Iialloyi ze-tungsten zesilivere ziqulethe phakathi kwe-15-70% yesilivere.Zisetyenziswa ikakhulu kunxibelelwano lombane-ngokubanzi izixhobo ezinobunzima obuphantsi kombane ophezulu,
ezifana nokunxibelelana okuhambayo kwizaphuli zesekethe phakathi kwe-100 kunye ne-800 A, i-earth leakage breakers, ukunxibelelana okuhambayo kwi-air circuit breaker phakathi kwe-1000 kunye ne-10000 A, i-thermostats, i-breaker circuit breakers, i-arcing contact for arcing contactors ezinkulu, i-moulded-case circuit breakers kunye nobunzima. -layisha abafowunelwa be-AC / DC, njl.