Graphite COVA electrodes and nipples are produced according to internal norms derived from the following standards:
        IIEC 60239, Fourth edition, 2005-06
        DIN EN 60239, 2006-03
        (in special cases NEMA or JIS).

Their main properties are the following:
  • Low electrical resistance
  • Good thermal conductivity
  • High resistance to thermal shocks
  • Good mechanical strength
  • High resistance to oxidation
  • Exact mechanical machining
  • Manufacturing within narrow tolerances
  • Safe locking
  • Low graphite electrode consumption