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, 3.5, 3.6 & 4 deleted 1988 11 03 Released NE01E10000474030 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies
2、, LLC Page 1 of 3 SILICONE (VMQ) RUBBER, HIGH TEMPERATURE WSE-M2D393-A RESISTANT, LONG LIFE GASKET NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a low modulus, high elongation silicone rubber with excellent tear resistance and compression set, suitable for long
3、-term, high temperature service conditions. 2. APPLICATION This specification was released originally for material used as the best-in-class gasket for the rocker arm cover and oil pan. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conf
4、orm 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 sheets manufactured from the
5、 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 Density 0.9 - 1.3 g/cm3(ISO 1183, Method A/ASTM D 297) 3.4.3 Hardness, International 35 - 45 (ISO 48/ASTM D 1415) 3.4.4 Hardness, Dur
6、ometer A 35 - 45 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen, hand held durometers shall not be used) 3.4.5 Tensile Strength, min 4.6 MPa (ISO 37/ASTM D 412, Die C) 3.4.6 Elongation at Break, min 500% (Test Method according to para 3.4.5) 3.4.7 Modulus at 100% Elongation 0.6 - 1.7 MPa (Te
7、st Method according to para 3.4.5) ENGINEERING MATERIAL SPECIFICATIONWSE-M2D393-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 3 3.4.8 Tear Strength, min 10 kN/m (ISO 34, Method B, procedure (a)/ ASTM D 624, Die C) 3.4.9 Brittleness Point, max -60 C (ISO 812
8、, Type B specimen/ASTM D 2137, Method A) 3.4.10 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.4.11 Compression Set, max 35% (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up specimens, 168 h at 175 +/- 2 C) 3.4.12 Heat Aged (ISO 188/ASTM D 573, 168 h at 175 +/- 2 C) Ha
9、rdness, Durometer A Change, max +7 Tensile Strength Change, max -12% Elongation Change, max -15% Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.4.13 Heat Aged (ISO 188/ASTM D 573, 1,000 h at 150 +/- 2 C) Hardness, Durometer A Change, max +/- 5 Tensile Strength Ch
10、ange, max -10 to +15% Elongation Change, max +/- 20% Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.4.14 Immersion in ASTM Oil No.1 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) Hardness, Durometer A Change, max -10 Tensile Strength Change, max -20% Elongation Chan
11、ge, max -18% Volume Change +1 to +10% Visual Evaluation ENGINEERING MATERIAL SPECIFICATIONWSE-M2D393-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 3 No surface tackiness or cracks when folded flat against itself. 3.4.15 Immersion in ASTM oil No.3 (ISO 1817/
12、ASTM D 471, 168 h at 150 +/- 2 C) Hardness, Durometer A Change, max -20 Tensile Strength Change, max -62% Elongation Change, max -50% Volume Change, max +58% Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.4.16 Silicone Volatiles, max 0.65% (FLTM AV 102-01, as received at Ford Motor Company)
