There are many kinds of radiators on the market now. Although they are similar in appearance, the performance of radiators made of different materials is also different, which has a great influence on the heating effect. At present, the materials of radiator can be roughly divided into cast iron, copper-aluminum composite, pure copper, steel and aluminum. Although the cast iron radiator has corrosion resistance, long service life and low price, its disadvantages are quite obvious, not only ugly in appearance, but also the radiator made of this material is not environmentally friendly. At present, it is not recommended to use radiators made of this material, and cast iron radiators are rarely used. The latter two kinds of copper-aluminum composite radiator and pure copper radiator have good thermal conductivity, beautiful appearance and can save space, but they are both expensive, especially pure copper radiator, which has good performance but very high price; At present, the latter two kinds of radiators, steel and aluminum, are popular in the market. Steel radiator has good heat dissipation effect, beautiful appearance and reasonable price, while aluminum radiator can be divided into two types: high pressure and stretched aluminum alloy welding, which are characterized by rapid temperature rise, energy saving and environmental protection, economy and practicality.