1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1988 10 31 NE01E10000474028 Add Total Si Volatiles E. J. Duda1978 11 08 Metricated, Retyped, with deletion of types1972 10 30 Released (Was XE-M4G2) CE3B-WP9466553WP 3948-a Page 1 of 4 SEALANT, SILICONE RUBBER -
2、HEAT RESISTANT ESE-M4G195-A1. SCOPEThe material defined by this specification is a one component thixotropicspreadable silicone rubber based adhesive/sealant. It is capable of beingpumped, metered and distributed into a gasket profile. It curesprogressively inward from the surface at room temperatur
3、e absorbing watervapor in the air as the curing activator. An acetic acid odor is liberatedas vulcanization occurs. After vulcanization is complete, the tough rubberysolid is odorless.2. APPLICATIONThis specification was released originally for material having general usessuch as bonding of various
4、surfaces together; sealing crevices, irregularjoints and other cavities; electrical insulation; and formed-in-placegaskets. It adheres to a variety of substrates including metal, glass,ceramics, wood, cork, leather, fabric, painted surfaces, rubber compoundsexcept those which exude plasticizers, and
5、 most plastic materials exceptpolyethylene, teflon and some grades of acrylic and polycarbonate. Toobtain good bonds, the surface should be properly solvent cleaned to removedirt and grease, and some difficult surfaces may require a primer. Engineapplications are main bearing cap and intake manifold
6、 corner joints,bonding of and filling joints of gaskets, or formed-in-place oil pan androcker arm cover gaskets, or other applications where high operatingtemperatures of 204-260 C may be encountered.3. REQUIREMENTS3.1 the curing system covered by this specification is the acetic acid(acetoxy) cure
7、system which was previously identified as Type I.3.2 COLOR, unless otherwise specified on the Blackengineering drawing.3.3 SPECIFIC GRAVITY 1.00 - 1.14(ASTM D 792, Method “A“)3.4 VISCOSITY 20 - 40 s(FLTM BV 3-1 at 40 psi (280 kPa) line pressureand 0.104 in (2.6 mm) dia. orifice)Alternate Procedure:
8、300 - 600 g/min(Extrusion rate at 90 psi (620 kPa) airpressure and 0.125 in (3.2 mm) dia. orifice)NOT TO BE USED FOR NEW DESIGN2014 N Status No replacement named L. Sinclair, NAENGINEERING MATERIAL SPECIFICATIONESE-M4G195-AWP 3948-b Page 2 of 4 3.5 FLOW CHARACTERISTICSThe material is thixotropic and
9、 should not flow, slump or sag underits own weight even when applied to vertical or overhead surfaces.Flow characteristics shall be controlled as follows:Horizontal bead - vertical plate, max 1/16 in (1.6 mm)Vertical bead - vertical plate NoneLateral - bead and plate horizontal None3.6 CURE RATEA 1/
10、4 in (6 mm) diameter bead shall be tack free in 1 h max andcompletely cured in 48 h max at 23 +/- 2 C and 50 +/- 5% R.H.Upon exposure to water vapor in the air, the material begins to cureimmediately on the surface and progresses inward. A tack free skinwill form in 10 - 30 minutes. It may be tooled
11、 into position by aspatula or blade for up to approximately 10 minutes before formationof cured skin becomes too advanced. Cure time is affected by relativehumi dity, degree of confinement, and cross sectional thickness.Generally a 1/4 in (6 m m) bead will cure within 24 h at 23 C and 50%R.H., optim
12、um cure occu rs at 32 C and 90% R.H. in a shorter time andles s moisture extends curing time. The time for proper cure isgenerally lengthened by increased confinement. Metal to metal bondsshould not overlap more than 1 in (25 mm), otherwise cure may not becompleted and the material may soften at ele
13、vated temperatures.3.7 LOW TEMPERATURE FLEXIBILITY No crackingTest Method: Apply a 1/8 in (3 mm) diameter x 6 in (150 mm) long beadof material to a strip of aluminum foil. Cure for 24 h at 23 +/- 2 Cand 50 +/- 5% R.H. Expose to a temperature of - 40 C for 4 h and bendaround a temperature conditioned
14、 1/8 in (3.2 mm) mandrel.3.8 HIGH TEMPERATURE RESISTANCE Soft, flexible andtightly adheringTest Method: Apply a 1/4 in (6 mm) diameter bead of material to astrip of a luminum foil. Cure for 24 h at 23 +/- 2 C and 50 +/- 5%R.H. Heat in an air ci rculating oven and hold for 24 h at 204 +/- 6C. Cool to
15、 room temperature and examine.3.8 FLUID IMMERSION RESISTANCE, weight changeASTM Oil #3 0 to + 35%Engine Coolant -5 to + 10%Test method: Apply mate rial 20 mils, (0.51 mm) thick approximately 2in (50 mm) long to weighed clean 1 X 4 in (25 X 100 mm) aluminum orstainless steel panels. Cure for 24 h at
16、room t emperature conditions(23 +/- 2 C and 30-70% R.H.). Weigh to determine weight of materialapplied. Hang two dupl icate specimens back to back from a stainlesssteel wire and suspend in each of the two following fluids andcontainers:ENGINEERING MATERIAL SPECIFICATIONESE-M4G195-AWP 3948-b Page 3 o
17、f 4 Add 150 mL of ASTM oil #3 to a test tube and assemble a tightlyfitted stopper and air cooled reflex condenser tube (see ASTM D 471Immersion Test for Elas tomers - Section 6B for apparatus descriptionand size). Insert test tube into an aluminum heating block and heatfor 70 h at 121 +/- 1 C.Add 80
18、0 mL of 50/50 mixture of Initial Fill Engine CoolantConcentrate and tap wat er to a 1000 mL 45/50 taper ground glass neckErlenmeyer extraction flask. Attach a water cooled condenser (seeFLTM BP 8-5 for apparat us description). Heat on a hot plate for 70 hat gentle reflux boiling.Remove container fro
19、m source of heat and cool to room temperature.Remove specimens and blot or rinse dry. Weigh an d determine change inweight.3.10 TOTAL SILICONE VOLATILE, max 2.5 %(FLTM AV 102-1, D4 thru D10 + L4 thru L10)3.11 QUALITYShall be a smooth homogeneous mixture, free from foreign materialsand properties det
20、rimental to normal production application. It shallnot con tain particles or solid spots of sufficient size to causeblockage of a 0.020 in (508 um) diameter orifice.3.12 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/ortherma l analysis
21、of material/parts supplied to this specification.The IR spectra and thermograms established for i nitial approval shallconst itute the reference standard and shall be kept on file at thedesignated material laboratory. All samples sha ll produce IR spectraand thermograms that correspond to the refere
22、nce standard when testedunder the same conditions.3.13 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStand ard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatist ical tools must be used to
23、analyze process/product data sothat variation in the final product is continuously reduced.3.14 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.ENGINEERING MATERIAL SPECIFICATIONE
24、SE-M4G195-AWP 3948-b Page 4 of 4 Pri or to making any change in the properties, composition,constr uction, color, processing or labeling of the materialorig inally approved under this specification, whether or not suchchange s affect the materials ability to meet the specificationrequir ements, the
25、Supplier shall notify Purchasing, Toxicology andthe affected Materials Engineering activity of the proposed changesand obtain the written approval of the Materials Engineeringactivity. Test data, t est samples and a new code identification areto be submitted with the request.Substance restrictions i
26、mposed by law, regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engineering Material Specification WS S-M99P9999-A1, unlessa different suffix (e.g., A2 or A3) is specified on the engineeringdocument for the application.4. APPROVAL OF SUPPLIERSMat
27、erials defined by this specification must have prior approval by theresponsible Materials Engineeri ng activity. Suppliers desiring approval ofthe ir materials shall first obtain an expression of interest from theaffec ted Purchasing, Design and Materials Engineering activity. Uponrequest, the Suppl
28、ier shall submit to the affected Materials Engineeringactivity its own laboratory rep ort to the specification (test results, notnominal values), the material designation and code number, and testspecim ens for Ford evaluation. Upon approval, the material will be addedto the Engineering Material App
29、roved Source List.5. GENERAL INFORMATIONThe information given below is provided for clarification and assistancein meeting the requirements of this specification.This material is packaged in collapsible tubes, cartridges, bulk metalcontainers or pails, or drums. Shelf life of the materi al is approx
30、imately6 mos. - 1 year with storage recommended below 32 C, how ever, refrigerationis not required.Contai ners should always be kept sealed when not in use. After opening, aplu g of cured material may form across the container opening duringstorage. This may easily be removed and does not affect the remainingcontents.
