Quality	Material No.	Standard	Further designation	Product information
DD11	1.0332	DIN EN 10111	StW 22	Details
DD12	1.0398	DIN EN 10111	StW 23	Details
DD13	1.0335	DIN EN 10111	StW 24	Details
DD14	1.0389	DIN EN 10111	StW 24 W	Details

Our product portfolio starts with the first and simplest steel in terms of manufacturing processes, hot-rolled mild steels. This includes the grades DD11, DD12, DD13 and DD14. The designation system for steels can be found in EN 10027-1. Here, steels are abbreviated and then the first D in DDxx stands for flat product for cold forming. The second D, followed by two digits, defines that it is hot-rolled steel. Steels of this type are characterized by their excellent formability. They can be used for deep drawing processes and bending. The mechanical properties of the individual soft steel grades are characterized by the level of yield strength and tensile strength as well as guaranteed minimum values of elongation at break. The properties of this steel make it the ideal material for the further processing of numerous end products such as stamped, pressed and drawn parts, pipes, car wheels, agricultural equipment and shelving systems.

Hot-rolled steel can be supplied in the rolled state. This means that the surface has a thin, adherent layer of scale with different colors. Colloquially, this delivery condition is called black or rolled blue. Usually, however, a descaled or stained and oiled surface is supplied. In this case, both sides are given a protective layer of oil, which is chemically neutral, non-drying and free from foreign bodies. The oil layer can be removed with alkaline solutions or other common solvents.

The surface quality must be free of overlaps, bubbles, peeling, cracks and scratches, as these can impair usability. Pores, slight scars, slight marks, slight scratches, discoloration and creases from reeling are permissible.

Details on the mechanical and chemical values of the hot-rolled steels can be found in the table above (click on Details).

You can also download the complete extract from our Quality Guide (QG) for grades DD11, DD12, DD13 and DD14 via the link below.

DIN EN 10111 replaces the previous editions DIN 1614-1 and DIN 1614-2 and was developed to adapt the requirements of today’s soft steels to the current state of the art.