Dalekanium

Dalekanium was the metallic material that Dalek casings were made of. It was composed of "bonded polycarbide".

Abilities
It was bulletproof and immune to most lasers and bombs, making a Dalek hard to defeat. Dalekanium could attract gamma radiation. Dalekanium panels were attached to the Empire State Building in 1930 to attract gamma radiation, which would introduce Dalek DNA into Humans that the Cult of Skaro had captured. (DW: Evolution of the Daleks)

Dalekanium was vulnerable to Nitro-9 and to Anti-Tank Rockets. (DW: Remembrance of the Daleks) as well as Dalek gunstick fire. (DW: Victory of the Daleks)

Metalert was a reinforced type of Dalekanium. The casing was infused with Flidor gold and sap from the extinct Arkellis flower. The rareness of these substances meant that only Dalek Sec used this substance. (DWF: Birth of a Legend)

Dalekanium was a good conductor. (VG: City of the Daleks)


 * Whether this is an actual metal or merely an alloy is unknown.