1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 09 21 N-STATUS No Replacement Named, No known use C. Mracna, NA 2004 10 19 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.9, 3.10 & 4 1995 08 10 Activated E. J. Duda Printed copies are uncontrolled Copyright 2009, Ford Global Technologies
2、, LLC Page 1 of 3 SILICONE (VMQ) RUBBER, IMPROVED COMPRESSION WSS-M2D480-A1 SET, LOW VOLATILES, LONG LIFE GASKET NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a high modulus, silicone rubber with low silicone volatiles, good compression set and stress relaxatio
3、n, suitable for high temperature service conditions. 2. APPLICATION This specification was released originally for material used as the second generation best-in-class gasket for use as an oil pan and front cover gaskets. Low volatile silicone rubber is needed to prevent silica contamination of emis
4、sion components. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MATERIAL TESTING 3.4.1 Preparation of Test Specimens Test specimens may be taken
5、 from either test sheets or molded parts. To insure a proper cutting of specimens, backup all test sheets/parts with cardboard or a rubber sheet. The test sheets shall have the following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm. . Tensile Strength per ISO 37/ASTM D 412, die C, full thickness.
6、If the length between the compression limiters is not long enough to accommodate a die C, use a die exactly one-half the dimensions of the die C. . Tear Strength per ISO 34/ASTM D 624, full thickness. . Volume Change - 25 mm x part width x part thickness. . Compression Set - 25 mm long x part width
7、x single thickness minus any skirt. Do not buff any sample including those with a bead, except for compression set. 3.5 ORIGINAL PROPERTIES 3.5.1 Density 1.26 - 1.33 g/cm3(ISO 1183, Method A/ASTM D 297) 3.5.2 Hardness, International 50 - 60 (ISO 48/ASTM D 1415) ENGINEERING MATERIAL SPECIFICATIONWSS-
8、M2D480-A1Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 3 3.5.3 Hardness, Durometer A 45 - 55 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen. Hand held durometers shall not be used) 3.5.4 Tensile Strength, min 5.0 MPa (ISO 37/ASTM D 412, Die C) 3.5.5
9、Elongation at Break, min 400% (Test Method according to para 3.5.4) 3.5.6 Modulus at 100% Elongation 1400 - 2100 kPa (Test Method according to para 3.5.4) 3.5.7 Tear Strength, min 18 kN/m (ISO 34, Method C/ASTM D 624, Die B) 3.5.8 Low Temperature Retraction -40 C (RT-10)(ASTM D 1329) 3.5.9 Ozone Res
10、istance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.5.10 Compression Set, max (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up specimens) 3.5.10.1 22 h at 175 +/- 2 C 30% 3.5.11 Silicone Volatiles, as received at Ford, max 0.80% (FLTM AV 102-01) 3.5.12 Compression Stress Relaxation
11、(ISO 3384/ASTM TBD) Washer sampler # 3, 25% compression 168 h, 150 +/- 2 C in IRM 903 Force Retention, min 6% 3.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 150 +/- 2 C) 3.6.1 Hardness Durometer A Change, max +12 3.6.2 Tensile Strength Change, max -20% 3.6.3 Elongation Change
12、, max -40% 3.6.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. ENGINEERING MATERIAL SPECIFICATIONWSS-M2D480-A1Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 3 3.7 IMMERSION IN OIL IRM 902 (ISO 1817/ASTM D 471, 1000 h at 150
13、 +/- 2 C) 3.7.1 Hardness Durometer A Change, max -18 3.7.2 Tensile Strength Change, max -28% 3.7.3 Elongation Change, max -32% 3.7.4 Volume Change +12% 3.7.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.8 COMPRESSION MODULUS 800 - 1300 kPa (ASTM D 575, Method A, 25% deflection) 5. GENERAL INFORMATION The information below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 RECYCLING CODE VMQ
