1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 00 2014 12 08 Released A. Reaume, NA Controlled document at www.MATS Copyright 2014, Ford Global Technologies, LLC Page 1 of 4 SEALANT, SILICONE RUBBER, OXIME CURED, WSS-M4G323-A13 HIGH VISCOSITY, BLACK 1. SCOPE The material defined by th
2、is specification is a one component thixotropic spreadable silicone rubber based adhesive/sealant. It is capable of being pumped, metered, and distributed into a gasket profile. These materials are ready for use as received, requiring no catalyst or heat cure. 2. APPLICATION This specification was r
3、eleased originally for materials used for formed-in-place gaskets such as engine oil pan, rocker cover, cylinder block or oil pump, where high operating temperatures (up to 204 C) may be encountered. The material is a high viscosity, medium modulus, oxime cured material with excellent blowout resist
4、ance and long assembly time, good oil resistance and excellent adhesion and joint movement resistance on oiled steel and aluminum panels. This material has very poor resistance to coolant/water and must not be used for these applications. 3. REQUIREMENTS Material specification requirements are to be
5、 used for initial qualification of materials. 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 SPECIFIC GRAVITY 1.25 - 1.32 (ASTM D 792, Method A) 3.3 EXTRUSION R
6、ATE 1400 2400 s Test Method: Time to dispense 50 cc through a stainless steel nozzle with a 3.2 +/- 0.13 mm orifice and 50 +/-0.13 mm in length at 620 kPa pressure using a #250 Semco gun and 170 g PE cartridge assembly. Start the test by dispensing 10 g and then timing the next 50 cc. To convert fro
7、m g to cc, multiple by specific gravity. ENGINEERING MATERIAL SPECIFICATION WSS-M4G323-A13 Copyright 2014, Ford Global Technologies, LLC Page 2 of 4 3.4 BLOW OUT RESISTANCE (FLTM BV 126-01, 14 kPa pressure, 30 minutes cure at 23 C at 50% R.H., 0.75 mm and 1.0 mm gap, 4.0 mm flange) One minute cure t
8、ime: Gap, 0.75 mm Pass Gap, 1.00 mm Fail 30 minutes cure time: Gap, 1.00 mm Pass Note: Take 60s to assemble and test 30 minutes after assembly. 3.5 CURE RATE RANGE (Assembly Time) 7 24 min (FLTM BV 125-01, max time at which both surfaces have a continuous strip of sealant at 23 C and 50% R.H. 3.6 TO
9、TAL SILICONE VOLATILES 0.6 max (FLTM AV 102-01, cured 24 h at 23 +/-2 C and 50 +/-5% R.H.) 3.7 CURED PROPERTIES (Properties determined after curing the sealant for 16 +/-2 h at 23+/-2 C and 50+/-5% relative humidity with a 2.0 mm cross section.) 3.7.1 Original Tensile Strength 1.7 MPa min (ASTM D 41
10、2, Die C) 3.7.2 Elongation 400 % min 3.7.3 Modulus at 100 % 0.5 MPa min 3.7.4 Durometer Hardness (ASTM D 2240, Shore A, instantaneous) 31 - 46 3.8 OIL IMMERSION (ASTM D 471, 168h at 150+/-2 C, ASTM SF105 Oil, after cure per paragraph 3.7) 3.8.1 Tensile Strength Change -10% max (ASTM D 412, Die C) 3.
11、8.2 Elongation Change -40% max 3.8.3 Volume Change -20% max 3.8.4 Hardness Change +40 max (ASTM D 2240, Shore A, instantaneous) 3.9 HIGH TEMPERATURE RESISTANCE (ASTM D 573, 168h at 175+/-2 C, after cure per paragraph 3.7) 3.9.1 Tensile Strength Change +40 to -10 % (ASTM D 412, Die C) ENGINEERING MAT
12、ERIAL SPECIFICATION WSS-M4G323-A13 Copyright 2014, Ford Global Technologies, LLC Page 3 of 4 3.9.2 Elongation Change -60 % max 3.9.3 Hardness Change (ASTM D 2240, Shore A, instantaneous) +22 max 3.10 LAP SHEAR ADHESION let flash for 15 minutes, prior to assembly of lap shear) 2024 Alclad Aluminum to
13、 1010 Steel Adhesion 0.8 MPa min Joint Movement 4.0 mm min 2024 Alclad Aluminum to Aluminum Adhesion 0.8 MPa min Joint Movement 4.5 mm min 3.10.2 Immersion in IRM 902 Oil (168 h at 150+/-2 C) Clean Panels 2024 Alclad Aluminum to Aluminum Adhesion 0.5 MPa min Joint Movement 5.0 mm min Oiled Panels: D
14、ip panels in a solution of 5 % IRM 902 oil in toluene; let flash for 15 minutes, prior to assembly of lap shear) 2024 Alclad Aluminum to Aluminum Adhesion 0.6 MPa min Joint Movement 5.0 mm min 3.11 STORAGE STABILITY 12 months min (From date of manufacture) ENGINEERING MATERIAL SPECIFICATION WSS-M4G3
15、23-A13 Copyright 2014, Ford Global Technologies, LLC Page 4 of 4 When stored in sealed unopened containers out of direct sunlight at ambient temperatures between 10 C and 27 C. The supplier must label each container to indicate expiration date of the material and production usage beyond expiration d
16、ate is not permitted. Containers should always be kept sealed when not in use. After opening, a plug of cured material may form across the container opening during storage. This may easily be removed and does not affect the remaining contents. 3.12 QUALITY The material shall be of uniform quality, f
17、ree from foreign materials and properties detrimental to normal production use. 3.13 NON-INTERCHANGEABILITY OF MATERIALS Only approved materials all from the same production source shall be used in conjunction with one another. 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 5. SUMMARY OF REVISIONS
