1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 11 N-STATUS Replaced by WSE-M2D53-A2 C. Mracna, NA 2004 06 29 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.14 & 4 deleted 1993 10 12 Released NE01E10127076101 E.J. Duda Printed copies are uncontrolled Copyright 2009, Ford Global Te
2、chnologies, LLC Page 1 of 4 FLUOROELASTOMER (FKM), VALVE STEM SEAL WSE-M2D53-A4 NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a heavy duty fluoroelastomer with excellent oil heat, tear resistance and compression set suitable for long term, high oil temperature
3、service conditions. 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 Compa
4、nys 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 same material a
5、nd 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 3.5 ORIGINAL PROPERTIES 3.5.1 Density 2.01 - 2.07 (ISO 1183, Method A/ASTM D 297) g/cm33.5.2 Hardness, International 75 - 85 (ISO 48/ASTM D 1415) 3.5.3 Har
6、dness, Durometer A 77 - 87 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen. Hand held durometers shall not be used) 3.5.4 Tensile Strength, min 11 MPa (ISO 37/ASTM D 412, Die C) 3.5.5 Elongation at Break, min 125% (Test Method according to para 3.5.4) ENGINEERING MATERIAL SPECIFICATIONWSE-M2D
7、53-A4 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 4 3.5.6 Modulus at 100% Elongation 8.5 - 15.0 MPa (Test Method according to para 3.5.4) 3.5.7 Tear Strength, min 25 kN/m (ISO 34, Method B, procedure (a)/ ASTM D 624, Die C) 3.5.8 Brittleness Point, max -12
8、 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 Compression Set, max 35% (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up specimens, 70 h at 150 +/- 2 C) 3.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air cha
9、nges/h, 1000 h at 150 +/- 2 C) 3.6.1 Hardness Change -5 to + 8 3.6.2 Tensile Strength Change, max -15% 3.6.3 Elongation Change, max -30% 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.
10、1 Hardness Change -4 to + 2 3.7.2 Tensile Strength Change, max -18 to + 20% 3.7.3 Elongation Change, max -40 to + 5% 3.7.4 Volume Change 0 to + 5% 3.7.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.8 IMMERSION IN OIL NO. 3 (ISO 1817/ASTM D 471, 1000 h at 150 +/
11、- 2 C) 3.8.1 Hardness Change -7 to 0 3.8.2 Tensile Strength Change, max -30% ENGINEERING MATERIAL SPECIFICATIONWSE-M2D53-A4 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 4 3.8.3 Elongation Change, max -37% 3.8.4 Volume Change + 2 to + 15% 3.8.5 Visual Evalua
12、tion No surface tackiness or cracks when folded flat against itself. 3.9 FINISHED PART 3.9.1 Density 2.01 - 2.07 (ISO 1183, Method A/ASTM D 297) g/cm33.9.2 Hardness, International 65 - 79 (ISO 48, ASTM D 1415) 3.9.3 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.10 HEAT AGED (ISO 188
13、/ASTM D 573, 168 h at 150 +/- 2 C) Hardness Change -2 to + 5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.11 IMMERSION IN OIL NO. 1 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) Volume Change 0 - + 8% Visual Evaluation No surface tackiness or cracks when folded f
14、lat against itself. 3.12 IMMERSION IN OIL NO. 3 (ISO 1817/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. 3.13 ADDITIONAL REQUIREMENTS Specific requirements for material and/or manufactured parts shall be
15、specified on the Engineering drawing, Engineering parts specification and/or performance specifications. All critical areas with respect to these properties shall be clearly designated on the Engineering drawing. ENGINEERING MATERIAL SPECIFICATIONWSE-M2D53-A4 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 4 of 4 5. GENERAL INFORMATION The information below is provided for clarification and assistance in meeting the requirements to this specification. 5.1 RECYCLING CODE FKM
