1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW15176 Elastomer Seals for Fuel Caps 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 perform
2、ance of elastomeric sealings, used in the screw locking or bayonet fuel cap. 1.1 Material Description. Materials covered by this specification are divided into six types. 1.1.1 Type A. Nitrile Rubber Butadiene (NBR), sealing against the filler neck. 1.1.2 Type B. Fluorocarbon Rubber (FKM), internal
3、gasket. 1.1.3 Type C. Elastomer, sealing against environmental influence. 1.1.4 Type D. Fluorocarbon rubber, sealing against the filler neck (SAE J200 M3HK 607 A1-10B37). 1.1.5 Type E. Fluorocarbon rubber internal gasket (SAE J200 M2HK 710 A1-10B38). 1.1.6 Type F. Drawing defined (e.g., using SAE J2
4、00 or ASTM D2000 line callout). 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 188 ISO 1817 ISO
5、37 ISO 815 ISO 23529 ISO 48 ISO 1431-1 SAE J200 2.2 GM Standards/Specifications. 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 p
6、ieces shall be in accordance with the relevant test method. 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. C
7、onditioning 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 eq
8、uipment 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. Copyright General Motors Company Provided by IHS under license with General M
9、otors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15176 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 2 of 4 3.1.7 Deviations. Deviations from the requirements of this standard shall h
10、ave 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. Table 1: Material and Performance Properties Property Test Method Unit Value Ha
11、rdness Type A ISO 48 Method M IRHD 70 5 Type B ISO 48 Method M (measured on cross section) IRHD 75 5 Type C ISO 48 Method M IRHD 75 5 Type D ISO 48 Method M IRHD 60 5 Type E ISO 48 Method M IRHD 70 5 Type F As specified on drawing/math data file Shore A As specified on drawing Elongation at Break Ty
12、pe B ISO 37, on complete part 500 mm/minute 50 mm/minute % 250 minimum Type C ISO 37, on complete part 500 mm/minute 50 mm/minute % 250 minimum Type F As specified on drawing/math data file % As specified on drawing Age Resistance (Heat Aging) Type A, and C ISO 188 Method B, 168 h -2 h at +70 C 3 C
13、Change of Hardness IRHD 10 maximum Type B ISO 188 Method B, 168 h -2 h at +100 C 3 C Change of Hardness IRHD +10 maximum Type D, E ISO 188 Method B, 72 h -2 h at +250 C 3 C Change of Hardness IRHD +10 maximum Type F As specified on drawing/math data file As specified on drawing Fuel Resistance Type
14、A ISO 1817, Liquid 2, 48 h -2 h at +23 C 5 C Test piece thickness 1 mm 0.1 mm Change of volume (15 minutes after removal) Change of Hardness after storage in air for 48 h at +23 C % IRHD +25 maximum -5 to + 10 Type B ISO 1817, Liquid 2, 48 h -2 h at +23 C 5 C whole o-ring Change of volume (15 minute
15、s after removal) bending test after storage in air for 48 h -2 h at +23 C 5 C until opposite points meet % +5 maximum No cracks Type D, E ISO 1817, Liquid C, 72 h -2 h at +23 C 5 C Change of volume Change of Hardness % IRHD 0 to + 10 maximum 5 Type F As specified on drawing/math data file % As speci
16、fied on drawing Compression Set Type A ISO815, +70 C 3 C, 24 h - 2 h, 25% compressed % 40 maximum Type B and C ISO 815, on complete part +70 C 3 C, 24 h -2 h, 25% compressed % 25 maximum Type D ISO 815, +175 C 3 C, 24 h -2 h, 25% compressed % 30 maximum Type E ISO 815, +200 C 3 C, 24 h -2 h, 25% com
17、pressed % 50 maximum Type F As specified on drawing/math data file % As specified on drawing 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
18、 GMW15176 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 3 of 4 Property Test Method Unit Value Ozone Resistance Type C, D, E ISO 1431-1, 50 pphm, 20% strain, 40 C 2 C, visual examination (no magnification) No cracks Type F As specified on drawing/math data file As spe
19、cified on drawing Cold Resistance Type A, C ISO 23529, -30 C 3 C; 5 h -0.2 h Bending test until opposite parts meet No cracks Type B, D, E ISO 23529, -20 C 3 C; 5 h -0.2 h Bending test until opposite parts meet No cracks Type F As specified on drawing/math data file As specified on drawing Surface T
20、reatment for Reduction of Stick Slip Effect Type A Surface chlorinated 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 o
21、f 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 shall be tested for conformity with the requirements of this material specification and approved
22、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 manufacture, etc. If not otherwise agreed, all testing and documentation normally required for initial r
23、elease 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 processes and to apply for a new release. If not otherwise agreed, all release tests shall be repe
24、ated 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 and the supplier. 5.4 Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS). For new product
25、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 Globally Harmonized System of Classification and Labeling of Chemicals (GHS) requirements or other c
26、ountry-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 documents where available. 5.5 All materials supplied to this standard must comply with the require
27、ments of GMW3059, Restricted and Reportable Substances for Parts. 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 GMW15176 Copyright 2012 Ge
28、neral Motors Company All Rights Reserved September 2012 Page 4 of 4 6 Approved Sources Materials supplied to this specification must be approved 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 m
29、aterials. 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 not yet approved material, contact the Elastomers Global Subsystem Leadership Team for details o
30、n 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 Engineering Standards. 7.2 Acronyms, Abbreviations, and Symbols. ASTM
31、 ASTM International FKM Fluorocarbon Rubber GHS Globally Harmonized System of Classification and Labeling of Chemicals IRHD International Rubber Hardness Degree MSDS Material Safety Data Sheet NBR Nitrile Rubber Butadiene PPAP Production Part Approval Process PPHM Parts per Hundred Million SAE SAE I
32、nternational SDS Safety Data Sheet 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW15176 Type “X“ Where: X= Material type as defined in Section 1.1. 9 Release and Revisions This standard was originated in February 2006. It was first a
33、pproved 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 Refresh. (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-,-,-
