ND steel is a new type of low alloy structural steel, compared with other steel, like low-carbon steel, Corten, CR1A, ND steel has the advantage of excellent corrosion resistance and mechanical property. The experimental results showed that the corrosion resistance of ND steel in aqueous solution like sulfuric acid, hydrochloric acid and sodium chloride is higher than carbon steel. The most prominent feature is the ability of sulfuric acid dew point corrosion resistance; the mechanical property is higher and stable than carbon steel from room temperature to 500℃, and the welding performance is nice. ND steel always used for manufacturing economizer, heat exchanger, air pre-heater, since 1990, ND steel has widely been used in the industry of petrifaction and electricity.