1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 10 20 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.9, 3.10 & 4 1995 07 07 Revised 1995 06 30 Activated NE01-E-10127076-161 E. J. DudaPrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 3 SILICONE (VMQ
2、) RUBBER, IMPROVED WSS-M2D487-A1 COMPRESSION SET, 40 DUROMETER, LOW VOLATILES, LONG LIFE GASKET 1. SCOPE The material defined by this specification is a low modulus, low durometer, silicone rubber with low silicone volatiles, good compression set and stress relaxation, suitable for high temperature
3、service conditions. 2. APPLICATION This specification was released originally for material used as the third generation best-in-class gasket for use as oil pan and front cover gaskets. The material can be lightly loaded to impart sound damping and still retain good compression stress relaxation. Low
4、 volatile silicone rubber is needed to prevent silica contamination of emission 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 MATER
5、IAL TESTING 3.4.1 Preparation of Test Specimens Whenever possible, all test specimens shall be die-cut from the finished parts. When not feasible, specimens cut from molded test sheets manufactured from the same material and with equivalent cure to molded parts are recommended. The test sheets shall
6、 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. 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 IS
7、O 34/ASTM D 624, full thickness. . Volume Change -25 mm x part width x part thickness. . Compression Set -25 mm long x part width x single thickness minus any skirt. Do not buff any sample including those with a bead, except for compression set. ENGINEERING MATERIAL SPECIFICATIONWSS-M2D487-A1Printed
8、 copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 3 3.5 ORIGINAL PROPERTIES 3.5.1 Density 1.15 - 1.20 g/cm3(ISO 1183, Method A/ASTM D 297) 3.5.2 Hardness, International 35 - 47 (ISO 48/ASTM D 1415) 3.5.3 Hardness, Durometer A 38 - 48 (ISO 868/ASTM D 2240, instantaneous
9、, plied-up specimen. Hand held durometers shall not be used) 3.5.4 Tensile Strength, min 6.0 MPa (ISO 37/ASTM D 412, Die C) 3.5.5 Elongation at Break, min 500% (Test Method according to para 3.5.4) 3.5.6 Modulus at 100% Elongation 750 - 1450 kPa (Test Method according to para 3.5.4) 3.5.7 Tear Stren
10、gth, min 24 kN/m (ISO 34, Method C/ASTM D 624, Die B) 3.5.8 Low Temperature Retraction -60 C (RT-10) (ASTM D 1329) 3.5.9 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.5.10 Compression Set, max 15% (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up specimens) 3.5.10.1 22
11、 h at 175 +/- 2 C 3.5.11 Silicone Volatiles, as received at Ford, max 0.60% (FLTM AV 102-01) 3.5.12 Compression Stress Relaxation (ISO 3384/ASTM TBD) Washer sampler # 3, 25% compression 1000 h, 150 +/- 2 C in IRM 903 Force Retention 2% ENGINEERING MATERIAL SPECIFICATIONWSS-M2D487-A1Printed copies ar
12、e uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 3 3.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 175 +/- 2 C) 3.6.1 Hardness Durometer A Change, max +15 3.6.2 Tensile Strength Change, max -45% 3.6.3 Elongation Change, max -50% 3.6.4 Visual Evaluation No
13、 surface tackiness or cracks when folded flat against itself. 3.7 IMMERSION IN OIL IRM 902 (ISO 1817/ASTM D 471, 1000 h at 150 +/- 2 C) 3.7.1 Hardness Durometer Change, max -10% 3.7.2 Tensile Strength Change, max -35% 3.7.3 Elongation Change, max -40% 3.7.4 Volume Change +15% 3.7.5 Visual Evaluation
14、 No surface tackiness or cracks when folded flat against itself. 3.8 COMPRESSION MODULUS 500 - 1100 kPa (ASTM D 575, Method A, 25% deflection) 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
