High Quality 250x250x9x14 350x175x7x11 S355NL H Shaped Profile

S355NL h beam structure is a low-alloy high-strength steel under the European standard EN10025-3. It is delivered by normalizing rolling and has both high strength (yield strength ≥355MPa) and low-temperature toughness (-50℃ impact energy ≥40J).

Chemical composition of S355NL steel beam h
Typical composition: C≤0.18-0.22%, Mn≤1.60%, containing trace amounts of alloying elements such as Nb and V, and low sulfur and phosphorus content (S≤0.025%, P≤0.025%) to improve weldability and resistance to lamellar tearing.

Cross-section dimensions: height 250mm×width 250mm, web thickness 9mm, flange thickness 14mm.
Theoretical weight: about 71.8kg/m, density 7.85g/cm³.
Mechanical properties: tensile strength 470-630MPa, yield strength ≥345MPa (thickness ≤16mm).
Special treatment: Z-direction performance (Z15/Z25/Z35), flaw detection and shot blasting painting process can be added.

Section size: height 350mm×width 175mm, web thickness 7mm, flange thickness 11mm.
Theoretical weight: about 49.4kg/m.
Mechanical properties: tensile strength ≥470MPa, yield strength ≥335MPa (thickness 40-63mm).
Application characteristics: suitable for scenes requiring high stability such as building frames and bridge supports.

High strength and ductility: tensile strength of 630MPa, elongation at break of 21-22%, with both load-bearing capacity and deformation resistance.
Low-temperature toughness: passed the -50℃ impact test, suitable for cold areas and low-temperature working conditions.
Processing adaptability: supports welding, cutting, heat treatment, and can customize Z-direction tear resistance (such as Z25/Z35).

Construction engineering: high-rise building frames, factory steel structures.
Bridges and transportation: long-span bridges, heavy-load vehicle chassis.
Heavy machinery: mining equipment, lifting machinery support structure.
Energy field: wind power towers, oil storage tanks.