ArcelorMittal offers a wide range of heavy plates. The steels listed here are mainly used in construction and civil engineering:
High yield strength steels for cold forming - thermomechanical steels
These steels are low alloy, fine grain grades. They have low carbon content and are enriched where required with niobium, titanium and/or vanadium and are commonly referred to as high strength low alloy steels (HSLA). Since their carbon equivalent value is low, these steels have improved weldability. Low sulphur content, high internal purity and a fine grain structure guarantee excellent ductility, toughness and fatigue resistance.
Standard: EN 10149-2
S315MC, S355MC, S420MC, S460MC
Applications: High strength low alloy steels are mainly used in the construction of bridges, containers, pylons and other architectural structures.
These carbon-manganese steels with a guaranteed minimum yield strength and tensile strength have a satisfactory ductility and toughness.
The J0, JR, J2 and K2 grades have different guaranteed toughness KV2 (Charpy impact strength). The addition of the suffix "+N" to the grade reference means that the properties are also guaranteed after a normalisation heat treatment. Conventional welding processes may be used.
Standard: EN 10025-2
S235JR/S235J0/S235J2+N/S235J2, S275JR/S275J0/S275J2+N/S275J2, S355JR/S355J0/S355J2+N/S355J2/S355K2+N/S355K2, S185, E295, E335, E360
Application: Structural steels are used primarily in building applications and mechanical engineering.
Weldable fine grain structural steels - thermomechanical rolled steels
Weldable fine grain structural steels are thermomechanically rolled, which gives improved welding performance compared with equivalent normalised steels.
Standard: EN 10025-4
S275M/S275ML, S355M/S355ML, S420M/S420ML, S460M/S460ML
Applications: mainly used for welded parts that have to withstand high levels of strain like bridges, pylons and other architectural structures.
Weldable fine grain structural steels - normalised or normalised rolled steels
Weldable fine grain structural steels are either normalised or obtained by normalising rolling and thus keep their mechanical properties if the welded parts are normalised.
Standard: EN 10025-3
S275N/S275NL, S355N/S355NL,S420N/S420NL, S460N/S460NL
Applications: These grades are used for welded parts that have to withstand high levels of strain, as in a windmill, for example.
Weldable structural steels for fixed offshore structures
This range is under development and is based on thermomechanically rolled (M) or normalised (N) steels studied to improve workability and weldability.
Standard: EN 10225
S355G2+N, S355G3+N, S355G5+M, S355G6+M, S355G7+N, S355G7+M, S355G8+N, S355G8+M, S355G9+N, S355G9+M, S355G10+N, S355G10+M
Applications: These grades are used for structures in offshore windmills and platforms
Heavy Plates: General Information
The following documents present the whole heavy plate product range of the ArcelorMittal mills in Gijón (Spain) and Galati (Romania):
Several steel grades produced at ArcelorMittal Gijón were certified by the French institution AFNOR Certification and are included in the AF Acier list of certified products: