1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 28 N-STATUS No known use. No Replacement Named C. Mracna, NA 2004 09 27 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.14 & 4 1991 05 01 Released C10136076 B Hennessey Printed copies are uncontrolled Copyright 2009, Ford Global Technol
2、ogies, LLC Page 1 of 3 RUBBER, FLUOROSILICONE (FVMQ) OXIDISED AND OXYGENATED WSD-M2D439-A FUEL RESISTANT, 55 IRHD HARDNESS NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a Fluorosilicone rubber compound with a nominal hardness of 55 IRHD. 2. APPLICATION This spe
3、cification was released originally for material used as in-tank pulse damper seals. The material has good resistance to oxygenated and oxidised fuels and ozone. It has good dimensional stability when immersed in fuel and on drying out. The material remains flexible at -40 C 3. REQUIREMENTS 3.0 STAND
4、ARD REQUIREMENTS FOR PRODUCTION MATERIALS 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 All tests shall be carried out on finished parts. When not feasible,
5、specimens 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 50 - 60 (ISO 48/ASTM D 141
6、5 micro TO BE CARRIED OUT ON FINISHED PARTS ONLY) 3.5.2 Tensile Strength, min 7.0 MPa (ISO 37/ASTM D 412, Die C) 3.5.3 Elongation at Break, min 200% (Test method according to 3.5.2) 3.5.4 Modulus at 100% Elongation, MPa, min. 2.0 (Test method according to 3.5.2) 3.5.5 Compression Set, max 15% (ISO 8
7、15/ASTM D 395, Method B, except 25% compression, plied-up specimens, 70 h at 100 +/- 2 C) ENGINEERING MATERIAL SPECIFICATIONWSD-M2D439-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 3 3.5.6 Brittleness Point, max -50 C (ISO 812, Type B specimen/ASTM D 2137,
8、Method A) 3.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 80 +/- 2 C) 3.6.1 Hardness Change, max +5 3.6.2 Tensile Strength Change, max -10% 3.6.3 Elongation Change, max -25% 3.6.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.7 IMMERSION I
9、N FUEL C (ISO 1817/ASTM D 471, 70 h at 23 +/- 2 C) 3.7.1 Hardness Change, max -15 3.7.2 Tensile Strength Change, max -50% 3.7.3 Elongation Change, max -50% 3.7.4 Volume Change, max 0 to +25% 3.7.4.1 Dry Out, Shrinkage, max -5% (24 h at 80 +/- 2 C, use specimens from 3.7.4) 3.8 IMMERSION IN 85% FUEL
10、C +15% METHANOL (ISO 1817/ASTM D 471, 70 h at 23 +/- 2 C) 3.8.1 Hardness Change, max -15 3.8.2 Tensile Strength Change, max -70% 3.8.3 Elongation Change, max -50% 3.8.4 Volume Change, max 0 to +35% 3.8.4.1 Dry Out, Shrinkage, max -5% (24 h at 80 +/- 2 C, use specimens from 3.8.4) 3.9 IMMERSION IN 10
11、0% METHANOL (ISO 1817/ASTM D 471, 70 h at 23 +/- 2 C) 3.9.1 Hardness Change, max -15 3.9.2 Tensile Strength Change, max -40% ENGINEERING MATERIAL SPECIFICATIONWSD-M2D439-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 3 3.9.3 Elongation Change, max -30% 3.9.4
12、 Volume Change, max 0 to +20% 3.9.4.1 Dry Out, Shrinkage, max -5% (24 h at 80 +/- 2 C, use specimens from 3.9.4) 3.10 IMMERSION IN OXIDIZED FUEL (SOUR GAS) (ISO 1817/ASTM D 471, 70 h at 60 +/- 2 C, PN 90, fuel according to FLTM AZ 105-01) 3.10.1 Hardness Change, max -20 3.10.2 Tensile Strength Chang
13、e, max -70% 3.10.3 Elongation Change, max -55% 3.10.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself after drying out. 3.11 COLD FLEXIBILITY AT -40 C (FLTM BN 102-01, Procedure B) At the end of the aging period there shall be no signs of cracking, or disintegration
14、when examined under 7X power glass. 3.12 OZONE RESISTANCE, max Rating 0 (FLTM BP 101-01) 3.12.1 After conditioning in Fuel C + 15% Methanol Completely immerse suitable lengths of material in 85% Fuel C +15% Methanol for 48 h at 23 +/- 2 C then follow with drying by suspending vertically in a well ve
15、ntilated area for an additional 48 h at 23 +/- 2 C. 3.13 CRYSTALLINE COPPER SALT FORMATION No Crystal formation on the rubber or copper strip. No copper tarnish Test Method: ASTM D 130 (Automotive Gasoline Method), except use 150 mL Fuel C +15% Methanol in a 200 mL test tube. Mount 75 x 12.5 x 2 mm
16、rubber sample parallel but held 10 mm away from the copper strip. Age for 168 h at 23 +/- 2 C. 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 55 - 65 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen.)
