1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 27 N-STATUS No Replacement Named C. Mracna, NA 2004 09 16 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.10, 3.11 & 4 deleted 1991 08 09 Released C10155131 B. Hennessey Printed copies are uncontrolled Copyright 2009, Ford Global Tech
2、nologies, LLC Page 1 of 3 SILICONE (VMQ) RUBBER, HIGH TEMPERATURE WSD-M2D393-A2 RESISTANT, HIGH ELONGATION, 45 HARDNESS (IRHD), LONG-LIFE GASKET NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a high elongation silicone rubber with excellent tear and compression
3、set resistance, suitable for long-term, high temperature service conditions. It has a higher hardness, tensile strength and tear resistance than WSE-M2D393-A and should be used where these enhanced properties are required at the possible expense of NVH performance. The material has a low volatile si
4、licone content and so will not cause silica contamination of emission control components. 2. APPLICATION This specification was released originally for material used as the gaskets for the rocker cover and oil pan. 3. REQUIREMENTS STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and
5、 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 Whenever possible, all test specimens shall be die-cut from the finished parts. When not feasible, specimens cut from molded test she
6、ets manufactured from the same material and with equivalent cure to molded parts are recommended. The test sheets shall have the following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm 3.4.2 Hardness, International 40 - 50 (ASTM D 1415, macro) 3.4.3 Hardness, Durometer A 40 - 50 (ISO 868/ASTM D 224
7、0, instantaneous, plied-up specimen. Hand held durometers shall not be used) 3.4.4 Tensile Strength, min 6.0 MPa (ISO 37/ASTM D 412, Die C) 3.4.5 Elongation at Break, min 700% (Test Method according to para 3.4.4) 3.4.6 Modulus at 100% Elongation 0.7 - 1.5 MPa (Test Method according to para 3.4.4) E
8、NGINEERING MATERIAL SPECIFICATIONWSD-M2D393-A2Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 3 3.4.7 Tear Strength, min 25 kN/m (ISO 34, Method B, procedure (a)/ ASTM D 624, Die C) 3.4.8 Brittleness Point, max -50 C (ISO 812, Type B specimen/ASTM D 2137, Meth
9、od A) 3.4.9 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.4.10 Compression Set, max 40% (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up specimens, 168 h at 175 +/- 2 C) 3.5 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 175 +/- 2 C) 3.5.1 Hardness,
10、 Change, max +10 3.5.2 Tensile Strength Change, max -15% 3.5.3 Elongation Change, max -30% 3.5.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1,000 h at 150 +/-2 C) 3.6.1 Hardness, Change, max +10 3.6.2
11、 Tensile Strength Change, max -15% 3.6.3 Elongation Change, max -35% 3.6.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.7 IMMERSION IN OIL No.1 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) 3.7.1 Hardness, Change, max -10 3.7.2 Tensile Strength Change, max -20% 3
12、7.3 Elongation Change, max -35% 3.7.4 Volume Change 0 to +40% ENGINEERING MATERIAL SPECIFICATIONWSD-M2D393-A2Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 3 3.7.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.8 IMMERSIO
13、N IN OIL No.3 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) 3.8.1 Hardness, Change, max -25 3.8.2 Tensile Strength Change, max -75% 3.8.3 Elongation Change, max -60% 3.8.4 Volume Change, max +50% 3.8.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.9 FINISHED PART REQUIREMENT 3.9.1 Silicone Volatiles, as received at Ford, max 0.65% (FLTM AV 102-01)
