HEB steel is produced in three primary grades based on yield strength (fᵧ, MPa), each optimized for specific applications:
S235 (fᵧ=235 MPa):
Tensile strength: 360–510 MPa
Ductility: Elongation ≥21%
Use Case: Light - duty structures like residential partitions, small warehouses, and interior beams in low - seismic zones (e.g., single - story homes in central Europe).
S275 (fᵧ=275 MPa):
Tensile strength: 410–560 MPa
Fatigue limit: ~180 MPa
Use Case: Medium - rise buildings (5–15 stories), commercial complexes, and industrial sheds. Example: A 10 - story office building in Paris uses HEB 250 S275 for cost - efficient load support.
S355 (fᵧ=355 MPa):
Tensile strength: 490–630 MPa
Impact toughness: ≥27J at - 20°C (for S355JR)
Use Case: Heavy - duty applications like bridges, high - rises (≥20 stories), and offshore platforms. The Shard in London relies on HEB 400 S355 to withstand 120mph winds and seismic forces.
All grades meet EN 10025 - 2 standards, with S355 offering the best balance of strength, ductility, and cold - weather performance.
