1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW14740 Elastomer for Gaskets Washer Pump, High Pressure Pump 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 t
2、he materials and performance of elastomeric gaskets used in washer pump or high pressure pump applications. 1.1 Material Description. Materials covered by this specification are divided into two types: 1.1.1 Type A. Elastomer. 1.1.2 Type B. Drawing defined (e.g., using SAE J200 or ASTM D2000 line ca
3、llout). 1.2 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 48 ISO 1431-1 ISO 23529 ISO 37 ISO 188 IS
4、O 1817 SAE J200 2.2 GM Standards/Specifications. 9985670 B 040 0218 B 440 0064 GMW3059 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 pie
5、ces shall be in accordance with 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 met
6、hods. 3.1.2 Conditioning. Conditioning shall be as specified in the relevant test method. 3.1.3 Equipment. Conforming to the relevant test methods. 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. Altern
7、ative test facilities and equipment 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 methods. 3.1.7 Deviations. Deviations from the requiremen
8、ts of this specification shall have been 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 IH
9、S under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14740 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 2 of 4 Table 1: Material and Performance Properties
10、Property Test Method Unit Value Hardness Type A ISO 48 Method M IRHD As specified on drawing Type B As specified on drawing/math data file Shore A As specified on drawing Elongation at Break Type A ISO 37, Type 4 dumbbell, 200 mm 20 mm/minute or ring shaped test piece, 500 mm 50 mm/minute % 200 mini
11、mum 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 IRHD + 10 maximum Type B As specified on drawing/math data file - As specified on drawing Ozone Resistance Type A ISO 1431-1, 50 p
12、phm, 40 C 2 C, 20% strain, and visual examination Test only elastomer parts in contact with air. - No cracks permissible Type B As specified on drawing/math data file - No cracks permissible Cold Resistance Type A ISO 23529, -30 C 3 C, 5 h + 1 h, bending test Radius = 1 mm - No cracks Type B As spec
13、ified on drawing/math data file - As specified on drawing Fluid Resistance Note 1 Type A and B ISO 1817, Immersion in Water: 2-Propanol B 040 0218 (1:1), 24 h -2 h at 23 C 5 C Change in Volume % 5 maximum Type A and B ISO 1817, Immersion in Water: Ethanol B 440 0064 (1:1), 24 h -2 h at 23 C 5 C Chan
14、ge in Volume % 5 maximum Type A and B ISO 1817, Immersion in Water: Methanol 9985670 (3:2), 24 h -2 h at 23 C 5 C Change in Volume % 5 maximum Note 1: Washer fluid is regional different; so test in all fluid must be performed. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal
15、 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 between the English and domestic language, the English language shall take precedence. Copyright General Motors Company Provided by I
16、HS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW14740 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 3 of 4 5.3 Inspection and Rejection. Samples of com
17、ponents or materials released to a GM material 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,
18、 e.g., properties, manufacturing process, location 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 inc
19、lude 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 documented by the supplier prior to commencement of delivery of non-conforming bulk supplies. In individual cases, a shorter test can
20、 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 submissions, or when a change in chemical composition of an existing product has occurred, a complete copy of the Material Safety Data Sheet/S
21、afety 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/SDS submissions must be in compliance with specific country General Motors TM
22、C003 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 GMW3059, Restricted and Reportable Substances for Parts. 6 Approved Sources Materials supplied to this specification must be approved
23、 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. If approved material already listed is used, the part supplier can use GM Material File reference for Production Part Approval Process
24、 (PPAP) material approval. If the decision is made to use a not yet approved material, contact the Elastomers Global Subsystem Leadership Team for detail 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
25、7.1 Glossary. MATSPC: Global repository of GM Approved Materials for corresponding GM Engineering Standards. 7.2 Acronyms, Abbreviations, and Symbols. ASTM ASTM International GHS Globally Harmonized System of Classification and Labeling of Chemicals IRHD International Rubber Hardness Degree MSDS Mat
26、erial Safety Data Sheet PPAP Production Part Approval Process Pphm Parts per Hundred Million SAE SAE International SDS Safety Data Sheet 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW14740, Type “X“ Where: X = Material Type as defin
27、ed in 1.1. 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 GMW14740 Copyright 2012 General Motors Company All Rights Reserved September 2012
28、 Page 4 of 4 9 Release and Revisions This standard was originated in October 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 5 Year 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-,-,-
