1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 02 2017 05 12 Reactivated See revision paragraph A. Reaume NA 2017 01 04 Inactive No replacement S. Short, NA 2014 12 08 Released A. Reaume, NA Controlled document at www.MATS Copyright 2017, Ford Global Technologies, LLC Page 1 of 4 SEA
2、LANT, SILICONE RUBBER, OXIME CURED, WSS-M4G323-A13 HIGH VISCOSITY, BLACK 1. SCOPE The material defined by this 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 material
3、s are ready for use as received, requiring no catalyst or heat cure. 2. APPLICATION This specification was released 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 encou
4、ntered. The material is a high viscosity, medium modulus, oxime cured material with excellent blowout resistance 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/wate
5、r and must not be used for these applications. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.1 APPROVED SOURCES This specification requires the use of approved sources. Only the sources identified on the Ford Approved Source List (ASL) c
6、an be used when this specification is listed on the drawing, CAD file, or other documents. The list of approved sources is located within Ford at or available externally through a Ford Materials Engineer. 3.2 SPECIFIC GRAVITY 1.25 - 1.37 (ASTM D792, Method A) 3.3 EXTRUSION RATE 40 60 grams/minute(S
7、emco Press Flow, 620 kPa, 23 C) 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 time: Gap, 0.75 mm 150 seconds, min Gap, 1.00 mm 70 seconds, min 30 minutes cure time: Gap, 1.00 mm 200 seconds, min N
8、ote: Take 1 minute to assemble and test 30 minutes after assembly. ENGINEERING MATERIAL SPECIFICATION WSS-M4G323-A13 Copyright 2017, Ford Global Technologies, LLC Page 2 of 4 3.5 CURE RATE RANGE (Assembly Time) 7 20 min (FLTM BV 125-01, max time at which both surfaces have a continuous strip of seal
9、ant at 23 C and 50% R.H. 3.6 TOTAL 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
10、Strength 1.7 MPa min (ASTM D412, Die C) 3.7.2 Elongation 290 % min 3.7.3 Modulus at 100 % 0.5 MPa min 3.7.4 Durometer Hardness (ASTM D2240, Shore A, instantaneous) 31 - 46 3.8 OIL IMMERSION (ASTM D471, 168h at 150+/-2 C, ASTM SF105 Oil, after cure per paragraph 3.7) 3.8.1 Tensile Strength Change -10
11、% max (ASTM D412, Die C) 3.8.2 Elongation Change -40% max 3.8.3 Volume Change -20% max 3.8.4 Hardness Change +40 max (ASTM D2240, Shore A, instantaneous) 3.9 HIGH TEMPERATURE RESISTANCE (ASTM D573, 168h at 175+/-2 C, after cure per paragraph 3.7) 3.9.1 Tensile Strength Change +40 to -10 % (ASTM D412
12、, Die C) 3.9.2 Elongation Change -60 % max 3.9.3 Hardness Change (ASTM D2240, 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 1010 Steel Adhesion 0.8 MPa min Joint Movement 4.0 mm min 2024 Alclad Aluminum to Al
13、uminum 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: Dip panels in a solution of 5 % IRM 902 oil in toluene; let flash for 15 minutes, prio
14、r 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) When stored in sealed unopened containers out of direct sunlight at ambient temperatures between 10 C and 27 C. The supplier mus
15、t label each container to indicate expiration date of the material and production usage beyond expiration date 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 r
16、emoved and does not affect the remaining contents. ENGINEERING MATERIAL SPECIFICATION WSS-M4G323-A13 Copyright 2017, Ford Global Technologies, LLC Page 4 of 4 3.12 QUALITY The material shall be of uniform quality, free from foreign materials and properties detrimental to normal production use. 3.13
17、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 2017 05 12 3.2 Specific Gravity was 1.25 1.32, 3.3 Extrusion Rate was 1400-2400 s 3.4 Blow Out Resistance was pass fail.
