1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Para No. Revisions1978 06 12 Metricated & Retyped CE3H-RD782440-E1963 10 08 Released E7-2830Page 1 of 2GASKET, ALUMINUM/NITRILE BUTADIENE RUBBER COATED ESF-M8G64-AGASKET, STEEL/NITRILE BUTADIENE RUBBER COATED ESF-M8G64-B1. SCO
2、PE:The material defined by this specification is metal base, coated on eachside with a firmly bonded synthetic rubber, and an additional nonadhesivecoating to facilitate removal of gaskets at disassembly from adjoiningmetal components. This material has exceptional tensile and compressivestrength as
3、 well as excellent sealing and spacer characteristics. It isespecially recommended for sealing fluids at ambient temperatures up to177 C, where high bolt torque retention is a critical factor.2. APPLICATION:This specification was released originally for material used oncarburetors, between booster v
4、enturi support and mounting screw.3. REQUIREMENTS:3.1 THICKNESS OF COATINGThe material shall be coated with any thickness of nitrilebutadiene rubber to meet the requirements of the application andshall be specified according to individual engineering drawings.3.2 METAL BASEShall conform to the follo
5、wing specifications:ESF-M8G64-A:SAE AA5052-H38Tensile Strength, min 39 000 psi (269 MPa)Density 0.097 lb/in 3 (2.68 g/cm 3 )Hardness, Brinell 70 - 80(500 kg, load)ESF-M8G64-B:SAE 1010 OR EQUIVALENTTensile Strength, min 39 000 psi (269 MPa)ENGINEERING MATERIAL SPECIFICATION ESF-M8G64-A/BPage 2 of 23.
6、3 COATINGShall be suitably compounded nitrile butadiene rubber which, whenpress cured, shall have the following characteristics: (0.075 in(1.9 mm) thick slab cured 12 min at 153 C).3.3.1 Hardness, Durometer “A“ 70 - 80(ASTM D 2240)3.3.2 Tensile Strength, min 1100 psi (7.6 MPa)(ASTM D 412, Die “A“)3.
7、3.3 Recovery, min 80%(ASTM F 36, Procedure “E“)3.3.4 Compression Set, max 15%(ASTM D 395 Method “B“, 25%deflection, 22 h at 70 +/- 1 C)3.3.5 Immersion in Liquids(ASTM D 471)ThicknessImmersion Fluid Test Conditions Change, maxASTM Reference Fuel “A“ 5 h at 23 +/- 2 C 2%ASTM Reference Fuel “B“ 5 h at
8、23 +/- 2 C 15%ASTM Oil No. 1 5 h at 149 +/- 3 C 5%ASTM Oil No. 3 5 h at 149 +/- 3 C 10%3.4 SUPPLIERS RESPONSIBILITYMaterial supplied to this specification must be equivalent to thatoriginally approved. Changes in formulation or processing shallnot be made without prior approval as described in Suppl
9、ierProcedure I-A.4. APPROVAL OF SUPPLIERS:Suppliers to this specification must be approved by the affected productengineering office. Procedure for gaining approval of a specificmaterial to a new/existing ES-M specification is contained in SupplierProcedure I-A. Approved new suppliers will be added to the EngineeringMaterials Approved Source List.5. GENERAL INFORMATION:This information is for direction of the user and is not a requirementfor the supplier.These two materials may be considered interchangeable, unless rust wouldbe detrimental.
