1. Low metal consumption. Most steel radiators are made of thin steel plates by pressing and welding, and the metal thermal strength can reach 0.8- 1.0W(kg/℃), while the metal thermal strength of cast iron radiators is generally only about 0.3 W(kg/℃).
2. High compressive strength. The bearing capacity of cast iron radiator is generally Pb=0.4~0.5MPa, the maximum working pressure of steel radiator and cylindrical radiator can reach 0.8MPa, and the bearing capacity of steel string is higher, reaching 1.0MPa. Therefore, from the bearing point of view, steel radiator is suitable for high-rise building heating and high-temperature water heating system.
3. Beautiful and neat appearance, small floor space and easy layout. For example, plate-type and flat-tube radiators can also be painted with various colors and patterns on the outer surface, which is in harmony with architecture and interior decoration. The steel radiator is low in height, thin in thickness, small in floor space and easy to arrange.
4. Except the steel column radiator, the steel radiator has less water capacity and poor thermal stability. When the water supply temperature is low and intermittent heating is used, the heat dissipation effect is obviously reduced.
The main disadvantage of steel radiator is that it is easy to be corroded and its service life is shorter than that of cast iron radiator. The practical experience shows that when the oxygen content in the make-up water of hot water heating system is high or the chlorine ion content in the system water is high, the steel radiator is prone to internal corrosion. In addition, steel radiators should not be used in steam heating systems. It is not suitable to set steel radiator in the production workshop with corrosive gas or in the room with high relative humidity.