1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 03 10 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.13, and 4 deleted; para 3.9.2, 3.11.2 and 3.11.4 revised J. B. Spencer 1996 08 23 Activated J. B. Spencer Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC
2、 Page 1 of 4 FLUOROELASTOMER (FKM), OXYGENATED/OXIDIZED WSS-M2D401-A9 FUEL RESISTANT 1. SCOPE This specification defines a mineral filled, synthetic rubber material with good resistance to fuel/alcohol blends. The material has good resistance to compressive stress relaxation ensuring long-term seala
3、bility. 2. APPLICATION This specification was released originally for the fuel tank sender plate o-ring. 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-
4、A). 3.4 PHYSICAL PROPERTIES The following tests where possible, shall be performed on specimens cut from molded test sheets manufactured from the same material and with equivalent cure to molded parts. The test sheets shall have the following dimensions: 150 x 150 mm, thickness 2.0 +/- 0.2 mm 3.5 OR
5、IGINAL PROPERTIES 3.5.1 Hardness, International 65 +/- 5 (ISO 48/ASTM D 1415, micro method) 3.5.2 Hardness, Durometer A 65 +/- 5 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen. Hand held durometer shall not be used) 3.5.3 Tensile Strength, min 9.0 MPa (ISO 37/ASTM D 412, Die C) 3.5.4 Elongat
6、ion at Break, min 175% (ISO 37/ASTM D 412, Die C) 3.5.5 Modulus at 100% Elongation, min 2.0 MPa (ISO 37/ASTM D 412, Die C) ENGINEERING MATERIAL SPECIFICATIONWSS-M2D401-A9 Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 4 3.5.6 Compression Set, max 40% (ASTM D
7、395, 70 h at 200 C) 3.5.7 Tear Strength, min 14 kN/m (ISO 34, Method B, Procedure a/ ASTM D 624, Die C) 3.5.8 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.5.9 Low Temperature Flexibility, TR 10 - 5 C (ASTM D 1329) 3.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h
8、at 200 +/- 2 C) 3.6.1 Hardness Change +/- 5 3.6.2 Tensile Strength Change +/- 20% 3.6.3 Elongation at Break Change +/- 20% 3.7 IMMERSION IN FUEL C (ISO 1817/ASTM D 471, 336 h at 60 +/- 2 C) 3.7.1 Hardness Change, Max - 15 3.7.2 Tensile Strength Change, max - 60% 3.7.3 Elongation at Break Change, max
9、 - 40% 3.7.4 Volume Change, max + 20% Test Method: Allow samples, while still in fluid, to cool to 23 +/- 2 C. Samples should be tested immediately after removing from fluid. 3.8 IMMERSION IN OXIDIZED FUEL (FLTM AZ 105-01, PN 180, 336 h at 60 +/- 2 C, fresh fuel every two weeks) 3.8.1 Hardness Chang
10、e, max - 30 3.8.2 Tensile Strength Change, max - 65% 3.8.3 Elongation at Break Change, max - 35% 3.8.4 Volume Change, max + 35% Test Method: Allow samples, while still in fluid, to cool to 23 +/- 2 C. Samples should be tested immediately after removing from fluid. ENGINEERING MATERIAL SPECIFICATIONW
11、SS-M2D401-A9 Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 4 3.9 IMMERSION IN 50% FUEL C AND 50% METHANOL (ISO 1817/ASTM D 471, 2000 h at 60 +/- 2 C, fresh fuel every two weeks) 3.9.1 Hardness Change, max - 25 3.9.2 Tensile Strength Change, max - 70% 3.9.3 E
12、longation at Break Change, max - 40% 3.9.4 Volume Change, max + 35% Test Method: Allow samples, while still in fluid, to cool to 23 +/- 2 C. Samples should be tested immediately after removing from fluid. 3.10 IMMERSION IN 50% FUEL C AND 50% METHANOL (ISO 1817/ASTM D 471, 2000 h at 60 +/- 2 C, follo
13、wed by dry out: ASTM D 573, 48 h at 100 +/- 2 C, fresh fuel every two weeks) 3.10.1 Hardness Change, max - 5 3.10.2 Tensile Strength Change, max - 15% 3.10.3 Elongation at Break Change, max - 15% 3.10.4 Volume Change, max + 5% 3.11 IMMERSION IN 65% FUEL C, 20% METHANOL AND 15% Methyl Tertiary-Butyl
14、Ether (MTBE) (ISO 1817/ASTM D 471, 2000 h at 60 +/- 2 C, fresh fuel every two weeks) 3.11.1 Hardness Change, max - 25 3.11.2 Tensile Strength Change, max - 78% 3.11.3 Elongation at Break Change, max - 45% 3.11.4 Volume Change, max + 47% Test Method: Allow samples, while still in fluid, to cool to 23
15、 +/- 2 C. Samples should be tested immediately after removing from fluid. ENGINEERING MATERIAL SPECIFICATIONWSS-M2D401-A9 Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 4 of 4 3.12 IMMERSION IN 65% FUEL C, 20% METHANOL AND 15% MTBE (ISO 1817/ASTM D 471, 2000 h at
16、60 +/- 2 C followed by dry out: ASTM D 573, 48 h at 100 +/- 2 C, fresh fuel every two weeks) 3.12.1 Hardness Change, max - 10 3.12.2 Tensile Strength Change, max - 20% 3.12.3 Elongation at Break Change, max - 20% 3.12.4 Volume Change, max + 5% 5. GENERAL INFORMATION The information given below is pr
17、ovided for clarification and assistance in meeting the requirements of this specification. 5.1 COMPRESSION STRESS RELAXATION, % RETAINED OF ORIGINAL VALUE (ISO 3384, Method B, at 25% compression and aged at 150 +/- 2 C) Measure the initial back-force (Fo) after 30 minutes at 23 +/- 2 C. Samples are
18、to be aged at 150 +/- 2 C; back-force (Ft) is to be measured at 24, 48, 96, 168 and every 168 h thereafter until 1000 h has been reached. All measurements are to be made when fixture has cooled to 23 +/- 2 C. Ft/Fo x 100, min Hours % Retained 24 50 48 40 96 40 168 35 336 30 504 30 672 30 840 20 1008 10
