1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 27 N-STATUS Replaced by WSS-M2D53-B3 2004 09 16 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.6, 3.7 & 4 deleted 1989 03 09 Released NE01-E-10000474-037 E. J. Duda Printed copies are uncontrolled Copyright 2009, Ford Global Technolo
2、gies, LLC Page 1 of 4 FLUOROELASTOMER (FKM), OIL SEAL VALVE STEM WSE-M2D392-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a heavy duty fluoroelastomer with excellent oil resistance and compression set suitable for long-term, high temperature service condition
3、s. 2. APPLICATION This specification was released originally for material used for valve stem seals where stability at high oil temperature is required. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requ
4、irements 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 same material and with equivalen
5、t 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 2.05 - 2.11 g/cm3(ASTM D 297) 3.4.3 Hardness, International 64 - 75 (ASTM D 1415) 3.4.4 Hardness, Durometer A 67 - 77 (ASTM D 2240, instantaneous, plied-up sp
6、ecimen) 3.4.5 Tensile Strength, min 9 MPa (ASTM D 412, Die C) 3.4.6 Elongation at Break, min 200% (Test Method according to para 3.4.5) 3.4.7 Modulus at 100% Elongation 4.0 - 8.5 MPa (Test Method according to para 3.4.5) ENGINEERING MATERIAL SPECIFICATIONWSE-M2D392-APrinted copies are uncontrolled C
7、opyright 2009, Ford Global Technologies, LLC Page 2 of 4 3.4.8 Tear Strength, min 14.5 kN/m (ASTM D 624, Die C) 3.4.9 Brittleness Point, max -8 C (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 30% (ASTM D 395, Method B, except
8、25% compression, plied-up specimens, 70 h at 150 +/- 2 C) 3.4.12 Heat Aged (ASTM D 573, 168 h at 175 +/- 2 C) Hardness Change -1 to +5 Tensile Strength Change -5 to +20% Elongation Change -40 to 0% Modulus at 100% Elongation Change, max +50% Visual Evaluation No surface tackiness or cracks when fold
9、ed flat against itself. 3.4.13 Heat Aged (ASTM D 573, 1,000 h at 150 +/- 2 C) Hardness Change -5 to +9 Tensile Strength Change, max -40% Elongation Change, max -38% Modulus at 100% Elongation Change, max -25% Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.4.14 Im
10、mersion in ASTM Oil No.1 (ASTM D 471, 168 h at 150 +/- 2 C) Hardness, Durometer A Change -3 to +2 Tensile Strength Change -5 to +25% Elongation Change -40 to 0% Modulus at 100% Elongation Change, max -35% Volume Change -2 to +3% ENGINEERING MATERIAL SPECIFICATIONWSE-M2D392-APrinted copies are uncont
11、rolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.4.15 Immersion in ASTM oil No.3 (ASTM D 471, 168 h at 150 +/- 2 C) Hardness, Durometer A Change -7 to 0 Tensile Strength Change -15 to +15% Elongation
12、Change -40 to 0% Modulus at 100% Elongation Change, max -28% Volume Change 0 to +8% Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.4.16 Immersion in ASTM oil No.3 (ASTM D 471, 1,000 h at 150 +/- 2 C) Hardness Change -7 to 0 Tensile Strength Change -32% Elongation
13、 Change -37% Modulus at 100% Elongation Change, max -20% Volume Change +2 to +15% Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.5 FINISHED PART 3.5.1 Density 2.05 - 2.11 g/cm3(ASTM D 297) 3.5.2 Hardness, International 64 - 75 (ASTM D 1415) 3.5.3 Ozone Resistance
14、, max Rating 0 (FLTM BP 101-1, Procedure A) 3.5.4 Heat Aged (ASTM D 573, 168 h at 150 +/- 2 C) Hardness Change -2 to +5 ENGINEERING MATERIAL SPECIFICATIONWSE-M2D392-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 4 of 4 Visual Evaluation No surface tackiness or cr
15、acks when folded flat against itself. 3.5.5 Immersion in ASTM Oil No.1 (ASTM D 471, 168 h at 150 +/- 2 C) Volume Change 0 to +8% Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.5.6 Immersion in ASTM oil No.3 (ASTM D 471, 168 h at 150 +/- 2 C) Volume Change +2 to +12% Visual Evaluation No surface tackiness or cracks when folded flat against itself.
