Quality | Material-No. | Standard | |
---|---|---|---|
S460Q | 1.8908 | DIN EN 10025-6 | Details |
S460QL | 1.8906 | DIN EN 10025-6 | Details |
S460QL1 | 1.8916 | DIN EN 10025-6 | Details |
S500Q | 1.8924 | DIN EN 10025-6 | Details |
S500QL | 1.8909 | DIN EN 10025-6 | Details |
S500QL1 | 1.8984 | DIN EN 10025-6 | Details |
S550Q | 1.8904 | DIN EN 10025-6 | Details |
S550QL | 1.8926 | DIN EN 10025-6 | Details |
S550QL1 | 1.8986 | DIN EN 10025-6 | Details |
S620Q | 1.8914 | DIN EN 10025-6 | Details |
S620QL | 1.8927 | DIN EN 10025-6 | Details |
S620QL1 | 1.8987 | DIN EN 10025-6 | Details |
S690Q | 1.8931 | DIN EN 10025-6 | Details |
S690QL | 1.8928 | DIN EN 10025-6 | Details |
S690QL1 | 1.8988 | DIN EN 10025-6 | Details |
S890Q | 1.8940 | DIN EN 10025-6 | Details |
S890QL | 1.8983 | DIN EN 10025-6 | Details |
S890QL1 | 1.8925 | DIN EN 10025-6 | Details |
S960Q | 1.8941 | DIN EN 10025-6 | Details |
S960QL | 1.8933 | DIN EN 10025-6 | Details |
Hot-rolled structural steels with higher yield strength in the quenched and tempered condition according to DIN EN 10025-6
DIN EN 10025-6 specifies the requirements for hot-rolled structural steels with higher yield strength in the quenched and tempered condition, primarily used in demanding construction applications. These steels are characterized by high strength and toughness, offering optimal mechanical properties through quenching and tempering, which are essential for highly stressed structural components. Quenched and tempered steels are known for their increased yield strength, enhancing their load-bearing capacity and ensuring shape stability even under significant stress. This makes them ideal for applications requiring high resistance to external influences, such as in heavy industry, offshore applications, or large infrastructure projects.
Quality Groups and Impact Toughness
An important aspect when selecting structural steels according to DIN EN 10025-6 is their suitability for specific climatic conditions and mechanical stresses. This is regulated by classification into quality groups, which are distinguished by different minimum requirements for impact toughness at defined temperatures.
Impact toughness indicates how much energy a material can absorb before fracturing. This is especially crucial in cold climates, as many materials become more brittle and prone to fracture at low temperatures.
Application and Properties
Hot-rolled structural steels with higher yield strength in the quenched and tempered condition offer excellent strength, achieved through a very fine-grained microstructure. These steels are characterized by their high weldability and machinability and, despite their high strength, can be processed well. This makes them highly versatile for use in demanding applications.
Applications for these steels can be found in heavy industry, such as the manufacturing of components for cranes, bridges, or highly stressed steel structures. They are also frequently used in the offshore industry, where both high strength and exceptional toughness are required to withstand the extreme conditions at sea.
The classification into quality groups and the associated determination of impact toughness according to DIN EN 10025-6 ensures that the structural steels meet the specific requirements of the respective application conditions, thus guaranteeing a long service life and high safety.

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Alex Bachmann
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