1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 27 N-STATUS No Replacement Named C. Mracna, NA 2004 02 19 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.5, 3.6 and 4 deleted, totally revised1989 09 26 NEO1E1000047405 ReleasedPrinted copies are uncontrolled Copyright 2009, Ford Glo
2、bal Technologies, LLC Page 1 of 2 SILICONE RUBBER (VMQ), MEDIUM HARDNESS, HIGH WSE-M2D399-A3 TEMPERATURE, LOW VOLATILE SILICONE, GASKET NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an unmodified silicone rubber (VMQ) of good tear strength, suitable for gaskets
3、 with the ability to perform at service temperatures between - 65 to + 200 C. 2. APPLICATION This specification was released originally for use as oil pan and front cover gaskets. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to
4、 the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MATERIAL TESTING 3.4.1 Preparation of Test Specimens Whenever possible, all test specimens shall be prepared from the finished parts using a “band-knife splitter“ according to ASTM D 3183 and die-cut according to the
5、methods referenced below. The report shall include the method(s) used in specimen preparation and their resultant thickness. When it is not feasible to prepare specimens from finished parts, molded test sheets manufactured from the same material and with equivalent cure to molded parts may be used.
6、The test sheets shall have the following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm 3.4.2 Hardness, International 53 - 65 (ISO 48/ASTM D 1415) 3.4.3 Hardness, Durometer A 55 - 65 points (ISO 868/ASTM D 2240, plied-up specimen) 3.4.4 Tensile Strength, min 6.0 MPa (ISO 37/ASTM D 412, Die C) 3.4.5
7、Elongation at Break, min 225% (Test Method according to para 3.4.4) 3.4.6 Modulus at 100% Elongation 1.4 - 3.5 MPa (Test Method according to para 3.4.4) ENGINEERING MATERIAL SPECIFICATIONWSE-M2D399-A3 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 2 3.4.7 Tea
8、r Strength, min 12 kN/m (ISO 34, Method C, procedure (a)/ASTM D 624, Die B) 3.4.8 Compression Set, max 35% (ISO 815/ASTM D 395, Method B, 25% compression, plied-up specimens, 168 h at 175 C) 3.4.9 Heat Aged (ISO 188/ASTM D 573, 1000 h at 150 C) Hardness Change 0 to + 12 Tensile Strength Change, max
9、 35% Elongation Change, max - 45% 3.4.10 Immersion in IRM 903 Oil (ISO 1817/ASTM D 471, 168 h at 150 C) Hardness Change - 28 to 0 Tensile Strength Change, max - 55% Elongation Change, max - 60% Volume Change + 55% 3.4.11 Silicone Volatiles, max 0.65% (FLTM AV 102-01, as received at Ford Motor Company) 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 RECYCLING CODE VMQ
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