1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2012 05 09 N Status No usage or replacement N. Benipal, NA 1998 03 20 Activated Added A3; Revised para 3; Updated D. Rogers 1989-04-07 SM/EQ15817TP Released M. Siewert WP 3948-a Page 1 of 5 GASKET, STEEL CORE,
2、 FIBER SHEET WSK-M8G225-A WSK-M8G225-A2 WSK-M8G225-A3 NOT TO BE USED FOR NEW DESIGN 1. SCOPE The materials defined by these specifications consist of a perforated low carbon steel core covered equally on both sides with a synthetic rubber bonded inorganic and organic fiber facing. The assembly is im
3、pregnated with a special plastic. 2. APPLICATION These specifications were released originally for cylinder head gaskets. 3. REQUIREMENTS 3.1 QUALITY SYSTEM REQUIREMENTS Material suppliers and part producers must conform to Quality System Requirements, QS-9000. Material specification requirements ar
4、e 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 Supplier Technical Assistance (STA) prior to production parts submission. Appropriate stati
5、stical 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 to a process control plan which has been approved by STA and/or the relevant Materials
6、Activity. ENGINEERING MATERIAL SPECIFICATION WSK-M8G225-A/A2/A3 WP 3948-b Page 2 of 5 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 thermogram
7、s 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. 3.3 CONDITIONING AND TEST
8、CONDITIONS Prior to testing the materials shall be conditioned in an oven at 100 +/- 2 C for 1 h and allowed to cool to 21 - 30 C in a desiccator containing anhydrous calcium chloride. All tests shall be conducted in accordance with ASTM F 104 Type 1 material unless otherwise specified. The requirem
9、ents of this specification are valid for gasket material of 1.2 - 1.9 mm thickness. Test specimens are to be selected from finished gaskets when practicable. 3.4 CONSTRUCTION Consists of a perforated low carbon steel sheet with a material consisting of inorganic and organic fibers and synthetic rubb
10、er bonded to each side of the steel sheet. The assembly is impregnated with a special plastic. 3.4.1 Steel Core Low carbon steel, thickness and finish as specified on Engineering Drawing. 3.4.2 Facing Material The fiber sheet shall be plied uniformly and bonded to each side of the steel core to meet
11、 requirements of the application at the thickness specified on the Engineering Drawing. 3.4.3 Coatings Coatings of gasket as specified on Engineering Drawing. 3.5 ORIGINAL PROPERTIES A A2 A3 3.5.1 Ignition Loss of 27 - 38 25 - 30 15 - 27 Facing Material, % (ASTM F 495) ENGINEERING MATERIAL SPECIFICA
12、TION WSK-M8G225-A/A2/A3 WP 3948-b Page 3 of 5 3.5.2 Compressibility, % 7 - 14 5 - 10 1 - 9 (ASTM F 36, Procedure A) 3.5.3 Recovery, %, min 47 54 54 (ASTM F 36, Procedure A) 3.6 SEALABILITY, mL/h, max 0.2 2 2 (ASTM F 37, Method A, 3.5 MPa flange load, 0.1 MPa internal pressure) 3.7 CREEP RELAXATION,
13、 max 35 - 49 22 - 34 12 - 31 (ASTM F 38, Method B, 22 h at 150 +/- 2 C) 3.8 ADHESION AND CORROSION A A2 A3 (FLTM BV 123-01) 3.8.1 After Heat Aging at 150 +/- 2 C Adhesion, max Rating 2 Rating 2 Rating 2 Corrosion, max Rating 2 Rating 2 Rating 2 3.8.2 After Aging in Humidity Cabinet Adhesion, max R
14、ating 2 Rating 2 Rating 2 Corrosion, max Rating 2 Rating 2 Rating 2 3.9 HEAT AGING (ASTM D 573, 22 h at 200 +/- 2 C) 3.9.1 Compressibility, % 3 - 9 2 - 7 2 - 7 3.8.2 Recovery, %, min 59 50 60 3.10 RESISTANCE TO ASTM OIL No. 1 (ASTM F 146, 5 h at 150 +/- 2 C) 3.10.1 Thickness Change, % 0 to + 3 0 to
15、 2 0 to + 2 3.10.2 Compressibility, % 6 - 14 3 - 8 3 - 8 3.10.3 Recovery, %, min 43 50 60 3.10.4 After immersion the facing material shall be firm and must not separate from the steel core. ENGINEERING MATERIAL SPECIFICATION WSK-M8G225-A/A2/A3 WP 3948-b Page 4 of 5 3.11 RESISTANCE TO ASTM OIL No. 3
16、 (ASTM F 146, 5 h at 150 +/- 2 C) 3.11.1 Thickness Change, % 0 to + 5 0 to + 3 0 to + 3 3.11.2 Compressibility. % 7 - 16 4 - 10 4 - 10 3.11.3 Recovery, min, % 39 58 60 3.11.4 After immersion the facing material shall be firm and must not separate from the steel core. 3.12 RESISTANCE TO ASTM 85 % Fue
17、l C + 15 % Methanol (ASTM F 146, 22 h at 23 +/- 2 C) 3.12.1 Thickness Change, % +5 to +13 +3 to +12 +2 to +10 3.12.2 Compressibility, % 14 - 23 8 - 18 3 - 12 3.12.3 Recovery, min, % 35 48 60 3.12.4 After immersion the facing material shall be firm and must not separate from the steel core. 3.13 RESI
18、STANCE TO COOLANT AND WATER (50:50) Test Method: Immerse in Engine coolant WSE-M97B44-B and distilled water (50:50 Volume %) by using a suitable distillation flask and a reflux condenser for 70 h at boiling temperature. 3.13.1 Thickness Change, % +1 to +5 0 to +5 0 to +5 3.13.2 Compressibility, % 7
19、 15 3 - 9 3 - 9 3.13.3 Recovery, %, min 32 56 60 3.13.4 After immersion the facing material shall be firm and must not separate from the steel core. 3.14 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which approv
20、al was originally granted. ENGINEERING MATERIAL SPECIFICATION WSK-M8G225-A/A2/A3 WP 3948-b Page 5 of 5 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 affe
21、ct 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 samples and a new code iden
22、tification 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 Materials defined by this speci
23、fication 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 Supplier shall submit to the aff
24、ected 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), the material designation
25、 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 Mater
26、ial 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 For information on currently approved engine coolants for use in meeting the requirements to the specification. Materials L
27、aboratory 13/100 Fluids Material Section Research and Engineering Centre Coolants/Greases Ford Motor Company Ltd Engine Engineering Laindon, Basildon PO Box 2053 Essex SS15 6EE, England 21500 Oakwood Boulevard Dearborn, MI 48121, USA Materials Engineering Product Engineering Office Ford Motor Co. of Australia Ltd Princes Highway, Norlane Victoria 3214, Australia
