Type of electrode
Grade code
Applicable type of furnace

Regular power
Graphite electrodes
RP
Electric arc furnace in regular power; Mine hot furnace at small and middle scale

Impregnated Graphite electrodes
IP
Electric arc furnace in regular power; Mine hot furnace at middle and large scale; Partial electric arc furnace in high power

High power
Graphite electrodes
HP
Electric arc furnace in high power; Partial electric arc furnace in super-high power

Super high power
Graphite electrodes
SHP
Partial electric arc furnace in high power; Partial electric arc furnace in super-high power.

Ultra high power
Graphite electrodes
UHP
Electric arc furnace in super-high power.