1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16426 High Density Polyethylene - Blow Moldable, Low Environmental Stress Cracking Resistance Copyright 2013 General Motors Company All Rights Reserved March 2013 Page 1 of 4 1 Scope 1.1 Material Description. This specification covers the pr
2、operties of a blow moldable high density polyethylene (HDPE) pellet form. 1.2 Symbols. The material abbreviation according to ISO 11469 is PE-HD60 Tensile Modulus ISO 527-1/2 (1 mm/minimum) MPa 900 700 700 Vicat Softening Temperature ISO 306 C 75 75 63 Full Notch Creep Test Note 2 ISO 16770 h Report
3、 Report Report Environmental Stress Cracking Note 2 ISO 1872-2, Table 4, Condition B, F50, 100% Igepal, a nonionic surfactant h 75 20 20 Note 1: Standard test specimen and test setup should follow GMW3013. Note 2: Either test shall be run to determine the level of stress crack resistance. 3.3 Requir
4、ements on Test Specimens. Unless otherwise specified, compression molding of test specimens shall be accomplished per ISO 1872-2. Test methods and specimen dimensions are also to be in accordance with ISO 1872-2. All tests shall be performed on specimens 40 h minimum after molding and immediately fo
5、llowing a conditioning period of 24 h minimum in a controlled atmosphere per GMW3221, Code A unless otherwise specified. All tests shall be performed on unannealed specimens. The values specified in Table 1 shall be met by test specimens in natural or black. 3.3.1 Chemical Requirements. All parts ma
6、nufactured from molding compounds shall be resistant to the media they contact at their place of use. 3.4 Compound Properties. See Table 1. The following are also required for full specification approval. The minimum number of lots per test required is one in natural: Poissons Ratio, Stress/Strain C
7、urve at +23 C. See GMW3013 for the test procedures. 3.5 Performance Requirements. Performance requirements shall be specified on part drawings or in component specifications. 4 Manufacturing Process Not applicable. Copyright General Motors Company Provided by IHS under license with General Motors Co
8、mpanyNot for ResaleNo reproduction or networking permitted without license from IHSGM WORLDWIDE ENGINEERING STANDARDS GMW16426 Copyright 2013 General Motors Company All Rights Reserved March 2013 Page 3 of 4 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, r
9、ules, 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 specification
10、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, location of manufac
11、ture, 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 materials and/or p
12、rocesses 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 Engineering department
13、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 compliance with the Glo
14、bally 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 Sheet guidance do
15、cuments 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 materials can be found
16、 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 made to use a n
17、ot yet approved material, contact Materials Engineering 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 approved materials for corresponding GM
18、Engineering Standards. 7.2 Acronyms, Abbreviations, and Symbols. GHS Globally Harmonized System of Classification and Labeling of Chemicals HDPE High Density Polyethylene HVAC Heating, Ventilation, Air Conditioning MSDS Material Safety Data Sheet PPAP Production Part Approval Process SDS Safety Data
19、 Sheet 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW16426P-PE-TX Where: GMW = GM Worldwide 16426 = Sequential number Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for Resale-,-,-GM WO
20、RLDWIDE ENGINEERING STANDARDS GMW16426 Copyright 2013 General Motors Company All Rights Reserved March 2013 Page 4 of 4 P = Plastics PE = Polyethylene TX = Type defined in Section 1.4 9 Release and Revisions This standard was originated in October 2010. It was first approved by the Global Plastics T
21、eam in February 2011. It was first published in February 2011. Issue Publication Date Description (Organization) 1 FEB 2011 Initial publication. 2 MAR 2013 Addition of Type 3 Low Elongation Recycled Material. (Plastics Global Subsystem Leadership Team) Cross Reference of Replaced Material Coding GMW
22、16426 Material Codes Formerly Identified As GMW16426P-PE-T1 GMP.PE.060 (GMNA) GMW16426P-PE-T2 GMP.PE.003 (GMNA) GMP.PE.004 (GMNA) GMW16426P-PE-T3 GMP.PE.023 Note 1 Note 1: This number is referenced in MATSPC. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS
