1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 09 27 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.11, 3.12 & 4 1993 12 01 Revised EP00E10258833000 K.Gerhards 1992 08 03 Released EP00E10176303000 K. GerhardsPrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC
2、 Page 1 of 5 FLUOROELASTOMER (FKM), ROTATING SHAFT OIL SEAL WSK-M2D427-A2 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 engines. 3. REQUIREMENTS 3.0 STANDA
3、RD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers 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 shee
4、ts manufactured from the same material and with equivalent 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 1.97 - 2.05 g/cm3(ISO 1183, Method A/ASTM D 297) 3.4.3 Hardness, International 66 - 80 (ISO 48/ASTM D 1415) 3.4.4
5、 Hardness, Durometer A 69 - 80 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen. Hand held durometers shall not be used) 3.4.5 Tensile Strength, min 12.0 MPa (ISO 37/ASTM D 412, Die C) 3.4.6 Elongation at Break, min 190% (Test Method according to para 3.4.5) 3.4.7 Modulus at 50% Elongation, mi
6、n 1.4 MPa (Test Method according to para 3.4.5) 3.4.8 Tear Strength, min 30 kN/m (ISO 34, Method B, procedure a/ASTM D 624, Die C) ENGINEERING MATERIAL SPECIFICATIONWSK-M2D427-A2Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 5 3.4.9 Brittleness Point, max -15
7、 C (ISO 812, Type B specimen/ASTM D 2137, Method A) 3.4.10 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.4.11 Compression Set, max 30% (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
8、 air changes/h, 168 h at 150 +/- 2 C) 3.5.1 Hardness Change, max +/- 2 3.5.2 Tensile Strength Change, max -15% 3.5.3 Elongation Change, max -25% 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
9、h at 150 +/- 2 C) 3.6.1 Hardness Change -2 to +4 3.6.2 Tensile Strength Change, max -15% 3.6.3 Elongation Change, max -30% 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 Chan
10、ge -4 to +1 3.7.2 Tensile Strength Change, max -20% 3.7.3 Elongation Change, max -15% 3.7.4 Volume Change -1 to +2% 3.7.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. ENGINEERING MATERIAL SPECIFICATIONWSK-M2D427-A2Printed copies are uncontrolled Copyright 2004, F
11、ord Global Technologies, LLC Page 3 of 5 3.8 IMMERSION IN OIL No.3 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) 3.8.1 Hardness Change -6 to +1 3.8.2 Tensile Strength Change, max -25% 3.8.3 Elongation Change, max -25% 3.8.4 Volume Change +1 to +5% 3.8.5 Visual Evaluation No surface tackiness or cracks
12、 when folded flat against itself. 3.9 IMMERSION IN APPROVED ENGINE 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 +/- 3 3.9.2 Tensile Strength Change, max -30% 3.9.3 Elongation Change, max -40% 3.9.4 Volume Change 0 to +3% 3.9.5 Visual Ev
13、aluation No surface tackiness or cracks when folded flat against itself. 3.10 FINISHED PARTS 3.10.1 Hardness 68 - 75 (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
14、 each aging test 3 seals are to be cut into two equal parts in an axial direction, 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 o
15、riginal and the changed hardness shall be measured on one and the same part. 3.10.2 Heat Aged (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 150 +/- 2 C) Hardness Change, max +5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. ENGINEERING MATERIAL SPECIFICAT
16、IONWSK-M2D427-A2Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 4 of 5 3.10.3 Immersion in Oil No.1 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) Hardness Change -3 to +5 Volume Change 0 to +7% Test Method: 0.5 g min weight, multiple specimens allowed. Visual Evaluat
17、ion No surface tackiness or cracks when folded flat against itself. 3.10.4 Immersion in Oil No.3 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) Hardness Change -5 to +1 Volume Change +2 to +9% Test Method: 0.5 g min weight, multiple specimens allowed. Visual Evaluation No surface tackiness or cracks wh
18、en folded flat against itself. 3.10.5 Immersion in Approved Engine Oil of Affected Model Year (ISO 1817/ASTM D 471, 1,000 h at 150 +/- 2 C, see para 5.1) Hardness Change +/- 4 Volume Change +1 to +7% Test Method: 0.5 g min weight, multiple specimens allowed. Visual Evaluation No surface tackiness or
19、 cracks when folded flat against itself. 3.10.6 Density 1.98 - 2.04 g/cm3(ISO 1183, Method A/ASTM D 297) 3.10.7 Tensile Permanent Set, max 30% (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 d
20、3 = inside diameter, after test ENGINEERING MATERIAL SPECIFICATIONWSK-M2D427-A2Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 5 of 5 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this
21、 specification. 5.1 For information on currently approved service fluids 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
