Quality	Standard	Material No.	Old designation
DD11	DIN EN 10111	1.0332	StW 22

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 – 360	170 – 340	≤440	22	23	24	28

Hot-rolled steel DD11 is a non-alloy steel characterized by its excellent formability and good weldability. It is produced in accordance with the EN 10111 standard and is a mild steel with a minimum tensile strength of 340 MPa. These properties make it particularly suitable for applications in various industrial sectors such as automotive engineering, construction and mechanical engineering.

Production and properties:
DD11 is rolled from slabs that are heated to temperatures of over 1000 °C. Rolling gives the steel its final shape and properties. DD11 has a ferritic-pearlitic microstructure, which gives it its good formability and toughness.

Applications:
DD11 is used in a variety of applications due to its properties, such as:
– Automotive industry: body parts, wheels, chassis components
– Construction industry: Load-bearing structures, profiles, pipes
– Household appliances: housings, sheet metal
– Mechanical engineering: transmission parts, housings, shafts
– Agricultural equipment: plows, trailers, tractors

Advantages:
– Good formability: DD11 can be easily formed into various shapes, making it ideal for cold forming.
– Good weldability: DD11 can be welded using all common welding processes without preheating.
– Toughness: DD11 is a tough material that can withstand high loads.
– Inexpensive: DD11 is a relatively inexpensive material.

Disadvantages:
– Lower strength: DD11 has a lower strength than quenched and tempered or alloyed steels.

Surface treatment:
DD11 can be coated using various methods to protect against corrosion, such as:
– Galvanizing: Galvanizing protects the steel from corrosion by applying a layer of zinc.
– Painting: Painting allows the steel to be coated in different colors and protected from corrosion at the same time.
– Cathodic dip coating: Plastic coatings offer good corrosion protection and are abrasion-resistant at the same time.

Summary:
Hot-rolled steel DD11 is a versatile material that is characterized by its good formability, weldability and toughness. It is used in a wide range of applications and is a popular material for cold forming due to its positive properties.