1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 04 05 Revised Corrected test methods in para 4.5.4 and 4.5.5 T. Covert 2004 10 20 Revised Inserted 4.0; Deleted 4.1, 4.2, 4.3, 4.12, 4.13 Corrected numbering 4.11 1996 06 13 Activated T. Covert Printed copies are uncontrolled Copyright 20
2、06, Ford Global Technologies, LLC Page 1 of 4 TUBING, SILICONE (VMQ), HIGH TEMPERATURE, HOT WSS-M2D486-A AIR RESISTANT 1. SCOPE The material defined by this specification is a long life, high temperature oil resistant, ozone resistant, moderate to low pressure silicone rubber hose with ability to se
3、rvice low temperature down to -40 C. 2. APPLICATION This specification was released originally for material used in connectors for the engine charge air and or Turbo Charged connections. The tubing is not recommended for engine coolant or engine oil. 3. CONSTRUCTION The hose shall consist of silicon
4、e rubber coated on woven aramid (Nomex) cloth. 4. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 4.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Pr
5、oduction Materials (WSS-M99P1111-A). 4.4 MATERIAL TESTING 4.4.1 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 molde
6、d parts are recommended. The test sheets shall have the following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm 4.5 ORIGINAL PROPERTIES 4.5.1 Density 1.11 - 1.35 g/cm3(ISO 1183, Method A/ASTM D 297) 4.5.2 Hardness, Durometer A 45 +/- 5 (ISO 868/ASTM D 2240) 4.5.3 Tensile Strength, min 6 MPa (ISO 37
7、/ASTM D 412, Die C) ENGINEERING MATERIAL SPECIFICATIONWSS-M2D486-APrinted copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 4 4.5.4 Elongation at Break, min 200% (ISO 37/ASTM D 412, Die C) 4.5.5 Modulus at 100% Elongation 0.86 MPa (ISO 37/ASTM D 412, Die C) 4.5.6 Tear S
8、trength, min 9 kN/m (ISO 34, Method B, procedure (a)/ ASTM D 624, Die B) 4.5.7 Brittleness Point, max pass (ISO 812, Type B specimen/ASTM D 2137, Method A) 9.3.2, non-brittle after 3 min at -55 C 4.5.8 Ozone Resistance ESB-M9P1-A (FLTM BP 101-01, Procedure A) “0“ Ratting 4.5.9 Compression Set, max 5
9、0% (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up specimens, 22 h at 175 +/- 2 C) 4.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 175 +/- 2 C) 4.6.1 Hardness Change +10 4.6.2 Tensile Strength Change, max +30% 4.6.3 Elongation Change, max -40% 4.6.4 Visual Evalu
10、ation No surface tackiness or cracks when folded flat against itself. 4.7 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 175 +/- 2 C) 4.7.1 Hardness Change +20 4.7.2 Tensile Strength Change, max -40% 4.7.3 Elongation Change, max -50% 4.7.4 Visual Evaluation No surface tackiness o
11、r cracks when folded flat against itself. ENGINEERING MATERIAL SPECIFICATIONWSS-M2D486-APrinted copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 4 4.8 IMMERSION IN OIL IRM 901 (ISO 1817/ASTM D 471, 168 h at 23 +/- 2 C) 4.8.1 Hardness Change 0 to -10 4.8.2 Tensile Stren
12、gth Change, max -20% 4.8.3 Elongation Change, max -20% 4.8.4 Volume Change 0 to +15% 4.8.5 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 4.9 IMMERSION IN M7C36-A FLUID (ISO 1817/ASTM D 471, 168 h at 21 +/- 2 C, see para 5.1) 4.9.1 Elongation Change, max -25% 4.10
13、SILICONE VOLATILES, max .65% (FLTM AV 102-01, as received at Ford Motor Company) NOTE: For engine applications the percent of silicone shall not be greater than 0.65%. A silicone percentage greater than 0.65 may cause the emissions oxygen sensor to operate inaccurately. 4.11 FINISHED PART REQUIREMEN
14、TS 4.11.1 Burst Strength I.D. Minimum Burst Range Strength 0 up to 75 1.00 MPa 75 up to 100 0.69 MPa 100 up to 125 0.62 MPa 4.11.2 Heat Aged - Dry air Oven (70 h at 225 C +/- 3 C) 4.11.2.1 Burst Strength Change -20% Max 4.11.3 Heat Aged - Dry air Oven (70 h at 225 C +/- 3 C) 4.11.3.1 Weight change a
15、fter 48 hours -7.5% Max at 225 C ENGINEERING MATERIAL SPECIFICATIONWSS-M2D486-APrinted copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 4 4.11.4 Immersion in M7C36-A, Oil (ASTM D 471, 168 h at 21 C +/- 2 C) 4.11.4.1 Burst Strength Change -20% Max 4.11.5 Adhesion 1.0 kN
16、/m Min (ASTM D 413, Strip Specimen Type A) 6. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 6.1 For information on currently approved service fluids and other materials required for use in this specific
17、ation contact: Materials Laboratory 15/GM-D01-D AVT Materials, Fastener, Corrosion& Protection Research and Engineering Centre VC5 Ford Motor Company Ltd Ford Motor Company Laindon, Basildon DTC, Suite 4500 Essex SS15 6EE, England Allen Park, MI 48101, USA Materials Engineering Product Engineering Office Ford Motor Company of Australia Ltd Princes Highway, Norlane Victoria 3214, Australia 6.2 RECYCLING CODE VMQ
