1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev.0 2017 02 04 Released P. Addis, EU Controlled document at www.MATS Copyright 2017, Ford Global Technologies, LLC Page 1 of 5 FLUOROELASTOMER (FKM), 70 75 IRHD HARDNESS WSS-M2D440-B3 1. SCOPE The material defined by this specification is a
2、 fluoroelastomer (FKM) material with good resistance to fuels and oil. 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 have become oxidized (“Sour”) and to engine oil.
3、The material is not recommended 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 3.1 APPROVED SOURCES This specification requires the use of approved sourc
4、es. Only the sources identified on the Ford Approved Source List (ASL) can be used when this specification is listed on the drawing, CAD file, or other documents. The list of approved sources is located within Ford at or available externally through a Ford Materials Engineer. 3.2 MATERIAL TESTING 3
5、2.1 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 same material and with equivalent cure to molded parts are recommended. The test sheets shall have the fol
6、lowing dimensions: 150 x 150 mm, min x 2.0 0.2 mm 3.2.2 Conditioning and Test Conditions All test values are based on material conditioned for not less than 24 h prior to testing in a controlled environment of 23 +/- 2 C and 50 +/- 5% relative humidity. Testing of the material should occur in the co
7、nditioning environment or soon after removal. 3.3 ORIGINAL PROPERTIES 3.3.1 Hardness, International 68 - 78 IRHD (ISO 48, Macro method) 3.3.2 Tensile Strength at break 6 MPa min (ISO 37, Type 2 Specimen at 500 mm/min) 3.3.3 Elongation at Break 160% min (ISO 37, Type 2 Specimen at 500 mm/min) 3.3.4 M
8、odulus at 100% Elongation 2.5 - 7 MPa (ISO 37, Type 2 Specimen at 500 mm/min) ENGINEERING MATERIAL SPECIFICATION WSS-M2D440-B3 Copyright 2017, Ford Global Technologies, LLC Page 2 of 5 3.3.5 Compression Set 20% max (ISO 815, except 25% compression, Type B, as-molded or plied-up specimens, 70 h at 15
9、0 2 C) 3.3.6 Ozone Resistance Rating 0 max (FLTM BP 101-01, Procedure A) 3.3.7 Low Temperature Brittleness Non-brittle (ISO 812, Type B specimen / ASTM D2137, Method A, after 3 minutes at -25 C) 3.4 HEAT AGED (ISO 188, 150 +/- 50 air changes/h, 1000 h at 150 2 C) 3.4.1 Hardness Change +6 IRHD max 3.
10、4.2 Tensile Strength Change -20% max 3.4.3 Elongation at Break Change -40% max 3.5 HEAT AGED (ISO 188, 150 +/- 50 air changes/h, 168 h at 200 2 C) 3.5.1 Hardness Change +5 IRHD max 3.5.2 Tensile Strength Change -20% max 3.5.3 Elongation at Break Change -35% max 3.6 IMMERSION IN ASTM FUEL C (ISO 1817
11、 70 h at 23 2 C) 3.6.1 Hardness Change -10 IRHD max 3.6.2 Tensile Strength Change -50% max 3.6.3 Elongation at Break Change -50% max 3.6.4 Volume Change 0 to +15% max 3.7 IMMERSION IN ASTM FUEL C +15% METHANOL (ISO 1817, 70 h at 23 2 C) 3.7.1 Hardness 50 IRHD min 3.7.2 Tensile Strength Change -75%
12、max 3.7.3 Elongation at Break Change -90% max 3.7.4 Volume Change 0 to +35% 3.8 IMMERSION IN OXIDIZED FUEL (SOUR FUEL) (ISO 1817, 336 h at 60 C 2 C, PN 180, fuel according to FLTM AZ 105-01) 3.8.1 Hardness 40 IRHD min 3.8.2 Tensile Strength Change -90% max 3.8.3 Elongation at Break Change -40% max E
13、NGINEERING MATERIAL SPECIFICATION WSS-M2D440-B3 Copyright 2017, Ford Global Technologies, LLC Page 3 of 5 3.9 COMPRESSION STRESS RELAXATION IN OIL 10% RSF (SAE J2979, 3000 h at 150 C 2 C (Residual Sealing Force) 25% compression, with the procedure as noted below). Residual sealing force readings: Pe
14、r SAE J2979 take readings at: 1 h ( 5 min), 24 h + weeks 1, 3, 6, 9, 12, 15 and 18 Fluid Changes: Perform fluid changes every 3 weeks, during the test (after sealing force readings) Test Fluids: Engine oil: Factory fill engine oil (use oil specified for each region of use) Full synthetic engine oil
15、Reference oil: ASTM D471 SF105 For recommended regional factory fill and full synthetic engine oils for the Compression Stress Relaxation test, contact Ford Materials Engineering at . 3.10 SUPPLEMENTAL INFORMATION The following curves are to be submitted with the data packages: FTIR plot (picture a
16、nd file*) TGA plot (to 900C) DSC results (-60 to 250C, 10 K/min) Engineering Stress/Strain plot (at 23 C) * File formats: spa ; jdx ; ird ; nic ; spc ; irs ; gaml ; matson formats ENGINEERING MATERIAL SPECIFICATION WSS-M2D440-B3 Copyright 2017, Ford Global Technologies, LLC Page 4 of 5 SAMPLE SUBMIS
17、SION REQUIREMENTS Table 1: Minimum Sample Size Initial Approval New Manufacturing Location for Previously Approved Material Para. Test Minimum Lots Specimens per Lot Total Test Specimens Lots Specimens per lot Total Test Specimens 3.3.1 Hardness, IRHD 1 5 1 1 5 1 3.3.2 Tensile Strength at Break* 3 5
18、 15 1 5 5 3.3.3 Elongation at Break* 3 5 15 1 5 5 3.3.4 Tensile Modulus 1 10 10 1 5 5 3.3.5 Compression Set 3 3 9 1 3 3 3.3.6 Ozone Resistance 1 3 3 3.3.7 Low Temp Brittleness 1 3 3 1 3 3 3.4 Heat Aging 1000 h at 150 2 C 3.4.1 Hardness Change 1 5 1 3.4.2 Tensile Strength Change 1 5 5 3.4.3 Elongatio
19、n Change 1 5 5 3.5 Heat Aging 168 h at 200 2 C 3.5.1 Hardness Change 1 5 1 3.5.2 Tensile Strength Change 1 5 5 3.5.3 Elongation Change 1 5 5 3.6 Immersion in ASTM Fuel C 3.6.1 Hardness Change 1 5 1 3.6.2 Tensile Strength Change 1 5 5 3.6.3 Elongation Change 1 5 5 3.6.4 Volume change 1 5 5 3.7 Immers
20、ion in Fuel C +15% Methanol 3.7.1 Hardness Change 1 5 1 3.7.2 Tensile Strength Change 1 5 5 3.7.3 Elongation Change 1 5 5 3.7.4 Volume change 1 5 5 3.8 Immersion in Sour Fuel 3.8.1 Hardness Change 1 5 1 3.8.2 Tensile Strength Change 1 5 5 3.8.3 Elongation Change 1 5 5 3.9 Compression Stress Relaxati
21、on Semi-synthetic 5W20 Synthetic 5W20 ASTM SF 105 1 1 1 3 3 3 3 3 3 3.10 Curves FTIR TGA DSC Stress/Strain Curve 1 1 1 per test 4.1 Hardness, Shore A 1 5 1 * For these characteristics, the 3 sigma data range should meet the requirement. ENGINEERING MATERIAL SPECIFICATION WSS-M2D440-B3 Copyright 2017
22、 Ford Global Technologies, LLC Page 5 of 5 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications 4.1 HARDNESS, DUROMETER A 65 80 (ISO 86
23、8, instantaneous, plied-up specimen. Hand held durometers shall not be used). 4.2 APPROVAL OF MATERIALS Suppliers desiring approval of their materials shall first obtain an expression of interest from Purchasing, Design or Product Development, and Materials Engineering. The supplier shall submit a c
24、ompleted copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of the Material Specification. Tested material samples must be available for review upon request and kept for a minimum of
25、 one year. Upon request, the supplier will review the associated quality control documents (Process Failure Mode and Effects Analysis, Control Plans, Certification testing) with Ford. 4.3 SUPPLIERS ONGOING RESPONSIBILITY All materials must be equivalent in all characteristics to the material upon wh
26、ich approval was originally granted. Prior to making any changes to the material originally approved, whether or not such changes affect the materials ability to meet the specification requirements, the supplier shall notify the affected Supplier Technical Assistance (STA), Purchasing, and Materials
27、 Engineering activities of the proposed changes (with reasons) by submission of a completed Suppliers Request for Engineering Approval, SREA. For parts and components using Ford Engineering Material Specifications, all samples tested to the specifications for Design Verification (DV), Production Ver
28、ification (PV) and Production Part Approval Process (PPAP) sign off must be kept until Job 1. 4.4 RESTRICTED SUBSTANCE MANAGEMENT STANDARD Substance restrictions imposed by regulations or Company direction applies to the materials addressed by this document. The restrictions are identified in the Restricted Substance Management Standard WSS-M99P9999-A1 which is updated yearly. It is the suppliers responsibility to comply with this standard on a continuing basis through IMDS and or GMAP reporting. 4.5 HISTORY This specification was originally released to replace WSS-M2D440-A3.
