The purpose of a radiator is to transfer heat from the engine to the atmosphere, so radiators need to be made of a material with a high heat transfer coefficient. Aluminum has a high heat transfer coefficient. In other words, aluminum conducts heat very well. There are other materials, such as copper, which conduct even better, but aluminum is more economical to use than copper.
most car radiators are copper or aluminum and plastic.
Older vehicles had copper and steel radiators, newer vehicles are made of aluminum and plastic.
They used to be copper and steel but now they are made of aluminum and plastic.
Aluminum
They aren't. Older ones are made of copper, now it's aluminum. Platinum is used in the catalyctic converter.
Most newer cars radiators are made of aluminum to save weight and it dissipates heat more effeciently
Radiators are made of a lot of metals with high melting points (example: Aluminum)
It's an aluminum radiator with plastic tanks.
A household radiator is cast iron. An automotive radiator would be aluminum or copper.
This varies for every car made. One easy way to tell if it is aluminum or not is to use a magnet. Aluminum is not magnetic. Common parts made of aluminum are the radiator, intake manifold, cylinder heads, engine block, transmission case and/or bellhousing, heater core, bumpers, decorative trim, wheels, etc. Not all vehicles are equipped with all or any of these aluminum parts, however.
Probably aluminum and plastic.
The core is typically copper with aluminum fins