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SILVER-GRAPHITE ELKANITES - DF SERIES

 

 The Elkanite DF series is produced primarily for specialised applications in which the contact material is required to have self-lubricating properties.

 The material can be produced in extruded form and the contacts are cut from the extruded stock so that the contact face is perpendicular to the direction of extrusion. In this form the erosion rate of Elkanite DF silver graphite is minimized; an important feature since arcing times tend to be extended by the presence of carbon.

 

  Product name

Nominal Composition

Electrical Conductivity % IACS

Thermal Conductivity W/mK

Hardness

 

Elkanite D58-1%

99% Ag-C

96

400

40 HV

Elkanite D58-2%

98% Ag-C

86

375

40 HV

Elkanite D58-5%

95% Ag-C

55

240

35 HV

 Elkanite D58-1% offers the greatest ductility of the DF range although there is a reduced lubricity and weld resistance

 Elkanite D58-2% offers a combination of high conductivity with good lubricity and weld resistance.

 Elkanite D58-5% provides the maximum lubricity and weld resistance.

 Elkanite DF series silver graphite are usually attached to copper or copper alloy backings by brazing or welding. To facilitate this operation Elkanite DF contacts are specially treated prior to despatch. In view of this it is important when ordering to ensure that the contact drawing specifies which face is to be bonded to the backing.

 The specific properties of the Elkanite DF series make them particularly attractive in current-limiting miniature circuit breakers (MCB's) since the nature of the device dictates that the contacts should never weld together when tipped.

 

All Mallory Alloys Group products conform to, if not exceed, the relevant standards as assured by the Quality Management System Quality Management System - ISO 9002, EN 29002, BS5750-2


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