1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 09 17 N-STATUS No Replacement Named, No known use. C. Mracna, NA 2004 09 20 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.10, 3.11 & 4 deleted 1993 02 15 Released NE01E10127076078 E. J. Duda Printed copies are uncontrolled Copyright 20
2、09, Ford Global Technologies, LLC Page 1 of 3 SILICONE (VMQ) RUBBER, HIGH TEMPERATURE WSE-M2D418-A2 RESISTANT, OIL GROMMET NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a low modulus silicone rubber with excellent compression set, suitable for long-term, high t
3、emperature, high pressure service conditions. 2. APPLICATION This specification was released originally for material used as the high pressure oil port grommet for cylinder head gaskets. This material has good compression set and heat resistance. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCT
4、ION 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 from either test sheets or molded parts. To insure a proper cutting o
5、f 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. The test sheets must be cured for 10 minutes at 177 C. 3.5 ORIGINAL PROPERTIES 3.5.1 Density 1.31 - 1.37 g/cm3(ISO 1183, Method A/ASTM
6、D 297) 3.5.2 Hardness, International 70 - 80 (ISO 48/ASTM D 1415) 3.5.3 Hardness, Durometer A 67 - 77 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen. Hand held durometers shall not be used) 3.5.4 Tensile Strength, min 6.5 MPa (ISO 37/ASTM D 412, Die C) ENGINEERING MATERIAL SPECIFICATIONWSE-M
7、2D418-A2Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 3 3.5.5 Elongation at Break, min 180% (Test Method according to para 3.5.4) 3.5.6 Modulus at 100% Elongation, min 2.2 MPa (Test Method according to para 3.5.4) 3.5.7 Tear Strength, min 12 kN/m (ISO 34, Me
8、thod B, procedure (a)/ ASTM D 624, Die B) 3.5.8 Brittleness Point, max -60 C (ISO 812, Type B specimen/ ASTM D 2137, Method A) 3.5.9 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.5.10 Stress Relaxation, Sealing Force Retained, min (ISO 6056, Shanbury Wallace compression jigs, aged i
9、n oil #2 at 150 +/- 3 C, test at 23 +/- 2 C) . 168 h 38% . 1,000 h 20% 3.5.11 Silicone Volatiles, max 0.6% (FLTM AV 102-01, as received at Ford Motor Company) 3.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 175 +/- 2 C) 3.6.1 Hardness Durometer A Change +8 3.6.2 Tensile Strengt
10、h Change, max -28% 3.6.3 Elongation Change, max -40% 3.6.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.7 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1,000 h at 150 +/- 2 C) 3.7.1 Hardness Durometer A Change +10 3.7.2 Tensile Strength Change, max -
11、28% 3.7.3 Elongation Change, max -40% 3.7.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. ENGINEERING MATERIAL SPECIFICATIONWSE-M2D418-A2Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 3 3.8 IMMERSION IN OIL No.1 (ISO 1817/A
12、STM D 471, 168 h at 150 +/- 2 C) 3.8.1 Hardness Durometer A Change -12 3.8.2 Tensile Strength Change, max -20% 3.8.3 Elongation Change, max -20% 3.8.4 Volume Change +1 to +8% 3.8.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.9 IMMERSION IN OIL No.2 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) 3.9.1 Hardness Durometer A Change -28 3.9.2 Tensile Strength Change, max -48% 3.9.3 Elongation Change, max -40% 3.9.4 Volume Change, max +5 to +35% 3.9.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself.
