1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 0 2018 07 28 Released A. Reaume, NA Controlled document at www.MATS Copyright 2018, Ford Global Technologies, LLC Page 1 of 5 SEALANT, POLYACRYLATE RUBBER, MOISTURE CURED, WSS-M4G327-A1 HIGH VISCOSITY 1. SCOPE The material defined by thi
2、s specification is a one component thixotropic spreadable polyacrylate rubber based sealant/adhesive. 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. This material has a lower permeation
3、rate and a longer open time versus silicone based sealants. Unlike silicone, this material will not leach siloxanes into engine oil, resulting in foaming and sensor contamination issues. 2. APPLICATION This specification was released originally for materials used for form-in-place gaskets such as on
4、 engine oil pans, front covers, cylinder blocks and engine ladder frames, electrified powertrain, also transmission and axle housings where operating temperatures up to 150C may be encountered. The material is a high viscosity, medium modulus, moisture cured material with excellent blowout resistanc
5、e and long assembly time, excellent oil resistance, excellent adhesion and good joint movement on stamped coated steel, cast iron, aluminum and composites. This RTV will have lower permeability than silicone based RTVs. This material should not be used for water/glycol applications. 3. REQUIREMENTS
6、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) can be used when this specification is listed on the drawing, CA
7、D 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 1.30-1.37 (ASTM D 792, Method A) 3.3 EXTRUSION RATE Test method: Use a Semco 440 (or 4” by 0.125” equivalent) nozzle at 0.63 MPa pressur
8、e. Test to be done at 25 C +/- 2 C and 50% RH +/-5%. Weight material dispensed for 15 seconds. Multiply the weight by 4. bulk packs 300 ml containers 25-65 g/min 10-65 g/min ENGINEERING MATERIAL SPECIFICATION WSS-M4G327-A1 Copyright 2018 Ford Motor Company Page 2 of 5 3.4 BLOW OUT RESISTANCE 60 s mi
9、n (ASTM F 2523, Method A, 14 kPa pressure, cured for 1 minute at 23 C +/- 2 C and 50% RH +/-5%, 0.50 mm gap) 3.5 SKIN OVER TIME (Assembly Open Time) 60 minutes max (FLTM BV 127-02 or FLTM BV 125-01 at 25C +/- 2C and 50% RH +/-5%) 3.6 CURED PROPERTIES Properties determined after curing the sealant fo
10、r 168 h +/- 2 h at 23 C +/- 2 C and 50% RH +/-5% on a 2.0 mm cross-section. Original Tensile Strength 1.0 MPa min (ASTM D 412, Die C) Elongation 150 % min Modulus 0.5 MPa min Durometer Hardness 25-35 (ISO 868, Shore A, Instantaneous) 3.7 OIL IMMERSION (ASTM D 471, 168 h at 150 C +/- 2 C, ASTM SF 105
11、 Oil or its equivalent replacement after cure as per paragraph 3.6) Tensile Strength Change 0 to +10 % (ASTM D 412, Die C) Elongation Change -60 % max Volume Change -20 max Hardness Change +40 max (ASTM D 2240, Shore A, instantaneous) 3.8 LAP SHEAR ADHESION & JOINT MOVEMENT (SAE J1523, material thic
12、kness 1mm. Cure sealant for 168h at 23 C +/- 2 C and 50% RH +/-5%. Joint movement is defined as extension (mm) when at maximum load, minus any slack in the test fixture. 3.8.1 Clean lap shears, no oil aging 2024 Alclad aluminum to Alclad aluminum Adhesion (Shear Strength) 1.0 MPa min Joint movement
13、1.5 mm min 3.8.2 Clean lap shears, oil aged (Age for 168h at 150 C +/- 2 C in ASTM SF 105 oil or its equivalent replacement, after cure as per paragraph 3.6) 2024 Alclad aluminum to Alclad aluminum ENGINEERING MATERIAL SPECIFICATION WSS-M4G327-A1 Copyright 2018 Ford Motor Company Page 3 of 5 Adhesio
14、n (Shear Strength) 1.0 MPa min Joint movement 0.5 mm min 3.9 PERMEABILITY (Test procedure: FLTM: BZ105-05) Fuel: CE10, 18 and 40 C Report only 3.10 STORAGE STABILITY (From date of manufacture) Bulk packs. (200 liter, 55 gallon, 20 liter, 5 gallon) 9 months, min 300 ml foil pack / aluminum tubes 9 mo
15、nths min 300 ml plastic cartridge 6 months, min (From date of receipt at Ford Motor Company) Bulk packs. (200 liter, 55 gallon, 20 liter, 5 gallon) 6 months, min 300 ml foil pack / aluminum tubes 6 months min 300 ml plastic cartridge 3 months, min When stored in sealed unopened containers out of dir
16、ect sunlight at ambient temperatures between 8 C and 28 C. The supplier must label each container to indicate the expiration date of the material and production usage beyond the expiration date is not permitted. Containers should always be kept sealed when not in use. After opening, a plug of cured
17、material may form across the container opening. This can be easily removed and does not affect the remaining contents. 3.11 QUALITY The material shall be of uniform quality, free from foreign materials and properties detrimental to normal production use. 3.12 NON-INTERCHANGEABILITY OF MATERIALS Only
18、 approved materials all from the same production source shall be in 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 M
19、aterial Specifications. 4.1 APPROVAL OF MATERIALS Suppliers desiring approval of their materials shall first obtain an expression of interest from Purchasing, Design or Product Development, and Materials Engineering. The supplier shall submit a completed copy of their laboratory test reports, signed
20、 by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of the Material Specification. Tested material samples must be available for review upon request and kept for a minimum of one year. Upon request, the supplier will review the
21、associated quality control documents (Process Failure Mode and Effects Analysis, Control Plans, Certification testing) with Ford. ENGINEERING MATERIAL SPECIFICATION WSS-M4G327-A1 Copyright 2018 Ford Motor Company Page 4 of 5 4.2 SUPPLIERS ONGOING RESPONSIBILITY All materials must be equivalent in al
22、l characteristics to the material upon which approval was originally granted. Prior to making any changes to the material originally approved, whether or not such changes affect the materials ability to meet the specification requirements, the supplier shall notify the affected Supplier Technical As
23、sistance (STA), Purchasing, and Materials Engineering activities of the proposed changes (with reasons) by submission of a completed Suppliers Request for Engineering Approval, SREA. For parts and components using Ford Engineering Material Specifications, all samples tested to the specifications for
24、 Design Verification (DV), Production Verification (PV) and Production Part Approval Process (PPAP) sign off must be kept until Job 1. 4.3 RESTRICTED SUBSTANCE MANAGEMENT STANDARD Substance restrictions imposed by regulations or Company direction applies to the materials addressed by this document.
25、The restrictions are identified in the Restricted Substance Management Standard WSS-M99P9999-A1 which is updated yearly. It is the suppliers responsibility to comply with this standard on a continuing basis through IMDS and or GMAP reporting. 5. SUMMARY OF REVISIONS ENGINEERING MATERIAL SPECIFICATIO
26、N WSS-M4G327-A1 Copyright 2018 Ford Motor Company Page 5 of 5 Initial Approval and/or Initial Approval in a New Region and New Manufacturing Location Approval for Recycled Materials Additional Manufacturing Location for Previously Approved Material Para. Test Minimum Lots Specimens per Lot Total Tes
27、t Specimens Lots Specimens per lot Total Test Specimens 3.2 Specific Gravity 3 3 9 1 3 3 3.3 Extrusion Rate 3 3 9 1 3 3 3.4 Blow Out Resistance 3 3 9 1 3 3 3.5 Skin Over Time 3 3 9 1 3 3 3.6 Cured Properties 3 3 9 1 3 3 3.7 Oil Immersion 1 3 3 1 3 3 3.8 Lap Shear Adhesion & Joint Movement 1 3 3 1 3 3 3.9 Permeability 1 2 2 3.10 Storage Stability 3 1 3 1 1 3
