1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 09 21 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.11, 3.12 & 4 1990 02 01 Released C01031532 M. SiewertPrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 5 FLUOROELASTOMER (FKM), ROTATING SHAFT OIL
2、SEAL WSK-M2D427-A 1. SCOPE The material defined by this specification is a fluoroelastomer compound. 2. APPLICATION This specification was released originally for material used for rotating shaft oil seals in rear axles. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material sup
3、pliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 SLAB STOCK 3.4.1 Preparation of Test Specimens All tests are to be performed on specimens die-cut from the molded test sheets manufactured from the same material and with equiv
4、alent cure to production parts. The test sheets shall have the following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm 3.4.2 Density 2.27 - 2.33 g/cm3(ISO 1183, Method A/ASTM D 297) 3.4.3 Hardness, International 68 - 78 (ISO 48/ASTM D 1415) 3.4.4 Hardness, Durometer A 68 - 78 (ISO 868/ASTM D 2240,
5、instantaneous, plied-up specimen. Hand held durometers shall not be used) 3.4.5 Tensile Strength, min 9.0 MPa (ISO 37/ASTM D 412, Die C) 3.4.6 Elongation at Break, min 230% (Test Method according to para 3.4.5) 3.4.7 Modulus at 100% Elongation 3.0 - 5.5 MPa (Test Method according to para 3.4.5) 3.4.
6、8 Tear Strength, min 25 kN/m (ISO 34, Method B, procedure a/ ASTM D 624, Die C) ENGINEERING MATERIAL SPECIFICATIONWSK-M2D427-APrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 53.4.9 Brittleness Point, max -12 C (ISO 812, Type B specimen/ ASTM D 2137, Method A)
7、3.4.10 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.4.11 Compression Set, max 20% (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up Type 1 specimens, 70 h at 150 +/- 2 C) 3.5 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 150 +/- 2 C) 3.5.1 Hardness
8、 Change -5 to +5 3.5.2 Tensile Strength Change, max +20% 3.5.3 Elongation Change, max -40% 3.5.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1,000 h at 150 +/- 2 C) 3.6.1 Hardness Change -3 to +6 3.6.2
9、 Tensile Strength Change, max +25% 3.6.3 Elongation Change, max -60% 3.6.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.7 IMMERSION IN OIL No.1 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) 3.7.1 Hardness Change -6 to +4 3.7.2 Tensile Strength Change, max +40% 3.
10、7.3 Elongation Change, max -50% 3.7.4 Volume Change -2 to +1% 3.7.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. ENGINEERING MATERIAL SPECIFICATIONWSK-M2D427-APrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 53.8 IMMERSION I
11、N OIL No.3 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) 3.8.1 Hardness Change -6 to +4 3.8.2 Tensile Strength Change, max +15% 3.8.3 Elongation Change, max -35% 3.8.4 Volume Change +1 to +3% 3.8.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.9 IMMERSION IN APPRO
12、VED REAR AXLE OIL OF AFFECTED MODEL YEAR (ISO 1817/ASTM D 471, 1,000 h at 150 +/- 2 C, see para 5.1) 3.9.1 Hardness Change +8 to +18 3.9.2 Tensile Strength Change, max -50% 3.9.3 Volume Change +1 to +3% 3.9.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.10 FINI
13、SHED PARTS 3.10.1 Hardness 66 - 76 (ISO 48, micro/ASTM D 1415, micro) Test Method: Prepare and mount specimens according to FLTM BP 106-04. The hardness shall be measured between sealing lip edge and spring groove. For each aging test 3 seals are to be cut into two equal parts in an axial direction,
14、 one half part shall be aged and on the other half part the original hardness shall be measured. The average of three hardness measurements on different specimens shall be taken on each half part and be reported. The original and the changed hardness shall be measured on one and the same part. 3.10.
15、2 Heat Aged (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 150 +/- 2 C) Hardness Change -6 to +4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. ENGINEERING MATERIAL SPECIFICATIONWSK-M2D427-APrinted copies are uncontrolled Copyright 2004, Ford Global Techno
16、logies, LLC Page 4 of 53.10.3 Immersion in Oil No.1 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) Hardness Change -6 to +4 Volume Change +1 to +4% Test Method: 0.5 g minimum weight, multiple specimens allowed. Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.10.4 Imm
17、ersion in Oil No.3 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) Hardness Change -6 to +4 Volume Change 0 to +3% Test Method: 0.5 g minimum weight, multiple specimens allowed. Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.10.5 Immersion in Approved Rear Axle Oil o
18、f Affected Model Year (ISO 1817/ASTM D 471, 1,000 h at 150 +/- 2 C, see para 5.1) Hardness Change +14 to +24 Volume Change 0 to +5% Test Method: 0.5 g minimum weight, multiple specimens allowed. Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.10.6 Density 2.27 - 2
19、.33 g/cm3(ISO 1183, Method A/ASTM D 297) 3.10.7 Tensile Permanent Set, max 20% (FLTM BP 116-01, 50% elongation, 22 +/- 2 h at 150 +/- 2 C) % Set = d3-d1 / d2-d1 x 100 d1 = inside diameter, original d2 = inside diameter, elongated state d3 = inside diameter, after test ENGINEERING MATERIAL SPECIFICAT
20、IONWSK-M2D427-APrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 5 of 55. GENERAL INFORMATION The information below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 For information on currently approved service fluid
21、s and other materials required for use in this specification contact: Materials Laboratory GB-13/100 Transmission & Axle Engineering Car Engineering Materials & Fasteners Engineering Ford Motor Co. Ltd. Ford Motor Company Research & Engineering Centre PO Box 2097 Laindon, Basildon Bin 29B Essex SS15 6EE Livonia, MI 48151 England USA Materials Engineering Product Engineering Office Ford Motor Co. of Australia Ltd Princes Highway, Norlane Victoria 3214 Australia
