1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 06 24 N-STATUS No replacement named C. Mracna,NA 2006 08 25 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.13 & 4 1989 11 21 Released SM/ER 7167 TC B. Hennessey Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC
2、 Page 1 of 3 TUBE, ETHYLENE/PROPYLENE (EPDM) RUBBER, HEAT WSD-M96D24-A RESISTANT NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an ethylene/propylene rubber tube with resistance to moderate heat and excellent resistance to ozone. 2. APPLICATION This specificatio
3、n was released originally for material used as fresh air tubing on the induction side of the engine where there is little or no oil or fuel vapor carried in the air stream. It is capable of continuous operation at temperatures up to 125 C and of withstanding peak temperatures up to 150 C. The materi
4、al remains serviceable at -40 C but has poor resistance to fuels and hot oil. (See General Information). However, the material will withstand incidental exposure to these materials such as is normal in the under-hood environment. If resistance to fuel vapors and/or hot oil at prolonged temperatures
5、not exceeding 130 C is required then WSD-M96D9-A should be considered. 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 TUBE CONSTRUCTION The tube
6、 shall consist of a single extrusion or molding of ethylene/ propylene rubber without internal or external fabric reinforcement. 3.5 MATERIAL TESTING 3.5.1 Preparation of Test Specimens Whenever possible, all test specimens shall be die-cut from the finished parts. When not feasible, specimens cut f
7、rom molded test sheets manufactured from the same material and with equivalent cure to molded parts are recommended. The test sheets shall have the following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm 3.6 ORIGINAL PROPERTIES 3.6.1 Hardness, International 65 - 75 (ASTM D 1415) 3.6.2 Hardness, Dur
8、ometer A 65 - 75 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen. Hand held durometers shall not be used.) ENGINEERING MATERIAL SPECIFICATIONWSD-M96D24-APrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 3 3.6.3 Tensile Strength, min 10.0 MPa (ISO 37/ASTM
9、D 412, Die C) 3.6.4 Elongation at Break, min 250% (Test Method according to 3.6.3) 3.6.5 Modulus at 100% Elongation, min 1.5 to 4.0 MPa (Test Method according to 3.6.3) 3.6.6 Tear Strength, min 30 kN/m (ISO 34, Method B, procedure (a)/ ASTM D 624, Die C) 3.6.7 Compression Set, %, max 50% (ISO 815/AS
10、TM D 395, Method B, except 25% compression, plied-up specimens, 70 h at 125 +/- 2 C) 3.6.8 Ozone Resistance Rating 0 (FLTM BP 101-01) 3.7 HEAT AGED (ISO 188/ASTM D 573, 150 +/- air changes/h, 168 h at 150 +/- 2 C) Hardness, International, Change, max +10 Tensile Strength Change, max -45% Elongation
11、at Break Change, max -50% 3.8 HEAT AGED (ISO 188/ASTM D 573, 150 +/- air changes/h, 1000 h at 125 +/- 2 C) Hardness, International, Change, max +10 Tensile Strength Change, max -45% Elongation at Break Change, max -50% 3.9 BRITTLENESS POINT, max -40 C (ISO 812, Type B specimen/ ASTM D 2137, Method A
12、) 3.9.1 Original 3.9.2 Heat Aged according to para. 3.7 3.9.3 Heat Aged according to para. 3.8 ENGINEERING MATERIAL SPECIFICATIONWSD-M96D24-APrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 3 3.10 VACUUM COLLAPSE RESISTANCE, max 10% Test Method: Take a 300 mm l
13、ength of tube, plug one end and apply a vacuum of 10 kPa for 5 minutes. Measure any collapse of the outside diameter and quantify as a percentage of original outside diameter. 3.11 BURST PRESSURE, min 0.4 MPa (ASTM D 380) 3.12 FLAMMABILITY (ISO 3795/SAE J369) Burn Rate, max 100 mm/minute 5. GENERAL
14、INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 IMMERSION IN OIL No.3 (ISO 1817/ASTM D 471, 168 h at 150 +/- 2 C) Hardness Change, Typically -20 Tensile Strength Change, Typically -75% Elongation at Break Cha
15、nge, Typically -70% Volume Change, Typically +200% 5.2 IMMERSION IN FUEL C (ISO 1817/ASTM D 471, 70 h at 23 +/- 2 C) Hardness Change, Typically -30 Tensile Strength Change, Typically -85% Elongation at Break Change, Typically -85% Volume Change, Typically +200% 5.3 IMMERSION IN FUEL C +15% METHANOL (ISO 1817/ASTM D 471, 70 h at 23 +/- 2 C) Hardness Change, Typically -30 Tensile Strength Change, Typically -80% Elongation at Break Change, Typically -80% Volume Change, Typically +150%
