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 1991 09 11 NE01E10127076023 Released E. J. Duda WP 3948-a Page 1 of 4 GASKET, NON-ASBESTOS WITH
2、NITRILE RUBBER BINDER WSE-M8G240-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a general purpose gasket material fabricated from a non-asbestos reinforcing compound with nitrile rubber. 2. APPLICATION This specification was released originally for material re
3、quiring good fuel, oil, coolant, water resistance, and good dimensional stability for such applications as water pump front covers and intake manifold gaskets where low to moderate flange loading is required. 3. REQUIREMENTS 3.1 QUALITY SYSTEM REQUIREMENTS Material suppliers and part producers must
4、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 reviewed and approved by the relevant Ford Materials activity and/or Ford Supp
5、lier 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 material in their products, must use Ford approved materials and must conform
6、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 analysis of material/parts supplied to this specification. The IR spectra and
7、 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 reference standard when tested under the same conditions. ENGINEERING MAT
8、ERIAL SPECIFICATION WSE-M8G240-A WP 3948-b Page 2 of 4 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 same c
9、onditions unless otherwise specified. 3.4 ORIGINAL PROPERTIES 3.4.1 Density 1.16 to 1.38 g/cm3 (ISO 1183/ASTM D 297) 3.4.2 Tensile Strength, min 13.0 MPa (ASTM F 152, Method C) 3.4.3 Compressibility 13 to 25 % (ASTM F 36, Procedure A) 3.4.4 Recovery, min 40 % (ASTM F 36, Procedure A) 3.5 SEALABILITY
10、, max 4.5 mL/h (ASTM F 37, 6.9 MPa flange load, 101.3 kPa internal pressure) 3.6 CREEP RELAXATION, max 44 % (ASTM F 38, Method B, 0.76 mm thick test specimens, 22 h at 125 +/- 2 C) 3.7 ADHESION AND CORROSION TBD (FLTM BV 123-01) 3.8 DIMENSIONAL STABILITY, max (ASTM F 1087) 3.8.1 Low Humidity % Chang
11、e, max (5 h at 100 +/- 2 C) AMD 0.38 MD 0.20 3.8.2 High Humidity % Change, max (22 h in water at 23 +/- 2 C) AMD 1.50 MD 0.60 3.9 HEAT AGING (ISO 188/ASTM D 573, 22 h at 125 +/- 2 C) 3.9.1 Compressibility 9 to 21 % (ASTM F 36, Procedure A) 3.9.2 Recovery, min 40 % (ASTM F 36, Procedure A) 3.9.3 Weig
12、ht Change, max - 1.2 % ENGINEERING MATERIAL SPECIFICATION WSE-M8G240-A WP 3948-b Page 3 of 4 3.10 RESISTANCE TO ASTM OIL NO. 1 (ASTM F 146, 5 h at 125 +/- 2 C) 3.10.1 Compressibility 9 to 21 % 3.10.2 Thickness Change 0 to + 5 % 3.11 RESISTANCE TO ASTM OIL No. 3 (ASTM F 146, 5 h at 125 +/- 2 C) 3.11.
13、1 Compressibility 10 to 23 % 3.11.2 Thickness Change 0 to 4 % 3.12 RESISTANCE TO ASTM FUEL C + METHANOL 85 vol. % Fuel C + 15 vol. % methanol (ASTM F 146, 22 h at 23 +/- 2 C) 3.12.1 Compressibility 25 to 38 % 3.12.2 Thickness Change 0 to + 22 % 3.12.3 Weight Change 10 to 46 % 3.12.4 Delamination Mat
14、erial did (Added for laminated materials) not delaminate Test Method: Firmly hold the sample at one point on a circular mandrel and force slowly but firmly under finger pressure to contact the full diameter of the mandrel. Failure shall be any cracks, breaks or surface separation or delamination at
15、the approximate time (5 +/- 1 s) required to flex the specimen. Note: The originator will specify the mandrel size. 3.13 RESISTANCE TO COOLANT AND WATER (50:50) (ASTM F 146) 3.13.1 Compressibility 30 to 42 % 3.13.2 Thickness Change 0 to + 18 3.13.3 Weight Change + 50 % - may drop Test Method: Immers
16、e the sample in engine coolant WSE-M97B44-B and distilled water (50:50 vol. %). Use a suitable distillation flask and a reflux condenser and reflux for 70 h at boiling temperature. ENGINEERING MATERIAL SPECIFICATION WSE-M8G240-A WP 3948-b Page 4 of 4 3.14 SUPPLIERS RESPONSIBILITY All materials suppl
17、ied 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, processing or labeling of the material originally approved under this specification, whether
18、 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 obtain the written approval of the Materials Engineering activity. Test data, test sa
19、mples 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 Engineering Materials Specification WSS-M99P9999-A1. 4. APPROVAL OF MATERIALS Materi
20、als 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 Engineering activity. Upon request, the Supplie
21、r 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 specification (test results, not nominal values),
22、 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.
