Quality	Standard	Material No.	Old designation
DD13	DIN EN 10111	1.0335	StW 24

Testing direction	Yield strength ReL (MPa) 1 ≤ 2 mm	ReL (MPa) 2 ≤ 11 mm	Tensile strength Rm (MPa)	Elongation A80 (in %) 1 ‘ 1.5 mm	A80 (in %) 1.5 ≤ 2 mm	A80 (in %) 2 ≤ 3 mm	A5 (in %) 3 ≤ 11 mm
Q	170 – 330	170 – 310	≤400	27	28	29	33

Hot-rolled steel DD13 is a non-alloy steel with a maximum tensile strength of 400 MPa and a minimum elongation of 27 %. It is characterized by its good formability and high strength. These properties make it a versatile material for a wide range of applications in various industries.

Production and properties
Hot-rolled steel DD13 is produced from slabs that are heated to a temperature of approx. 1,000 °C and then rolled to the desired shape and thickness. The rolling process gives the steel its characteristic surface finish, which can also be specified in detail.

The most important properties of hot-rolled steel DD13
Good formability: The steel is easy to bend, edge and weld, making it ideal for the production of complex components.
High strength: The steel offers high tensile strength and load-bearing capacity, making it suitable for statically stressed components.
Cost-effectiveness: Hot-rolled steel DD13 is relatively inexpensive compared to other steel grades.

Areas of application
Hot-rolled steel DD13 is used in numerous industries, including:
In the construction industry, steel is used for load-bearing elements such as beams, columns and profiles. In mechanical engineering, it is used to manufacture housings, gearboxes and other components. In vehicle construction, it is used in the production of car bodies, chassis and other components. Steel is also used in shipbuilding for the construction of hulls and other ship components, while it is used in pipeline construction for the production of pipes and lines.

The disadvantages of hot-rolled DD13 steel are:
Roughness: The surface of the steel is relatively rough.
Corrosion: The steel is susceptible to corrosion if it is not properly protected.

Summary
Hot-rolled steel DD13 is a versatile and economical material for a wide range of applications. Its good formability, high strength and cost-effectiveness make it a popular material in many industries.