Copper has a CTE of 16.6 parts per million/degree C
(16.6E-6/C)
0.0000055
nickel
thermal expansion depends on Temperature and material of steel
Thermal expanasion coefficient fro monel is 0,0000075 m/mºC. More info at http://www.engineeringtoolbox.com/linear-expansion-coefficients-d_95.html
caz they have a positive temperature coefficient
Aluminum has a higher thermal expansion coefficient than copper because its crystal structure allows for larger atomic movements when heated. This results in a greater expansion of aluminum compared to copper when exposed to heat. Additionally, aluminum has a lower density and stronger interatomic bonds, leading to a higher degree of expansion when heated.
The material with the highest coefficient of thermal expansion is typically graphite.
The coefficient of thermal expansion of air is approximately 0.00367 per degree Celsius.
assuming it is pure copper and not an alloy, 17(k), 9.3 Co
The volumetric thermal expansion coefficient of air is approximately 0.00367 per degree Celsius.
Copper is a very goot thermal conductor.The thermal conductivity of copper is 401 W/m.K.This the motivation for the use of copper utensils in the kitchen.
0.0000055
The copper has a higher thermal expansion coefficient than the iron. The copper wants to get longer relative to the iron so the bar bends away from the iron strip. For example if iron is on top and copper on the bottom the bar bows downward. This seems opposite to your question conclusion
Physical properties of copper wire that are independent of the amount of matter include conductivity, resistivity, melting point, and thermal expansion coefficient. These properties remain constant regardless of the quantity of copper wire present.
nickel
thermal expansion depends on Temperature and material of steel
Thermal expanasion coefficient fro monel is 0,0000075 m/mºC. More info at http://www.engineeringtoolbox.com/linear-expansion-coefficients-d_95.html