1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 09 17 N-STATUS Use industry standard C. Mracna, NA 2004 10 14 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.11, 3.12 & 4 1990 05 14 Released C10074476 B Hennessey Printed copies are uncontrolled Copyright 2009, Ford Global Technologies,
2、LLC Page 1 of 3 RUBBER, THERMOPLASTIC POLYURETHANE (PUR) OIL WSD-M2D421-A RESISTANT, HYDROLYSIS RESISTANT, 80 IRHD HARDNESS NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic polyurethane rubber with a hardness of 80 IRHD. 2. APPLICATION This specifi
3、cation was released originally for material used as a clamp/seal on manual gearbox driveshafts. The material has good resistance to hydrolysis and moderate resistance to oils up to 80 C. The oil resistance is poor at temperatures above 100 C. The material will also withstand long-term operation in a
4、ir at temperatures up to 80 C and peak temperatures up to 100 C while remaining flexible down to -40 C. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A
5、). 3.4 MATERIAL TESTING 3.4.1 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
6、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 75 to 85 (ISO 48/ASTM D 1415) 3.5.2 Hardness, Durometer A 75 to 85 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen. Hand held durometers shall not be used) 3.5.
7、3 Tensile Strength, min 30 MPa (ISO 37/ASTM D 412, Die C) 3.5.4 Elongation at Break, min 500% (Test Method according to para 3.5.3) ENGINEERING MATERIAL SPECIFICATIONWSD-M2D421-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 3 3.5.5 Modulus at 100% Elongatio
8、n, 4.0 to 5.5 MPa (Test Method according to para 3.5.3) 3.5.6 Tear Strength, min 35 kN/m (ISO 34, Method B, Procedure A/ ASTM D 624, Die C) 3.5.7 Brittleness Point, max -40 C (ISO 812, Type B specimen/ASTM D 2137, Method A) 3.5.8 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.5.9 Com
9、pression Set, max 60% (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up specimens, 24 h at 100 +/- 2 C) 3.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 100 +/- 2 C) 3.6.1 Hardness Change, max +10 3.6.2 Tensile Strength Change, max -10% 3.6.3 Elongation Change, max
10、 -30% 3.6.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.7 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1,000 h at 80 +/- 2 C) 3.7.1 Hardness Change, max +10 3.7.2 Tensile Strength Change, max -10% 3.7.3 Elongation Change, max -30% 3.7.4 Visual Eval
11、uation No surface tackiness or cracks when folded flat against itself. 3.8 IMMERSION IN OIL No. 1 (ISO 1817/ASTM D 471, 168 h at 100 +/- 2 C) 3.8.1 Hardness Change, max +10 3.8.2 Tensile Strength Change, max -20% ENGINEERING MATERIAL SPECIFICATIONWSD-M2D421-A Printed copies are uncontrolled Copyrigh
12、t 2009, Ford Global Technologies, LLC Page 3 of 3 3.8.3 Elongation Change, max -30% 3.8.4 Volume Change, max -15 to +5% 3.8.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.9 IMMERSION IN OIL No. 3 (ISO 1817/ASTM D 471, 168 h at 100 +/- 2 C) 3.9.1 Hardness Change
13、, max -5 3.9.2 Tensile Strength Change, max -20% 3.9.3 Elongation Change, max -30% 3.9.4 Volume Change, max -15 to +5% 3.9.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.10 IMMERSION IN WATER (ISO 1817/ASTM D 471, 500 h at 80 +/- 2 C) 3.10.1 Hardness Change, max -10 to +10 3.10.2 Tensile Strength Change, max -40% 3.10.3 Elongation Change, max -10% 3.10.4 Volume Change, max -5 to +5% 3.10.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself.
