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QualityMaterial-No.StandardOlder Designations
S235JR1.0038DIN EN 10025-2S235JRG2, RSt37-2Details
S235J01.0114DIN EN 10025-2St37-3UDetails
S235J21.0117DIN EN 10025-2S235J2G3, S235J2G4Details
S275JR1.0044DIN EN 10025-2St44-2Details
S275J01.0143DIN EN 10025-2St44-3UDetails
S275J21.0145DIN EN 10025-2Details
S355JR1.0045DIN EN 10025-2Details
S355J01.0553DIN EN 10025-2St52-3UDetails
S355J21.0577DIN EN 10025-2S355J2G3, St52-3NDetails
S355K21.0596DIN EN 10025-2S355K2G3Details
S460JR1.0507DIN EN 10025-2St55Details
S460J01.0538DIN EN 10025-2Details
S460J21.0552DIN EN 10025-2GS-52Details
S460K21.0581DIN EN 10025-2Details
S500J01.0502DIN EN 10025-2Details

Hot-rolled structural steels according to DIN EN 10025-2

Hot-rolled structural steels in accordance with the DIN EN 10025-2 standard are versatile steels that are used in a wide range of building and construction applications. These steels are characterized by their high strength, good formability and excellent weldability. They are offered in various delivery states and under specific rolling processes, which influence the mechanical properties of the material depending on the requirements.

Delivery conditions and rolling processes

The DIN EN 10025-2 standard specifies three main delivery conditions for hot-rolled structural steels:

+N (normalized or normalizing rolled): In this condition, the steel is normalized during or after rolling, which means that the structure of the steel is homogenized through controlled heating and subsequent slow cooling. This leads to an even distribution of mechanical properties and ensures high strength and toughness of the material.
+AR (as rolled): Steels in this condition are supplied without further heat treatment, i.e. “as rolled”. They are more cost-effective as no additional heat treatment is required, but generally offer lower mechanical properties than normalized steels.
+M (thermomechanically rolled): In this process, the steel is thermomechanically treated during the rolling process to increase strength while ensuring good weldability and toughness. Thermomechanically rolled steels offer an excellent combination of high strength and good workability.

Weldability and formability
Structural steels in accordance with DIN EN 10025-2 are easy to weld due to their chemical composition and mechanical properties. This makes them ideal for use in load-bearing structures where high weld seam strength is required. The steels are also characterized by their excellent formability, which means that they can be easily formed into different shapes without losing their strength and toughness.

Cold formability and hot forming
Hot-rolled structural steels can be formed both cold and hot. Cold formability is particularly important in the manufacture of components that require precise and tight tolerances, such as for bending or roll forming. These steels are also suitable for flame straightening, which is necessary when correcting deformations or adjusting components. At higher temperatures, hot forming enables simple and effective machining of larger workpieces.

Hot-dip galvanizing and surface finish
Another important feature of structural steels in accordance with DIN EN 10025-2 is their suitability for hot-dip galvanizing. This galvanizing protects the steel against corrosion and extends its service life, which is particularly advantageous in outdoor applications. The surface finish varies depending on the product form (strip, sheet or wide flat steel) and influences the choice of steel depending on the end application.

In summary, hot-rolled structural steels in accordance with DIN EN 10025-2 offer a high degree of flexibility for use in a wide range of applications where weldability, formability and corrosion protection are required. They are available in various delivery states that are specifically tailored to the mechanical requirements and processing methods.

Quality Guide Download: Hot rolled structural steel

Behind this download you will find our ESB Quality Guide (data sheet) for hot-rolled structural steel.

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Maik Gretz

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Maik Gretz
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