1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2016 08 31 N Status No usage or replacement L. Sinclair, NA 2004 09 15 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.10, 3.11 & 4 deleted 1994 07 12 Released C10422707 P. Thomas Copyright 2016, Ford Global Technologies, LLC Page 1 o
2、f 4 THERMOPLASTIC ELASTOMER (TEO) WSD-M2D378-A7 POLYOLEFIN, EPDM RUBBER MODIFIED 87 DUROMETER A HARDNESS NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic elastomer with a nominal instantaneous Durometer A hardness of 87 having good long term resist
3、ance to heat at temperatures up to 100 C. Being thermoplastic the material will soften and creep at temperatures exceeding 165 C. 2. APPLICATION This specification was released originally for a material used as suspension gaiters or caps. 3. REQUIREMENTS Material specification requirements are to be
4、 used for initial qualification of materials. 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 MOLDED TEST SPECIMEN 3.4.1 Preparation of Test Specimens Unless oth
5、erwise specified, all test shall be conducted on specimens die cut from injection molded plaques 150 x 100 x 2.0 +/- 0.2 mm. The plaques shall be molded according to ISO 294 and film gated along the upper 100 mm edge and preceded by a 0.8 mm diameter pin gate. No annealing allowed, unless specified
6、otherwise. 3.4.2 Density, +/- 0.05 g/cm3 0.98 (ISO 1183, Method A/ASTM D 792, Method A1) 3.4.3 Hardness, Durometer A 82 - 92 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen.) 3.4.4 Tensile Strength, min 5.3 MPa (ISO R 527, type 2/ASTM D 412, Die C, 500 mm/minute test speed. Measured Parallel
7、to Flow) 3.4.5 Elongation at Break, min 370% (Test acc. to para 3.4.4) ENGINEERING MATERIAL SPECIFICATION WSD-M2D378-A7 Copyright 2016, Ford Global Technologies, LLC Page 2 of 4 3.4.6 Modulus at 100% Elongation, min 4.5 MPa (Test acc. to para 3.4.4) 3.4.7 Tear Strength, kN/m, min (ISO 34, Method B,
8、procedure a/ ASTM D 624, Die C, tear direction as below) Parallel to Flow 35 Perpendicular to Flow 30 3.4.8 Compression Set, %, max (ISO 815, Large Type-plied specimen/ ASTM D 395, Method B, Type 1 plied specimen) 3.4.8.1 22 h at 70 +/- 1 C 75 3.4.8.2 70 h at 100 +/- 2 C 80 3.4.9 Brittleness Point,
9、C, max -50 (ISO 812, Type B specimen/ ASTM D 2137, Method A) 3.4.10 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A, tensile specimen, at 20% elongation) 3.5 HEAT AGING (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1,000 h at 125 +/- 1 C. Unaged property values shall be determined at th
10、e time of the aged properties determination.) 3.5.1 Hardness Change, max +10 3.5.2 Tensile Strength Change, %, max +/- 25 3.5.3 Elongation Change, %, max +/- 60 3.6 IMMERSION IN OIL NO. 1 (ISO 1817/ASTM D 471, 168 h at 100 +/- 2 C) 3.6.1 Hardness Change, max -30 3.6.2 Tensile Strength Change, %, max
11、 -50 3.6.3 Elongation Change, %, max -70 3.6.4 Volume Change, %, max +70 ENGINEERING MATERIAL SPECIFICATION WSD-M2D378-A7 Copyright 2016, Ford Global Technologies, LLC Page 3 of 4 3.7 IMMERSION IN CURRENTLY RELEASED PRODUCTION ENGINE COOLANT 50/50% V/V MIXTURE WITH WATER (FLTM BO 130-01, 1,000 h at
12、125 +/- 2 C, see Para 5.4) 3.7.1 Hardness Change, max +/- 10 3.7.2 Tensile Strength Change, %, max +/- 20 3.7.3 Elongation Change, %, max -75 3.7.4 Volume Change, %, max 0/+10 3.8 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 70 Fo
13、rmation of clear film, droplets or crystals is cause for rejection. 3.9 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.5 +/- 0.1 mm with a smooth surface. 5. GENERAL INFORMATION The information given below is provided for clarif
14、ication and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL 245 EXPANSION, E-6/C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, 150 x 100 x 2.0 +/- 0.2 mm injection molded specimen) ENGINEERING MATERIAL SPECIFICATION WSD-M2D378-A7 Copyright 2016, Ford Glob
15、al Technologies, LLC Page 4 of 4 5.2.1 Molding Shrinkage After 48 h at 23 +/- 2 C, mm/mm . Length 0.020 . Width 0.016 5.2.2 Post Shrinkage (Separate specimens required for each test) After 48 h at 110 +/- 2 C . Length 0.006 . Width 0.006 5.3 HARDNESS, DUROMETER A 80 - 90 (ISO 868/ASTM D 2240, 5 seco
16、nd delay, plied-up specimen) 5.4 For information on currently approved greases for use in this specification contact: Materials Technology Centre, GB 15/GM Fluids Materials Section Product Development Europe Greases Dunton Technical Centre 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 5.5 RECYCLING CODE TEO
