1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 09 14 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.9 & 4 deleted 1996 02 29 Revised Updated and Added para 3.5.8 N. Kurtycz1988 02 25 Release SM/ER 1764 TC B. HennesseyPrinted copies are uncontrolled Copyright 2004, Ford Global Techno
2、logies, LLC Page 1 of 3 ETHYLENE/PROPYLENE RUBBER (EPDM), ENGINE WSD-M2D376-A COOLANT AND COMPRESSION STRESS RELAXATION RESISTANT 1. SCOPE The material described by this specification is an Ethylene/Propylene rubber compound with good resistance to ethylene glycol-based engine coolants. 2. APPLICATI
3、ON This specification was released originally for material used as a radiator tank gasket. The material has excellent resistance to compressive stress relaxation at temperatures up to 125 C. The material also has excellent resistance to splitting or bursting under combined conditions of compressive
4、strains up to 60% and temperatures up to 135 C. 3. REQUIREMENTS 3.0 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 Specim
5、ens 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 equivalent cure to molded parts are recommended. The test sheets shall have the following dimensions: 150 x 150 mm
6、, min x 2.0 +/- 0.2 mm 3.5 ORIGINAL PROPERTIES 3.5.1 Hardness, International 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 12 MPa (ISO 37, Type 1 Dumb-bell) 3.5.4 Elongation at brea
7、k, min 300% (Test Method according to para 3.5.3) ENGINEERING MATERIAL SPECIFICATIONWSD-M2D376-APrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 3 3.5.5 Modulus at 100% Elongation 1.5 to 3.0 MPa (Test Method according to para 3.5.3) 3.5.6 Compression Set, max 2
8、5% (ISO 815, Sample A except 25% compression, plied-up specimen, 70 h at 125 +/- 2 C) 3.5.7 Ozone Resistance, max Rating 0 (FLTM BP 101-01) 3.5.8 Low Temperature Retraction-TR10, C min -40 (ASTM D 1329) 3.6 HEAT AGED (ISO 188, 150 +/- 50 air changes/h, 1,000 h at 125 +/- 2 C) 3.6.1 Hardness Change 0
9、 to +10 3.6.2 Tensile Strength Change, max +/- 10% 3.6.3 Elongation at Break Change, max -35% 3.7 IMMERSION IN CURRENTLY RELEASED PRODUCTION ENGINE COOLANT (FLTM BO 130-01, 1,000 h at 125 +/- 2 C, see para 5.1) 3.7.1 Hardness change -5 to +5 3.7.2 Tensile Strength Change, max -15% 3.7.3 Elongation a
10、t Break Change, max -20% 3.7.4 Volume Change -5 to +10% 3.7.5 Compression Stress Relaxation (FLTM BP 116-02 at 25% compression) Test Method: Measure the initial back-force (Fo) after 30 minutes at 23 +/- 2 C. Age at 125 +/- 2 C and take back-force (Ft) measurements at 23 +/- 2 C after 24, 48, 96, 16
11、8 h and thereafter every 168 h until a total elapsed test time of 1,000 h has been completed. Plot Ft against log 10 time in hours. Fo 3.7.5.1 Heat Aged (Test Method per para 3.6) F1000/Fo, min 0.30 3.7.5.2 Immersion in Engine Coolant (Test Method per para 3.7) F1000/Fo, min 0.35 ENGINEERING MATERIA
12、L SPECIFICATIONWSD-M2D376-APrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 3 3.8 FINISHED PART 3.8.1 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 pieces have arms 15 +/- 2
13、mm in length. Compress between metal plates by 60 +/- 2% of the original thickness. Age for 24 hours at 135 C, cool, release compression and examine both internally and externally. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirem
14、ents of this specification. 5.1 Use 49.75% Coolant Concentrate, 49.75% Distilled Water, 0.5% Hot-Test Stand Coolant Anti-Corrosion Additive ESD-M99B166-A for Ford European Automotive Operations use only. Otherwise, use 50% Coolant Concentrate +50% Distilled Water for all other Ford Operations, or as
15、 stated on the Engineering Drawing. For information on currently approved engine coolants and anti-corrosion additives for use in this specification contact: Materials Laboratory 13/100 Fluids Materials Section Research and Engineering Centre Coolants/Greases Ford Motor Company Ltd Engine Engineering Laindon, Basildon PO BOX 2053 Essex SS15 6EE, England 21500 Oakwood Boulevard Dearborn, MI 48121, USA Materials Engineering Product Engineering Office Ford Motor Co. of Australia Ltd Princes Highway, Norlane Victoria 3214, Australia
