The tower structural steel JT245 produced in Jinan Iron and Steel Ltd.Co.was developed by alloying addition Cu、P、Nb etc.Because of the alloying element, tight and continuous amorphous layer was formed on steel plate.As a result,the steel plate is of good corrosion-resisting atmosphere properties.The JT245 steel plate also has good mechanical property and weldability.The steel plate could meet the need of tower structure very well.