Document 4QJR5rNOBdBN0znK5kRp2pzvR
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Engineering Material Specification
^MalarWNam*.. GASKET, ASBESTOS/STYRENE FIBER COMPOSITION
1,. SCOPE
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* Hie material defined by this specification is An asbestos/styrene fiber gasket, which has
been coated on both sides with a graphite compound and post cured to increase abrasion . resistance and improve bolt torque retention.
S. APPLICATION
This specification was released originally for material used as a gasket for the rear axle housing cover.
3. REQUIREMENTS
Conditioning prior to testing shall be in conformance with ASTM F 104, Type 1, unless otherwise specified.
3.1 TENSILE STRENGTH, min (ASTM F 39, Tested perpendicular to the grain)
12S0 psi (8.6MPa)
3.2 COMPRESSIBILITY, min (ASTM F 36, Procedure "A")
Recovery, min
18% 40%
3.3 IMMERSION IN LIQUIDS (ASTM D 471, 22 h at 23 2C)
ASTM Oil No. 1 ASTM Oil No. 3 ASTM Fuel "A" i ASTM Fuel "Bn
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Water
Weight Increase, max
46% 70% 35% 55% 50%
3.4 COMPRESSION SET, max
^
(ASTM D 395, Method "A", 22 h at 70 1C)
15%
3.5 SUPPLIER'S RESPONSIBILITY
Material supplied to this specification must
equivalent to that originally
approved. Changes in formulation or processing shaEr^et 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 gaining approval of a specific material to a new/existing ES-M specification is contained in Supplier Procedure 1-A. Approved new suppliers will be added to the
Engineering Materials Approved Source List.
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