consideration

The 1st time	Aluminum（Al）	Ion（Fe）	Capper（Cu）
Temperature of the first water	２７．１	２６・０	２１．９
Temperature of metal	５０．５	５１．９	４７．６
Temperature of water put metal	２８. ９	２７. １	２２．３

The 2st time	Aluminum（Al）	Iron（Fe）	Copper（Cu）
Temperature of the first water	２１．９	２２．７	２２．１
Temperature of metal	５８．７	６１．６	６０．５
Temperature of water put metal	２６。９	２３。８	２２．４

These things show that in order of aluminum, iron, and copper, temperature is going up. Aluminum can say from this that there is No. 1 heat-conducting characteristic in this.