1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 02 2015 06 19 Revised See Summary of revisions A. Reaume, NA 2015 03 17 Released Added A2 for engine coolant applications P.Addis, EU and A.Reaume, NA 2014 02 26 Released P.Addis, EU and A.Reaume, NA Controlled document at www.MATS Copyr
2、ight 2015, Ford Global Technologies, LLC Page 1 of 3 PERFORMANCE OF ELASTOMERIC SEALS IN ENGINE OIL WSS-M9P12-A1 PERFORMANCE OF ELASTOMERIC SEALS IN ENGINE COOLANT WSS-M9P12-A2 1. SCOPE The specification defines the basic seal retention requirements for elastomeric materials used as seals for engine
3、 oil and engine coolant. 2. APPLICATION This specification was released originally to cover the basic requirements for all elastomeric engine seal materials. This specification covers only engine oil and engine coolant applications; the testing will be different for other fluids or for hot air. 3. R
4、EQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements for Production Materials (WSS-M99P1111-A). 3.2 COMPRESSION STRESS RELAXATION 3.2.1 Sealing Against Oil (A1 only) 10% RSF (SAE J2979, 3000 h at 150 C
5、 +/- 2 C (Residual Sealing Force) 25% compression, with the procedure as noted below). Residual sealing force readings: Per SAE J2979 take readings initially at 1 hour + 5 minutes, 24 hours, then at weeks 1, 3, 6, 9, 12, 15 and 18. Initial readings at 1 hour + 5 minutes, are taken before the samples
6、 are immersed in fluid. Fluid Changes: Perform fluid changes at weeks 3, 6, 9, 12 and 15 (after sealing force readings) Test Fluids Engine oil: Factory fill engine oil (Use oil specified for each region of use) Engine oil: Full synthetic engine oil Reference oil: ASTM D471 SF 105 For recommended reg
7、ional factory fill and full synthetic engine oils for the Compression Stress Relaxation test, contact Ford Materials Engineering at . Format for data collection must follow Appendix A. An Excel file for Appendix A is available through Ford Materials Engineering. ENGINEERING MATERIAL SPECIFICATION W
8、SS-M9P12-A1 WSS-M9P12-A2 Copyright 2015, Ford Global Technologies, LLC Page 2 of 3 3.2.2 Sealing Against Coolant (A2 only) 10% RSF (SAE J2979, 3000 h at 120 C +/- 2 C (Residual Sealing Force) 25% compression, with the procedure as noted below). Residual sealing force readings: Per SAE J2979 take rea
9、dings initially at 1 hour 5 mins, 24 hours, then at weeks 1, 3, 6, 9, 12, 15 and 18. Initial readings at 1 hour + 5 minutes, are taken before the samples are immersed in fluid. Use a ratio of 255% coolant to 755% air in the pressure vessel; completely immerse CSR fixtures in coolant. Fluid Change: P
10、erform fluid change at week 9 of the test Test Fluids Coolant: (50/50 with water) Factory fill engine coolant (Use coolant specified for each region of use) Local service fill engine coolant (if different) For recommended regional factory and service fill engine coolants for the Compression Stress R
11、elaxation test, contact Ford Materials Engineering at . Format for data collection must follow Appendix A. An Excel file for Appendix A is available through Ford Materials Engineering. 3.3 TRANSITION TEMPERATURE 3.3.1 Glass Transition Temperature -15C max (ASTM D7426, DSC Method, 20 C/minute heatin
12、g rate, nitrogen atmosphere) or use alternate method: 3.3.2 Low Temperature Brittleness Point -25C max (ISO 812, Type B specimen / ASTM D 2137, Method A) 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification.
13、 Contact for questions concerning Engineering Material Specifications. An Excel file of appendix A is available through Ford Materials Engineering. 5. SUMMARY OF REVISIONS 2015 06 19 Changed title in 3.2.1 and 3.2.2 Added initial reading explanation and appendix A reference in 3.2.1 and 3.2.2 Added
14、 Appendix A 2015 03 17: Released A2 Suffix added for seal applications with engine coolant Updated wording for Scope and Application. ENGINEERING MATERIAL SPECIFICATION WSS-M9P12-A1 WSS-M9P12-A2 Copyright 2015, Ford Global Technologies, LLC Page 3 of 3 APPENDIX A Test Fluid: Test Temp:Hours Minimum
15、FR(t)0 10% 100.0%24 10%168 10%504 10%1008 10%1512 10%2016 10%2520 10%3024 10%Room Jig Delta Time in LoadTest Temp. Temp. Temp. Measurement Fluid Deflection AverageDate C C C Hours Run Sample #1 Sample #2 Sample #3 Sample #1 Sample #2 Sample #3 FR(t)2.0 Max Jig # Jig # Jig # Jig # Jig # Jig # %123Med
16、ian123Median123Median123Median123Median123Median123Median123Median123MedianComments:NAF504 504F1008 1008Reaction Force Measurement Data SheetF0 NA NA NATest Material / Duro / Material #:Force RetentionFR(t) = Ft / F0 x 100 %NAF24F16824168Reaction Force RFNF1512 1512F2016 2016F2520 2520F3024 30240.0%10.0%20.0%30.0%40.0%50.0%60.0%70.0%80.0%90.0%100.0%0 1000 2000 3000Force Retained
