1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 09 14 Revised Para 3.0 inserted; para 3 revised; para 3.1, 3.2, 3.3, 3.11, 3.12 & 4 deleted 2001 03 05 Revised Revised Para 3.4.5 Note & updated B. Hennessey1992 07 08 Released C10227412 P. ThomasPrinted copies are uncontrolled Copyright
2、2004, Ford Global Technologies, LLC Page 1 of 4 THERMOPLASTIC ELASTOMER (TEO) WSD-M2D378-A4 POLYOLEFIN, EPDM RUBBER MODIFIED MODERATE HEAT RESISTANT 48 DUROMETER A HARDNESS 1. SCOPE The material defined by this specification is a thermoplastic elastomer with a nominal instantaneous Durometer A hardn
3、ess of 48 having good long term resistance to heat at temperatures up to 125 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 a steering column floor seal. 3. REQUIREMENTS 3.0 S
4、TANDARD 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 otherwise specified, all test shall be conducted on sp
5、ecimens 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 otherwise. 3.4.2 Density 0.91 - 1.01 g/cm3(ISO 1183
6、, Method A/ASTM D 792, Method A1) 3.4.3 Hardness, International 48 - 58 (ISO 48/ASTM D 1415) 3.4.4 Hardness, Durometer A 43 - 53 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen.) 3.4.5 Tensile Strength, min 1.9 MPa (ISO R 527, type 2/ASTM D 412, Die C, 500 mm/minute test speed. Measured Paral
7、lel to Flow) 3.4.6 Elongation at Break, min 100% (Test acc. to para 3.4.5) ENGINEERING MATERIAL SPECIFICATIONWSD-M2D378-A4Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 4 3.4.7 Modulus at 100% Elongation, min 1.4 MPa (Test acc. to para 3.4.5) 3.4.8 Tear Stren
8、gth, min 7.0 kN/m (ISO 34, Method B, procedure A/ ASTM D 624, Die C) 3.4.9 Compression Set, max (ISO 815, Large Type-plied specimen/ ASTM D 395, Method B, Type 1 plied specimen) 3.4.9.1 22 h at 70 +/- 1 C 30% 3.4.9.2 70 h at 125 +/- 2 C 55% 3.4.10 Brittleness Point, max -60 C (ISO 812, Type B specim
9、en/ ASTM D 2137, Method A) 3.4.11 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 +/- 2 C. Unaged property values shall be determined at the time of the aged properties dete
10、rmination.) 3.5.1 Hardness Change, max +10 3.5.2 Tensile Strength Change, max +/- 30% 3.5.3 Elongation Change, max +/- 30% 3.6 IMMERSION IN OIL NO. 1 (ISO 1817/ASTM D 471, 168 h at 125 +/- 2 C) 3.6.1 Hardness Change, max -25 3.6.2 Tensile Strength Change, max -55% 3.6.3 Elongation Change, max -75% 3
11、.6.4 Volume Change, max +120% ENGINEERING MATERIAL SPECIFICATIONWSD-M2D378-A4Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 4 3.7 IMMERSION IN OIL NO. 3 (ISO 1817/ASTM D 471, 168 h at 125 +/- 2 C) 3.7.1 Hardness Change, max -35 3.7.2 Tensile Strength Change,
12、max -75% 3.7.3 Elongation Change, max -95% 3.7.4 Volume Change, max +190% 3.8 IMMERSION IN APPROVED GREASE OF AFFECTED MODEL YEAR (see para 5.4) (FLTM BP 117-01, 1,000 h at 100 +/- 2 C) 3.8.1 Hardness Change, max -25 3.8.2 Tensile Strength Change, max -55% 3.8.3 Elongation Change, max -75% 3.8.4 Vol
13、ume Change, max +120% 3.9 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 Formation of clear film, droplets or crystals is cause for rejection. 3.10 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required f
14、or 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 clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR 350 THERMAL EXPANSION, E-6/C(ASTM D 696) ENGINEERING
15、MATERIAL SPECIFICATIONWSD-M2D378-A4Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 4 of 4 5.2 MOLD SHRINKAGE (ISO 2577, 150 x 100 x 2.0 +/- 0.2 mm injection molded specimen) 5.2.1. Molding Shrinkage After 48 h at 23 +/- 2 C . Length 0.039 mm/mm . Width 0.025 mm/mm
16、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 40 - 50 (ISO 868/ASTM D 2240, 5 second delay, plied-up specimen) 5.4 For information on currently approved greases for use in this specification contact:
17、Materials Technology Centre, GB15/GM Fluids Materials Section Product Develoment 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
