1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Ver. 3 2008 08 21 Revised Updated and revised para 3.7 G. Kowalski 1995 08 14 Revised Updated and revised para 3.5 & 3.8 B. Gordon 1993 06 30 Released NGA1E10269419005 B. Gordon Printed copies are uncontrolled Copyright 2008, Ford Global Tech
2、nologies, LLC Page 1 of 2 SEALANT, SILICONE RUBBER, ULTRAVIOLET AND MOISTURE CURED WSF-M4G351-A 1. SCOPE The material defined by this specification is a one component, self leveling silicone rubber sealant which will cure by exposure to ultraviolet radiation and moisture. 2. APPLICATION This specifi
3、cation was released originally as a connector pin sealant. 3. REQUIREMENTS 3.1 QUALITY SYSTEM REQUIREMENTS Material suppliers and part producers must conform to Quality System Requirements, QS-9000. Material specification requirements are to be used for initial qualification of materials. A Control
4、Plan for ongoing production verification is required. This plan must be reviewed and approved by the relevant Ford Materials activity and/or Ford Supplier Technical Assistance (STA) prior to production parts submission. Appropriate statistical tools must be used to analyze process/product data and a
5、ssure consistent processing of the materials. Part producers using this material in their products, must use Ford approved materials and must conform to a process control plan which has been approved by STA and/or the relevant Materials Activity. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSI
6、S Ford Motor Company, at its option, may conduct infrared and/or thermal analysis of material/parts supplied to this specification. The IR spectra and thermograms established for initial approval shall constitute the reference standard and shall be kept on file at the designated material laboratory.
7、 All samples shall produce IR spectra and thermograms that correspond to the reference standard when tested under the same conditions. 3.3 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5% relati
8、ve humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. 3.4 COLOR Translucent 3.5 DENSITY, range 0.98 - 1.03 g/cm3 (ISO 1183, Method A/ASTM D 1475) 3.6 VISCOSITY, range 4000 - 7000 mPa.s (ASTM D 1084, Method B, Model RVT, Spindle 3, 10 rpm
9、) ENGINEERING MATERIAL SPECIFICATION WSF-M4G351-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 4 3.7 CURE RATE (ASTM C 679) A 1 gram sample on a clean glass plate shall be tack free in a maximum of 12 to 20 minutes and completely cured in a maximum of 24 ho
10、urs, at 23 +/- 2 C and 50 +/- 5 % relative humidity. A 1 gram sample on a clean glass plate shall be tack free after a 5 to 20 second exposure of ultraviolet radiation (200 to 400 nm spectrum with a primary wavelength of 365 nm) at an intensity of 75 mW/cm2, and completely cured after 24 h at 23 +/-
11、 2 C and 50 +/- 5 % relative humidity. 3.8 MECHANICAL PROPERTIES 3.8.1 Sample Preparation A cured sheet of silicone sealant shall be prepared by placing 37 +/- 0.5 grams of uncured silicone sealant in a ASTM flat sheet mold (152.4 x 152.4 x 3.18 mm) with a polyethylene lined glass sheet on either si
12、de. The assembly shall be clamped together with 4 number 1 spring clamps. Allow the assembly to rest for 10 minutes so that excess material can escape from the mold. The sample shall then be exposed to 75 mW/cm of ultraviolet radiation (200 to 400 nm spectrum with a primary wavelength of 365 nm) for
13、 60 seconds on each side. The silicone sheet shall then be removed from the mold and conditioned at 23 +/- 2 C and 50 +/- 5 % relative humidity for 72 h. 3.8.2 Tensile Strength, min (ISO 37/ASTM D 412, Die C) . As cured 500 kPa . After 24 h at 260 +/- 3 C 550 kPa 3.8.3 Elongation, min (ISO 37/ASTM D
14、 412, Die C) . As cured 75 % . After 24 h at 260 +/- 3 C 10 % 3.8.4 Hardness, Durometer A, range (ISO 868/ASTM D 2240) . As cured 28 - 38 . After 24 h at 260 +/- 3 C 36 - 42 3.9 TOTAL SILICONE VOLATILE, max 0.5 % (FLTM AV 102-01, report D4 through D 10 and L4 through L10) 3.10 SHEAR ADHESION, min 20
15、0 kPa (ISO 4587/ASTM D 1002) The sealant shall fail cohesively when tested in lap shear. The sealant shall be bonded between brass strips which have 0.5 to 2.0 micrometers of mechanically wiped tin. The adhesive layer shall be 0.25 mm thick. ENGINEERING MATERIAL SPECIFICATION WSF-M4G351-A Printed co
16、pies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 3 of 4 3.11 CHEMICAL RESISTANCE (ISO 1817/ASTM D 471, except prepare sample per para 3.8.1) The volumetric swell shall be measured on cured sample of sealant. 3.11.1 Engine Coolant 0.5 % (48 h at 40 +/- 2 C) 50 % WSE-M97B44-B*,
17、 50 % water. 3.11.2 SAE 10W30 Oil, WSE-M2C903-A2* 45 % (48 h at 150 +/- 2 C) 3.11.3 Gasoline, ESE-M4C89-F1* 300 % (48 h at 23 +/- 2 C) 3.11.4 Brake Fluid, ESA-M6C25-A* 25 % (48 h at 40 +/- 2 C) *Or currently released equivalent fluid (see para 5.3). 3.12 SHELF LIFE There shall be no loss in properti
18、es for 3 months from the date of receipt by the customer when stored in the original container at no higher than 38 C and 50 % relative humidity. 3.13 ADDITIONAL REQUIREMENTS Specific requirements for material and/or manufactured parts shall be specified on the Engineering drawing, Engineering parts
19、 specification and/or performance specification. All critical areas with respect to these properties shall be clearly designated on the engineering drawing. 3.14 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which
20、 approval was originally granted. Prior to making any change in the properties, composition, construction, color, processing or labeling of the material originally approved under this specification, whether or not such changes affect the materials ability to meet the specification requirements, the
21、Supplier shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed changes and obtain the written approval of the Materials Engineering activity. Test data, test samples and a new code identification are to be submitted with the request. Substance restrictio
22、ns imposed by law, regulations or Ford, apply to the materials addressed by this document. The restrictions are defined in Engineering Materials Specification WSS-M99P9999-A1. ENGINEERING MATERIAL SPECIFICATION WSF-M4G351-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LL
23、C Page 4 of 4 4. APPROVAL OF MATERIALS Materials defined by this specification must have prior approval by the responsible Materials Engineering activity. Suppliers desiring approval of their materials shall first obtain an expression of interest from the affected Purchasing, Design and Materials En
24、gineering activity. Upon request, the Supplier shall submit to the affected Materials Engineering activity a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of this spec
25、ification (test results, not nominal values), the material designation and code number, and test specimens for Ford evaluation. Fords engineering approval of a material will be based on its performance to this specification and on an assessment of suitability for intended processes and/or applicatio
26、ns. Upon approval, the material will be added to the Engineering Material Approved Source List. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 GLASS TRANSITION TEMPERATURE, Tg, nominal -40 C (ASTM
27、 E 1356) 5.2 COEFFICIENT OF LINEAR THERMAL EXPANSION, nominal 280 -6/ C (ASTM E 228 or TMA) 5.3 For information on currently approved fluids used in para 3.11 of this specification contact: Materials Laboratory 13/100 Fluids Materials Section Research & Engineering Centre Coolants/Greases Ford Motor Company Ltd. Engine Engineering Laindon, Basildon P.O. Box 2053 Essex SS15 6EE, England 21500 Oakwood Blvd. Dearborn, MI 48121 U.S.A. Materials Engineering Product Engineering Office Ford Motor Co. of Australia Ltd. Princes Highway, Norlane Victoria 3214, Australia
