1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 09 13 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.12 & 4 deleted 1992 02 27 Released C10196100 B. Hennessey Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 3 FLUOROELASTOMER (FKM), HIGH HEAT AN
2、D COMPRESSION WSD-M2D363-A2 STRESS RELAXATION RESISTANT 1. SCOPE The material described by this specification is a fluoroelastomer compound with good long-term resistance to hot air and hot oil up to 175 C and can withstand peak temperatures up to 210 C. The material has excellent resistance to comp
3、ressive stress relaxation at temperatures up to 175 C. 2. APPLICATION This specification was released originally for material used as a Rocker Cover Seal mounted on a metal carrier. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform
4、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 the finished parts. When not feasible, specimens cut from molded test sheets manufactured from the sam
5、e material and with equivalent state of cure to molded parts are recommended. The test sheets shall have the following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm 3.5 ORIGINAL PROPERTIES 3.5.1 Hardness, International 55 - 65 (ISO 48/ASTM D 1415) 3.5.2 Tensile Strength, min 8 MPa (ISO 37/ASTM D 41
6、2, Die C) 3.5.3 Elongation at break, min 250% (Test Method according to para 3.5.2) 3.5.4 Modulus at 100% Elongation 1.5 - 3.5 MPa (Test Method according to para 3.5.2) 3.5.5 Tear Strength, min 10 KN/m (ISO 34, Method B, procedure (a)/ ASTM D 624, Die C) ENGINEERING MATERIAL SPECIFICATIONWSD-M2D363-
7、A2 Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 3 3.5.6 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.5.7 Compression Set, max 35% (ISO 815/ASTM D 395, Method B except 25% compression, plied-up specimens, 22 h at 200 +/- 2 C) 3.5.8 Low Temp
8、erature Brittleness, max -20 C (ISO 812, Type B specimen/ ASTM D 2137, Method A) 3.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 210 +/- 2 C) 3.6.1 Hardness Change 0 to +10 3.6.2 Tensile Strength Change, max -25% 3.6.3 Elongation at Break Change, max -35% 3.6.4 Visual Evaluatio
9、n No surface tackiness or cracks when folded flat against itself. 3.7 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1,000 h at 175 +/- 2 C) 3.7.1 Hardness Change 0 to +10 3.7.2 Tensile Strength Change, max -25% 3.7.3 Elongation at Break Change, max -35% 3.7.4 Visual Evaluation No surface
10、tackiness or cracks when folded flat against itself. 3.8 IMMERSION IN OIL NO. 1 (ISO 1817/ASTM D 471, 168 h at 175 +/- 2 C) 3.8.1 Hardness Change +/- 10 3.8.2 Tensile Strength Change, max -15% 3.8.3 Elongation at Break Change, max -20% 3.8.4 Volume Change 0 to +5% 3.8.5 Visual Evaluation No surface
11、tackiness or cracks when folded flat against itself. ENGINEERING MATERIAL SPECIFICATIONWSD-M2D363-A2 Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 3 3.9 IMMERSION IN ASTM OIL No. 3 (ISO 1817/ASTM D 471, 168 h at 175 +/- 2 C) 3.9.1 Hardness Change +/- 10 3.9.
12、2 Tensile Strength Change, max -20% 3.9.3 Elongation at Break Change, max -30% 3.9.4 Volume Change 0 to +10% 3.9.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.10 COMPRESSION STRESS RELAXATION (ISO 6056 at 35% compression) Test Method: Measure the initial back-
13、force (Fo) after 30 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 1000 h has been completed. Plot Ft against log 10 time in hours. - Fo F1000/Fo, min 0.30 3.11 FINISH
14、ED PART 3.11.1 Compression Burst No splits or cracks in any of the samples Test Method: Cut four 25 mm sections of metal carrier with seal attached from a complete gasket and compress between metal plates to the thickness of the carrier. Age for 24 hours at 210 C, cool, release compression and examine the rubber for splits and cracks. 5. GENERAL INFORMATION The information below is provided for clarification and assistance in meeting the requirements of the specification. 5.1 Hardness, Durometer A 55 - 65 (ISO 868/ASTM D 2240, Instantaneous, plied-up specimen.)
