1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 09 21 N-STATUS No Replacement Named, No known use C. Mracna, NA 2004 10 15 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.9 & 4 1995 02 15 Released NE01E10127076156 E. Duda Printed copies are uncontrolled Copyright 2009, Ford Global Techn
2、ologies, LLC Page 1 of 3 POLYACRYLIC (ACM) RUBBER O-RING WSS-M2D475-A3 NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a polyacrylic rubber compound for use where resistance to high heat, engine oil or Automatic Transmission Fluid is required. 2. APPLICATION This
3、 specification was released originally for material used as a standard part O ring. 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). 3.4 SLAB STOCK 3.
4、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 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 1.3
5、0 - 1.34 g/cm3(ISO 1183, Method A/ASTM D 297) 3.4.3 Hardness, International 65 - 75 (ISO 48/ASTM D 1415) 3.4.4 Hardness, Durometer 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 9.5 MPa (ISO 37/ASTM D 412, Die C)
6、3.4.6 Elongation at Break, min 180% (Test Method according to para 3.4.5) 3.4.7 Modulus at 50% Elongation 1.0 to 3.0 MPa (Test Method according to para 3.4.5) ENGINEERING MATERIAL SPECIFICATIONWSS-M2D475-A3 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 3 3.4
7、.8 Low Temperature Flexibility, min -12 C (ASTM D 1329) TR 10 min 3.4.9 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.4.10 Compression Set, max 28% (ISO 815/ASTM D 395, Method B, except 25% compression, 22 h at 150 +/- 2 C) 3.5 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h
8、, 1000 h at 150 +/- 2 C) 3.5.1 Hardness Change, max +15 3.5.2 Tensile Strength Change, max -30% 3.5.3 Elongation Change, max -60% 3.5.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.6 IMMERSION IN OIL IRM 901 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) 3.6.1 Har
9、dness Change -5 to +10 3.6.2 Tensile Strength Change, max -10% 3.6.3 Elongation Change, max -45% 3.6.4 Volume Change -5 to +5% 3.6.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.7 IMMERSION IN OIL IRM 903 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) 3.7.1 Hardne
10、ss Change -20 to 0 3.7.2 Tensile Strength Change, max -12% 3.7.3 Elongation Change, max -40% 3.7.4 Volume Change 0 to +20% ENGINEERING MATERIAL SPECIFICATIONWSS-M2D475-A3 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 3 3.7.5 Visual Evaluation No surface tack
11、iness or cracks when folded flat against itself. NOTE: IRM 901 and IRM 903 oils are replacing ASTM No.1 and ASTM No.3 oils, respectively. 3.8 IMMERSION IN APPROVED TRANSMISSION FLUID OF AFFECTED MODEL YEAR (ISO 1817/ASTM D 471, 1000 h at 150 +/- 2 C, see para 5.1) 3.8.1 Hardness Change 0 to +14 3.8.
12、2 Tensile Strength Change, max -20% 3.8.3 Elongation Change, max -50% 3.8.4 Volume Change -5 to +10% 3.8.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 RECYCLING CODE ACM
