1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 09 29 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.12, 3.13 & 4 1990 08 01 Released EP00E01031538000 M. SiewertPrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 5 ETHYLENE/ACRYLIC (AEM) RUBBER, ROTA
2、TING SHAFT WSK-M2D444-A OIL SEAL 1. SCOPE The material defined by this specification is an ethylene/acrylic rubber compound. 2. APPLICATION This specification was released originally for material used for rotating shaft oil seals in manual transmissions. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR
3、 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 sheets manufactured fro
4、m 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 1.32 - 1.36 g/cm3(ISO 1183, Method A/ASTM D 297) 3.4.3 Hardness, International 70 - 80 (ISO 48/ASTM D 1415) 3.4.4 Hardness, Duromete
5、r A 70 - 80 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen. Hand held durometers shall not be used) 3.4.5 Tensile Strength, min 8.0 MPa (ISO 37/ASTM D 412, Die C) 3.4.6 Elongation at Break, min 200% (Test Method according to para 3.4.5) 3.4.7 Modulus at 50% Elongation, min 3.0 MPa (Test Meth
6、od according to para 3.4.5) ENGINEERING MATERIAL SPECIFICATIONWSK-M2D444-APrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 5 3.4.8 Tear Strength, min 20 kN/m (ISO 34, Method B, procedure a/ ASTM D 624, Die C) 3.4.9 Brittleness Point, max -25 C (ISO 812, Type B
7、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 50% (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up Type 1 specimens, 22 h at 150 +/- 2 C) 3.5 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168
8、 h at 150 +/- 2 C) 3.5.1 Hardness Change 0 to +5 3.5.2 Tensile Strength Change, max -15% 3.5.3 Elongation Change, max -15% 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, 1000 h at 150 +/- 2 C) 3.6.1
9、 Hardness Change 0 to +15 3.6.2 Tensile Strength Change, max -15% 3.6.3 Elongation Change, max -55% 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 0 to +5 3.7.2 Tensil
10、e Strength Change, max +20% 3.7.3 Elongation Change, max -10% ENGINEERING MATERIAL SPECIFICATIONWSK-M2D444-APrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 5 3.7.4 Volume Change 0 to +5% 3.7.5 Visual Evaluation No surface tackiness or cracks when folded flat a
11、gainst itself. 3.8 IMMERSION IN OIL No.3 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) 3.8.1 Hardness Change -35 to 0 3.8.2 Tensile Strength Change, max -40% 3.8.3 Elongation Change, max -20% 3.8.4 Volume Change +40 to +60% 3.8.5 Visual Evaluation No surface tackiness or cracks when folded flat agains
12、t itself. 3.9 IMMERSION IN APPROVED TRANSMISSION FLUID OF AFFECTED MODEL YEAR (ISO 1817/ASTM D 471, 1000 h at 150 +/- 2 C, see para 5.1) 3.9.1 Hardness Change -20 to 0 3.9.2 Tensile Strength Change, max +15% 3.9.3 Elongation Change, max -40% 3.9.3 Volume Change 0 to +30% 3.9.4 Visual Evaluation No s
13、urface tackiness or cracks when folded flat against itself. 3.10 ASH CONTENT 3 - 4% (ASTM D 297 or TGA) 3.11 FINISHED PARTS 3.11.1 Hardness 70 - 80 (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
14、lip edge and spring groove. For 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 h
15、alf part and be reported. The original and the changed hardness shall be measured on one and the same part. ENGINEERING MATERIAL SPECIFICATIONWSK-M2D444-APrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 4 of 5 3.11.2 Heat Aged (ISO 188/ASTM D 573, 150 +/- 50 air cha
16、nges/h, 168 h at 150 +/- 2 C) Hardness Change 0 to +10 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.11.3 Immersion in Oil No.1 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) Hardness Change 0 to +10 Volume Change 0 to +10% Test Method: 0.5 g minimum weight, multip
17、le specimens allowed. Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.11.4 Immersion in Oil No.3 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) Hardness Change -40 to 0 Volume Change +40 to +60% Test Method: 0.5 g minimum weight, multiple specimens allowed. Visual Ev
18、aluation No surface tackiness or cracks when folded flat against itself. 3.11.5 Immersion in Approved Transmission Fluid of Affected Model Year (ISO 1817/ASTM D 471, 1000 h at 150 +/- 2 C, see para 5.1) Hardness Change -30 to 0 Volume Change 0 to +35% Test Method: 0.5 g minimum weight, multiple spec
19、imens allowed. Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.11.6 Density 1.32 - 1.36 g/cm3(ISO 1183, Method A/ASTM D 297) 3.11.7 Ash Content 3 - 4% (ASTM D 297 or TGA) ENGINEERING MATERIAL SPECIFICATIONWSK-M2D444-APrinted copies are uncontrolled Copyright 2004,
20、 Ford Global Technologies, LLC Page 5 of 5 3.11.8 Tensile Permanent Set, max 30% (FLTM BP 116-01, 50% elongation, 22 +/- 2 h at 100 +/- 2 C) % Set = d3-d1 / d2-d1 x 100 d1 = inside diameter, original d2 = inside diameter, elongated state d3 = inside diameter, after test 5. GENERAL INFORMATION The in
21、formation below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 For information on currently approved service fluids and other materials required for use in this specification contact: Materials Laboratory 15/GM-D01-D Transmission & Axle Engineerin
22、g 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
