specification must comply with the requirements of GMW3001, Rules and Regulations for Mate- rial Specifications. 5.2 All materials supplied to this specification must comply with the requirements of GMW3059, Restricted and Reportable Sub- stances for Parts. 6 Approved Sources Engineering qualification of an approved source is required for this specification. Only sources listed in the GM Materials File (i.e., MATSPC) under this specification number have been quali- fied by engineering as meeting the requirements of this specification. 7 Coding System This material specification shall be referenced in other documents, drawings, VTS, CTS, etc. as follows: GMP.PE.011 8 Release and Revisions 8.1 Release. This material specification origi- nated in February 1991 and was approved by the PE Specialist in 2003. It was first published in October 2003. © Copyright 2003 General Motors Corporation All Rights Reserved Page 2 of 2 October 2003 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 20:09:10 MDTNo reproduction or networking permitted without license from IHS -,-,-