1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Release No. Release/Revision Rev 02 2012 05 08 N Status No usage or replacement N. Benipal, NA 1989 07 31 B/031526TC Retyped minor changes, was 7 sheets 1985 09 24 SM/ER2708TC Released Page 1 of 4 GASKET, ARAMID FIBRE - NITR
2、ILE RUBBER BINDER ESD-M8G191-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE: The material defined by this specification is a gasket formed from aramid fibres bonded with nitrile rubber. 2. APPLICATION: This specification was released originally for material suitable for moderate to high flange pressures,
3、- 50 MPa max, and for high temperatures, - 250 C max. Its suitability for use with particular fluids such as methanol containing fuel and coolant solutions should be confirmed by the particular Component Engineering area as the gasket may be affected by contact with these media. 3. REQUIREMENTS: The
4、 requirements of this specification are valid for gaskets of 0,4 to 0,8 mm thickness. The machine direction should be clearly marked on all test sheets. 3.1 COMPRESSIBILITY % 10 - 25 ASTM F36; Procedure A 3.2 RECOVERY %, min 50 ASTM F36; Procedure A 3.3 TENSILE STRENGTH MPa, min ASTM F152; condition
5、 as Type 1; Procedure A; specimen ASTM D412 die A; 23 +/- 2 C. 3.3.1 With machine direction, 18 3.3.2 Across machine direction, 15 3.4 HEAT AGEING TEST METHOD Condition material according to ASTM F152 type 1 material. Specimens for the various tests should be placed between steel plates of 150 x 150
6、 x 13 mm and then aged in an oven for 22 h at 150 +/- 2 C. The specimens are removed and allowed to cool to 23 +/- 2 C in a dessicator before conducting the following tests:- ENGINEERING MATERIAL SPECIFICATION ESD-M8G191-A Page 2 of 4 3.4.1 Compressibility %, max 25 3.4.2 Recovery %, min 50 3.4.3 Te
7、nsile Strength MPa, min 3.4.3.1 WMD, 18 3.4.3.2 AMD, 15 3.4.4 Weight Change %, max +/- 2 Sample 25 x 50 mm 3.5 IMMERSION IN ASTM OIL NO. 1 ASTM F146; material type 1; 22 h; 150 +/- 2 C 3.5.1 Compressibility % 10 - 25 3.5.2 Recovery %, min 50 3.5.3 Tensile Strength, MPa, min 3.5.3.1 WMD, 17 3.5.3.2 A
8、MD, 12 3.5.4 Weight Change %, max 30 3.5.5 Thickness Change % 0 - 10 3.6 IMMERSION IN ASTM OIL NO. 3 ASTM F146; material type 1; 22 h; 150 +/- 2 C 3.6.1 Compressibility, % 13 - 28 3.6.2 Recovery %, min 55 3.6.3 Tensile Strength MPa, min 3.6.3.1 WMD, 10 3.6.3.2 AMD, 7 3.6.4 Weight Change %, max 35 3.
9、6.5 Thickness Change % 0 - 10 ENGINEERING MATERIAL SPECIFICATION ESD-M8G191-A Page 3 of 4 3.7 COMPRESSION SET %, max 20 ASTM D395; Method A; 22 h; 150 +/- 2 C condition as ASTM F146 type 1 material. NOTE: Thickness measurement according to technique in ASTM F36 foot diameter 12,8 mm total load on fo
10、ot 66 +/- 5 N reading taken after 30 s. 3.8 IGNITION LOSS % 35 - 50 ASTM F495 3.9 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 thermograms establ
11、ished 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. 3.10 REQUIREMENTS FOR THE FINISHED
12、 PART As specified on Engineering drawing. 3.11 STATISTICAL PROCESS Suppliers must conform to the requirements of Ford Quality System Standard Q-101. A mutually acceptable Control Plan as described therein is required for material/source approval. Appropriate statistical tools must be used to analyz
13、e process/product data so that variation in the final product is continuously reduced. ENGINEERING MATERIAL SPECIFICATION ESD-M8G191-A Page 4 of 4 3.12 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which approval
14、was originally granted. Prior to making any change in the properties, composition, construction, colour, processing or labelling of the material originally approved under this specification, whether or not such changes affect the materials ability to meet the specification requirements, the Supplier
15、 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 restrictions impos
16、ed by law, regulations or Ford, apply to the materials addressed by this document. The restrictions are defined in Engineering Material Specification WSS-M99P9999-A1, unless a different suffix (e.g. A2 or A3) is specified on the engineering document for the application. 4. APPROVAL OF MATERIALS: Mat
17、erials 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 Supp
18、lier shall submit to the affected Materials Engineering activity its own laboratory report to the specification (test results, not nominal values), the material designation and code number, and test specimens for Ford evaluation. Upon approval, the material will be added to the Engineering Material Approved Source List.
