Creep-resistant steels

Technical data sheets for creep-resistant steels

Definition and applications

Creep-resistant steels are a particular category of structural steels. They are designed to withstand deformation under a constant load at high temperatures (from 350°c to 700°c)
These steels are used for the construction of valves, flanges, tie rods, pipes, plates, etc. Thanks to their particular mechanical characteristics, these steels also find their application in the chemicaland petrochemical industries, in thermal and nuclear power plants, conveyors of superheated steam at high temperatures, and rotors and pipes that transport hot fluids under pressure. The specific applications of these steels require a high degree of weldability and are therefore all low-carbon steels (max. 0.20%).


Creep resistance steels are used to produce parts which are subjected to the phenomenon of creeping, which is a result of the combination of heat-stress-time. Steels in this group can be supplied as standardized, annealed, annealed state machinable, tempered and quenched. To prevent the mechanical characteristics from degrading rapidly during use, the tempering temperature must therefore be at least 50°C higher than the maximum operating temperature.


Product range

Purchasing a Siderurgica Lombarda product means that you can count on a complete package of services.

Steel qualityStandardProcessing routesSupply statusRounds (mm)Squares (mm)Flats (mm)Steel blooms (mm)
B16ASTM A193RolledHardened and tempered30-130   
F5/F9/F11/F12/F22ASTM A182RolledNatural80-320  200-400

*Steel booms: supply status “natural”