1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Para No. Revisions Rev 02 2012 04 12 N Status A No usage or replacement N. Benipal, NA 1978 06 12 Metricated & Retyped CE3H-RD782440-E 1963 10 08 Released E7-2830 Page 1 of 2 GASKET, ALUMINUM/NITRILE BUTADIENE RUBBER COATED
2、NOT FOR NEW DESIGNESF-M8G64-A GASKET, STEEL/NITRILE BUTADIENE RUBBER COATED ESF-M8G64-B 1. SCOPE: The material defined by this specification is metal base, coated on each side with a firmly bonded synthetic rubber, and an additional nonadhesive coating to facilitate removal of gaskets at disassembly
3、 from adjoining metal components. This material has exceptional tensile and compressive strength as well as excellent sealing and spacer characteristics. It is especially recommended for sealing fluids at ambient temperatures up to 177 C, where high bolt torque retention is a critical factor. 2. APP
4、LICATION: This specification was released originally for material used on carburetors, between booster venturi support and mounting screw. 3. REQUIREMENTS: 3.1 THICKNESS OF COATING The material shall be coated with any thickness of nitrile butadiene rubber to meet the requirements of the application
5、 and shall be specified according to individual engineering drawings. 3.2 METAL BASE Shall conform to the following specifications: ESF-M8G64-A: SAE AA5052-H38 Tensile Strength, min 39 000 psi (269 MPa) Density 0.097 lb/in3 (2.68 g/cm3) Hardness, Brinell 70 - 80 (500 kg, load) ESF-M8G64-B: SAE 1010
6、OR EQUIVALENT Tensile Strength, min 39 000 psi (269 MPa) ENGINEERING MATERIAL SPECIFICATION ESF-M8G64-A/B Page 2 of 2 3.3 COATING Shall be suitably compounded nitrile butadiene rubber which, when press cured, shall have the following characteristics: (0.075 in (1.9 mm) thick slab cured 12 min at 153
7、 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“) 3.3.3 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
8、 D 471) Thickness Immersion Fluid Test Conditions Change, max ASTM Reference Fuel “A“ 5 h at 23 +/- 2 C 2% ASTM Reference Fuel “B“ 5 h at 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 RESPONSIBILITY Material supplied to this specification mus
9、t be equivalent to that originally approved. Changes in formulation or processing shall not be made without prior approval as described in Supplier Procedure I-A. 4. APPROVAL OF SUPPLIERS: Suppliers to this specification must be approved by the affected product engineering office. Procedure for gain
10、ing approval of a specific material to a new/existing ES-M specification is contained in Supplier Procedure I-A. Approved new suppliers will be added to the Engineering Materials Approved Source List. 5. GENERAL INFORMATION: This information is for direction of the user and is not a requirement for the supplier. These two materials may be considered interchangeable, unless rust would be detrimental.
