1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2012 05 09 N Status No usage or replacement N. Benipal, NA 1997 07 16 Activated Reactivated; Updated K. Gerhards 1993-01-04 EP00E10258796000 Released K. Gerhards WP 3948-a Page 1 of 4 GASKET, ARAMIDE FIBERS, N
2、BR BINDER WSK-M8G247-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a gasket material comprised of a combination of aramide fibers and nitrile butadiene rubber binder. 2. APPLICATION This specification was released originally for gasket material used for the t
3、ransmission gaskets. 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 Plan for ongoing production verificati
4、on 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 assure consistent processing of the mat
5、erials. 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 ANALYSIS Ford Motor Company, at its option, m
6、ay 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. All samples shall produce IR spectra
7、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 % relative humidity for not less than 24 h pr
8、ior to testing and tested under the same conditions unless otherwise specified. ENGINEERING MATERIAL SPECIFICATION WSK-M8G247-A WP 3948-b Page 2 of 4 3.4 CONSTRUCTION Aramide fiber impregnated with NBR binder and mineral filler. THICKNESS, mm 0.4 - 1.5 1.5 3.5 ORIGINAL PROPERTIES 3.5.1 Density, g/cm
9、3 1.5 - 1.7 1.5 - 1.7 (ASTM D 297) 3.5.2 Tensile Strength, 8.0 8.0 MPa, min (ASTM F 152, Method C) 3.5.3 Compressibility, % 16 - 23 14 - 20 (ASTM F 36, Procedure G) 3.5.4 Recovery, %, min 55 55 (ASTM F 36, Procedure G) 3.6 SEALABILITY, mL/h, max 0.1 0.1 (ASTM F 37, Method A, ASTM Fuel A, 6.9 MPa fla
10、nge load, 0.7 MPa internal pressure) 3.7 CREEP RELAXATION, %, max 43 60 (ASTM F 38, Method B, 22 h at 125 +/- 2 C) 3.8 ADHESION AND CORROSION (FLTM BV 123-01) 3.8.1 After Heat Aging at 125 +/- 2 C Adhesion, Rating, max 2 2 Corrosion, Rating, max 2 2 3.8.2 After Aging in Humidity Cabinet Adhesion, Ra
11、ting, max 2 2 Corrosion, Rating, max 2 2 3.9 DIMENSIONAL STABILITY (ASTM F 1087) 3.9.1 Dry Condition, Change, +/- 2 +/- 2 %, max 3.9.2 Wet Condition, Change, +/- 2 +/- 2 %, max THICKNESS, mm 0.4 - 1.5 1.5 ENGINEERING MATERIAL SPECIFICATION WSK-M8G247-A WP 3948-b Page 3 of 4 3.10 HEAT AGING (ISO 188/
12、 ASTM D 573, 150 +/- 50 air changes/h, 22 h at 125 +/- 2 C) 3.10.1 Compressibility, % 15 - 22 12 - 19 3.10.2 Recovery, %, min 55 55 3.10.3 Weight change, % 0 to - 2 0 to - 2 3.11 RESISTANCE TO ASTM OIL NO. 1 (ASTM F 146, 5 h at 150 +/- 2 C) 3.11.1 Compressibility, % 22 - 35 17 - 27 3.11.2 Recovery,
13、 min 45 50 3.11.3 Thickness Change, % 0 to + 6 0 to + 3 3.11.4 Weight Change, % + 5 to + 20 0 to + 8 3.12 RESISTANCE TO ASTM OIL NO. 3 (ASTM F 146, 5 h at 150 +/- 2 C) 3.12.1 Compressibility, % 25 - 40 20 - 32 3.12.2 Recovery, %, min 45 55 3.12.3 Thickness Change, % 0 to + 10 0 to + 8 3.12.4 Weigh
14、t Change, % +10 to + 25 + 5 to + 15 3.13 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which approval was originally granted. Prior to making any change in the properties, composition, construction, color, process
15、ing 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 Supplier shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed changes and
16、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 restrictions imposed by law, regulations or Ford, apply to the materials addressed by this document. The regulations are defined in
17、 Engineering Materials Specification WSS-M99P9999-A1. ENGINEERING MATERIAL SPECIFICATION WSK-M8G247-A WP 3948-b 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 thei
18、r materials shall first obtain an expression of interest from the affected Purchasing, Design and Materials Engineering 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 author
19、ized representative of the test facility, demonstrating full compliance with all the requirements of this specification (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 applications. Upon approval, the material will be added to the Engineering Material Approved Source List.
