1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Para No. Revisions Rev02 2012 04 12 N Status No usage or replacement named N. Benipal, NA 1978 10 17 Metricated, Renumbered & Retyped CE3H-RD782440E-Supp #11 1963 10 11 Released E7-2839 Page 1 of 2 GASKET, CORK/NITRILE BUTAD
2、IENE SPONGE RUBBER ESE-M8G42-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE: The material defined by this specification is a gasket composed of nitrile butadiene rubber sponge and cork. 2. APPLICATION: This specification was released originally for material used as a truck engine push rod and camshaft val
3、ley-cover and baffle gasket. 3. REQUIREMENTS: All tests shall be conducted in accordance with ASTM F 104, Type 2, unless otherwise specified. 3.1 DENSITY 30-35 lb/ft3 (480-560 kg/m3) 3.2 COMPRESSIBILITY 35 - 50% (ASTM F 36, 100 psi (690 kPa) load) Recovery, min 85% 3.3 TENSILE STRENGTH, min WMD 90 p
4、si (621 kPa) AMD 75 psi (517 kPa) 3.4 FLEXIBILITY Must pass 3.5 IMMERSION IN LIQUIDS Immersion Fluid Test Conditions Thickness Change, max ASTM Oil No. 1 70 h at 100 C -5% ASTM Oil No. 3 70 h at 100 C +5% ASTM Reference Fuel “A“ 24 h at 23 +/- 2 C +10% ASTM Reference Fuel “B“ 24 h at 23 +/- 2 C +15%
5、 3.6 COMPRESSION SET, max 60% (ASTM D 395, Method “A“, 22 h at 70 +/- 1 C) 3.7 GLUED JOINTS The properties of the specification shall apply to sections of the materials with glued joints. ENGINEERING MATERIAL SPECIFICATION ESE-M8G42-A Page 2 of 2 3.7.1 Compressibility and Recovery Tests are to be co
6、nducted on specimens containing a glue line. Original properties must be maintained. 3.7.2 Tensile Strength Original, min WMD 90 psi (621 kPa) AMD 75 psi (517 kPa) After immersion per para 3.5, must not fail in glued joint. 3.7.3 Compression Set, max 60% (ASTM D 395, Method “A“, 22 h at 70 +/- 1 C)
7、3.8 SUPPLIERS RESPONSIBILITY Material supplied to this specification must 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
8、 approved by the affected product engineering office. Procedure for gaining 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 data is for information only and is not a requirement. 5.1 HARDNESS, DUROMETER “A“ 30 - 50 (ASTM D 2240)
