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    FORD WSS-M2D376-A2-2004 SILICONE RUBBER ENGINE COOLANT AND COMPRESSION STRESS RELAXATION RESISTANT TO BE USED WITH FORD WSS-M99P1111-A 《耐发动机冷却液和压缩应力松弛的硅橡胶 与标准FORD WSS-M99P1111-A.pdf

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    FORD WSS-M2D376-A2-2004 SILICONE RUBBER ENGINE COOLANT AND COMPRESSION STRESS RELAXATION RESISTANT TO BE USED WITH FORD WSS-M99P1111-A 《耐发动机冷却液和压缩应力松弛的硅橡胶 与标准FORD WSS-M99P1111-A.pdf

    1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 09 14 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.10 & 4 deleted 2000 02 16 Activated BHennessey Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 3 SILICONE RUBBER ENGINE COOLANT AND WSS-M2D376-

    2、A2 COMPRESSION STRESS RELAXATION RESISTANT 1. SCOPE The material defined by this specification is a glycol-based silicone rubber compound with good resistance to engine oil. 2. APPLICATION This specification was released originally for material used as an intercooler gasket at temperatures up to pea

    3、k temperatures of 210 C. The material has excellent resistance to compressive stress relaxation at temperatures up to 175 C. The material also has excellent resistance to splitting or bursting under combined conditions of compressive strains up to 60% and temperature up to 210 C. 3. REQUIREMENTS 3.0

    4、 STANDARD REQUIREMENTS FOR PRODUCTION 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 Whenever possible, all test specimens shall be die cut from fin

    5、ished parts. When not feasible, specimens cut from molded test sheets manufactured from the same material and with equivalent cure to molded parts are recommended. The test sheets shall have the following dimensions: 150 x 150 mm, min 2.0 +/- 0.2 mm 3.5 ORIGINAL PROPERTIES 3.5.1 Hardness, Internatio

    6、nal 55 - 65 (ISO 48) 3.5.2 Hardness, Durometer A 55 - 65 (ISO 868, instantaneous, plied-up specimen. Hand held durometers shall not be used) 3.5.3 Tensile Strength, min 6 MPa (ISO 37, Type 1 Dumb-bell) 3.5.4 Elongation at Break, min 200% (Test acc. To para 3.5.3) ENGINEERING MATERIAL SPECIFICATIONWS

    7、S-M2D376-A2Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 3 3.5.5 Modulus at 100% Elongation, min 1.5 to 3.0 MPa (Test acc. To para 3.5.3) 3.5.6 Compression Set, max 50% (ISO 815, Sample A except 25% compression plied-up specimen, 70 h at 175 +/- 2 C) 3.5.7 O

    8、zone Resistance, max Rating 0 (FLTM BP 101-01,) 3.5.8 Low Temperature Brittleness, min -40 C (ASTM D 1329) 3.6 HEAT AGEING (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1,000 h at 175 +/- 2 C) 3.6.1 Hardness Change, max 0 to +10 3.6.2 Tensile Strength Change, % max +/- 10 3.6.3 Elongation Change, %

    9、 max -30% 3.7 HEAT AGEING (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 210 +/- 2 C) 3.7.1 Hardness Change, max 0 to +10 3.7.2 Tensile Strength Change, % max +/- 10 3.7.3 Elongation Change, % max -30% 3.8 IMMERSION IN CURRENTLY RELEASED PRODUCTION ENGINE OIL (ISO 1817/ASTM D 471, 168 h at

    10、125 +/- 2 C see para 5.1) 3.8.1 Hardness Change, max -15 3.8.2 Tensile Strength Change, max -30% 3.8.3 Elongation at Break Change, max -50% 3.8.4 Volume Change, max +10% 3.8.5 Compression Stress Relaxation (FLTM BP 116-02 at 20% compression) Test Method: Measure the initial back-force (Fo) after 30

    11、minutes at 23 +/- 2 C. Age at 175 +/- 2 C and take back-force (Ft) measurements at 23 +/- 2 C after 24, 48, 96, 168 h and thereafter every 168 h until a total elapsed test time of 1,000 h has been completed. ENGINEERING MATERIAL SPECIFICATIONWSS-M2D376-A2Printed copies are uncontrolled Copyright 200

    12、4, Ford Global Technologies, LLC Page 3 of 3 Plot Ft against 10 times in hours Fo Heat Aged (Test Method per para 3.6) F1000/Fo, min 0.30 3.9 FINISHED PARTS 3.9.1 Compression Burst No splits or cracks in any of the samples Test Method: Cut the 4 corners from each of 5 gaskets such that the test piec

    13、es have arms 15 +/- 2 mm in length. Compress between metal plates by 60 +/- 2% of the original thickness. Age for 24 hours at 210 +/- 2 C, cool, release compression and examine both internally and externally. 5. GENERAL INFORMATION The information given below is provided for clarification and assist

    14、ance in meeting the requirements of this specification. 5.1 Purchase departments will ensure that both materials defined in this specification and shipped to any one assembly plant will be produced by one supplier only. For information on currently approved engine oils for use in this specification

    15、contact: Materials Technology Centre 15/GM Fluids Materials Section Research & Engineering Centre Ford Motor Company Laindon, Basildon, P.O.Box 2053 Essex SS15 6EE 21500 Oakwood Boulevard Dearborn, MI 48121, USA Materials Engineering Product Engineering Office Ford Motor Company. Of Australia Ltd. Princes Highway, Norlane Victoria 3214, Australia


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