1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 09 28 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.11 & 4 1998 01 26 Activated B. Hennessey Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 3 FLUOROELASTOMER (FKM), 75 IRHD HARDNESS WSD-M2D440-A3
2、1. SCOPE The material defined by this specification is a fluoroelastomer (FKM) material with good resistance to fuels. 2. APPLICATION This specification was released originally for material used in an Intake Manifold Gasket. The material has good resistance to automotive fuels including those that h
3、ave become oxidized (“Sour”). The material is not suitable for use in contact with Flexfuels and/or Oxygenated Fuels when good dimensional stability is required. The material will withstand temperatures up to 150 C for extended periods. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERI
4、ALS 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 Specimens Whenever possible, all test specimens shall be die-cut from the finished parts. When not feasible, specimen
5、s 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, min x 2.0 +/- 0.2 mm 3.5 ORIGINAL PROPERTIES 3.5.1 Hardness, International, IRHD 70 - 80 (ISO 48, Macro metho
6、d) 3.5.2 Tensile Strength, min 6 MPa (ISO 37, Die C) 3.5.3 Elongation at Break, min 190% (Test Method according to para 3.5.2) 3.5.4 Modulus at 100% Elongation 2.5 - 5.0 MPa (Test Method according to para 3.5.2) 3.5.5 Compression Set, max 20% (ISO 815, Method B except 25% compression, plied-up speci
7、mens, 70 h at 150 +/- 2 C) ENGINEERING MATERIAL SPECIFICATIONWSD-M2D440-A3Printed 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) 3.6 HEAT AGED (ISO 188, 150 +/- 50 air changes/h, 1000 h at 150 +/- 2
8、 C) 3.6.1 Hardness Change, max +6 3.6.2 Tensile Strength Change, max -20% 3.6.3 Elongation at Break Change, max -50% 3.7 HEAT AGED (ISO 188, 150 +/- 50 air changes/h, 168 h at 200 +/- 2C) 3.7.1 Hardness Change, max +5 3.7.2 Tensile Strength Change, max -20% 3.7.3 Elongation at Break Change, max -35%
9、 3.8 IMMERSION IN ASTM FUEL C (ISO 1817, 70 h at 23 +/- 2 C) 3.8.1 Hardness Change, max -5 IRHD 3.8.2 Tensile Strength Change, max -50% 3.8.3 Elongation at Break Change, max -50% 3.8.4 Volume Change 0 to +15% 3.9 IMMERSION IN ASTM FUEL C +15% METHANOL (ISO 1817, 70 h at 23 +/- 2 C) 3.9.1 Hardness Ch
10、ange, max -16 IRHD 3.9.2 Tensile Strength Change, max -75% 3.9.3 Elongation at Break Change, max -90% 3.9.4 Volume Change 0 to +35% 3.10 IMMERSION IN OXIDIZED FUEL (SOUR FUEL) (ISO 1817, 336 h at 60 C +/- 2 C, PN 180, fuel according to FLTM AZ 105-01) 3.10.1 Hardness Change, max -35 IRHD 3.10.2 Tens
11、ile Strength Change, max -90% 3.10.3 Elongation at Break Change, max -50% ENGINEERING MATERIAL SPECIFICATIONWSD-M2D440-A3Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 3 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 Hardness, Durometer A 65 - 75 (ISO 868, instantaneous, plied-up specimen. Hand held durometers shall not be used).
