1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Para No. Revisions1979 01 10 Metricated, Renumbered & Retyped CAH2-8233851969 06 19 Released COY2-960330Page 1 of 2ANTISQUEAK, GRAPHITE AND POLYETHYLENE BLEND ESA-M6G10-A1. SCOPE:The material defined by this specification is a
2、 high density polyethyleneresin blended with graphite having high abrasion resistance, plusresistance to penetration by oils, greases, chemicals and moisture.2. APPLICATION:This specification was released originally for material used as aninterleaf insert in automotive leaf springs.3. REQUIREMENTS:3
3、.1 BASE MATERIAL, Molded Test Specimen (Compression molded)3.1.1 Flow Rate, max 3.5 g/10 min(ASTM D 1238)3.1.2 Tensile Strength, min 3,100 psi (21.4 MPa)(ASTM D 638, 2.0 in (50 mm)/min pull)Elongation at Break, min 40%3.1.3 Specific Gravity 0.95 - 1.05(ASTM D 792)3.1.4 Deflection Temperature, min 63
4、 C(ASTM D 648, 66 psi (455 kPa)3.1.5 Deformation Under Load 15%(ASTM D 621, Method “A“, 500 lb(227 kg) load at 50 C)3.1.6 Graphite Content, by weight 4 - 6%Graphite Particle Size 96 minimum to be80 or less3.2 MOLDED PARTS - QUALITY CONFORMANCE3.2.1 Specific Gravity 0.95 - 1.05(ASTM D 792)3.2.2 Flow
5、Rate, max 3.0 g/10 min(ASTM D 1238)ENGINEERING MATERIAL SPECIFICATION ESA-M6G10-APage 2 of 23.3 Additional properties of the molded part such as below may bespecified on the engineering drawing or in the engineeringperformance specification when required.3.3.1 Cold Impact Test Must not breakTest Met
6、hod: Condition part 30 min at -40 C. Drop a1-7/8 in (48 mm) diameter steel ball, 16 +/- 1 oz (454+/- 28 g), from a height of 12 in (300 mm) onto the partsupported by a: 2 in (50 mm) ring, 1/8 in (3.2 mm) radiuson edge. Test to be run at -40 C.3.3.2 Cold Bend Test Must not breakTest Method: Condition
7、 part 30 min at -40 C, test at-40 C. Bend part a minimum of 10 over a 1/4 in(6.4 mm) mandrel.3.3.3 Solvent ResistanceNo deleterious effect such as crazing, cracking andsoftening or other surface conditions after 1 h immersionat 23 +/- 2 C in each of the following mixtures consistingof:. 5% sodium ch
8、loride and water. 5% calcium chloride and water. 50% gasoline and 50% grease (ESB-M1C82-A)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 Su
9、pplierProcedure 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.
