If a given material has high thermal conductivity will it heat it's surroundings faster (lets say air) while it's own temp is reduced fast?

Let say we have a piece of aluminium that is 200 C and a piece of steel that is also 200 C and we put them each in a equally sized 2x2 meter room with equal tempI'm guessing the air in the room with the aluminium will get heated faster due to it's higher thermal conductivity or am I wrong?Will the air in the room with the steel be warmer longer, but wont reach higher temp compared to the other room?