Deep-Drawing Steel (DDS)

U. S. Steel provides DDS as a low-carbon steel grade to meet improved drawability compared with DS Type B. The usual metallurgical approach is to provide DDS as a low carbon/low manganese steel chemistry combined with low amounts of residual elements. Cold Rolled and Electrolytic Zinc & Zinc-Iron Alloy steels will use the following compositional limits: C-0.06 max., Mn-0.50 max., P-0.020 max. and S-0.025 max.

The Hot-Dip Galvanized and Galvannealed DDS substrate is produced from aluminum-killed steel employing special steelmaking practices. It can be produced using restricted low-carbon steels or interstitial-free steels depending on the application requirement and the producing facility. It has forming characteristics superior to CS and FS sheet. These characteristics make it excellent for applications involving deep drawing or combinations of drawing and stretching. The Hot-Dip Galvanized and Galvannealed DDS substrate will use the following compositional limits: C-0.06 max., Mn-0.50 max., P-0.020 max. and S-0.025 max.

• Weldability – Low carbon level makes this a good welding candidate.


• Fatigue Performance – Relatively low yield, compared to other steels, makes this grade more susceptible to fatigue than higher strength steels.


• Denting – Relatively low yield strength, compared to other steels, may make DDS more susceptible to denting. For additional capabilities, please check our dent-resistant steels.


• Applications – DDS is very similar to DS Type B. This material offers more formability to produce parts with a moderate depth of draw. Typical applications would include body sides, roofs, floor pans, reinforcements, doors, deck lids and hoods with difficult shapes.

Typical Properties for DDS: