1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes Rev 01 2012 05 09 N Status No usage or replacement N. Benipal, NA 1998 03 20 Activated K. Gerhards WP 3948-a Page 1 of 4 GASKET, ARAMIDE FIBERS, NBR BINDER WSS-M8G247-A2 NOT TO BE USED FOR NEW DESIGN 1. SCOPE
2、The material defined by this specification is a gasket material comprised of a combination of aramide fibers and nitrile butadiene rubber binder with a steel sheet core. 2. APPLICATION This specification was released originally for gasket material used for the transmission gaskets. 3. REQUIREMENTS 3
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 verification is required. This plan must be revi
4、ewed 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 materials. Part producers using this mate
5、rial 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, may conduct infrared and/or thermal ana
6、lysis 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 and thermograms that correspond to the
7、 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 prior to testing and tested under the sa
8、me conditions unless otherwise specified. ENGINEERING MATERIAL SPECIFICATION WSS-M8G247-A2 WP 3948-b Page 2 of 4 3.4 CONSTRUCTION Aramide fiber impregnated with NBR binder. Thickness, mm 1.8 - 2.2 3.5 ORIGINAL PROPERTIES 3.5.1 Tensile Strength, MPa, min 42 (ASTM F 152, Method C) 3.5.2 Compressibilit
9、y, % 8 - 16 (ASTM F 36, Procedure G) (ASTM F 36, Procedure J) 3.5.3 Recovery, %, min 50 (ASTM F 36, Procedure G) 3.6 ADHESION AND CORROSION (FLTM BV 123-01) 3.6.1 After Heat Aging at 125 +/- 2 C, max Adhesion Corrosion Rating Rating Cast Iron - Cast Iron 2 2 Cast Iron - Aluminium 2 2 Aluminium - Alu
10、minium 2 1 3.6.2 After Aging in Humidity Cabinet Cast Iron - Cast Iron 3 4 Cast Iron - Aluminium 3 4 Aluminium - Aluminium 3 2 3.7 HEAT AGING (ISO 188/ ASTM D 573, 150 +/- 50 air changes/h, 22 h at 125 +/- 2 C) 3.7.1 Compressibility, % 10 - 16 3.7.2 Recovery, %, min 50 3.7.3 Weight Change, % +/- 1 3
11、.8 RESISTANCE TO ASTM OIL NO. 1 (ASTM F 146, 5 h at 150 +/- 2 C) 3.8.1 Compressibility, % 10 - 18 3.8.2 Recovery, %, min 50 3.8.3 Thickness Change, % 0 - 3 3.8.4 Weight Change, % 0 - 8 ENGINEERING MATERIAL SPECIFICATION WSS-M8G247-A2 WP 3948-b Page 3 of 4 3.9 RESISTANCE TO ASTM OIL NO. 3 (ASTM F 146
12、, 5 h at 150 +/- 2 C) 3.9.1 Compressibility, 14 - 20 3.9.2 Recovery, %, min 45 3.9.3 Thickness Change, % 0 - 8 3.9.4 Weight Change, % 6 - 12 3.10 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which approval was or
13、iginally 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 Supplier shall n
14、otify 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 restrictions imposed by la
15、w, regulations or Ford, apply to the materials addressed by this document. The regulations are defined in Engineering Materials Specification WSS-M99P9999-A1. 4. APPROVAL OF MATERIALS Materials defined by this specification must have prior approval by the responsible Materials Engineering activity.
16、Suppliers desiring approval of their 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 report
17、s, signed by a qualified and authorized 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
18、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. 5. GENERAL INFORMATION The information given below is provi
19、ded for clarification and assistance in meeting the requirements of this specification. 5.1 Resistance to Burmah BOT 130M (ASTM F 146, 5 h at 150 +/- 2 C) 5.1.1 Compressibility, % 14 - 20 ENGINEERING MATERIAL SPECIFICATION WSS-M8G247-A2 WP 3948-b Page 4 of 4 5.1.2 Recovery, min 45 5.1.3 Thickness Change, % 0 - 8 5.1.4 Weight Change, % 6 - 12
