What Is Extra Deep Drawing Steel (EDDS)?
Extra deep drawing steel (EDDS), is a type of cold-rolled steel. This steel material is produced by first subjecting hot-rolled steel (SPHC) to acid pickling and then to cold rolling at room temperature. Cold rolling is the process of rolling metal after heating it to 600°C or less. EDDS is distinguished by its superior elongation properties compared to standard SPCC steel, making it well-suited for deep drawing processes. Its formability and processability allow it to undergo complex processing that might challenge other steel plates.
Uses of EDDS
EDDS is primarily used in applications requiring excellent deep drawing capabilities. It’s particularly appropriate for automotive exterior parts like fenders and quarter panels. However, its strength is lower than regular cold-rolled steel, which limits its suitability for structural purposes. The absence of a protective film on its surface, due to acid pickling, makes EDDS highly susceptible to rust. To combat this, it usually undergoes surface treatments such as plating or painting post-processing. While EDDS is not ideal for structural applications due to its lower strength, its excellent formability and smooth surface make it valuable for specific uses where these characteristics are essential.