Authentic Steel specializes in manufacturing and exporting prime structural steel coils and heavy cut-to-length steel plates conforming to international building and engineering standards, including EN 10025-2 S235JR / S355JR / S355J2, ASTM A36 / A572 Grade 50, and JIS G3106 SM490. Hot rolled under precise thermomechanical control (TMCP) or normalized rolling regimes, these structural steel products deliver exceptional load-bearing capacity, uniform yield strength, and robust low-temperature impact toughness.
High-strength structural steel coils and plates are the primary engineering foundation for modern high-rise architecture, heavy bridge construction, offshore energy platforms, and heavy equipment manufacturing. Engineered with strict control over carbon equivalents (CEV) and internal grain purity, S355 and A36 structural steels support severe weld fatigue resistance, flame cutting precision, and complex structural bending without internal delamination.
International Structural Grades: European EN 10025-2 (S235JR, S235J2, S355JR, S355J2, S355K2); American ASTM (A36, A572 Grade 42/50, A709); Japanese JIS G3106 (SM400A/B/C, SM490A/B/C); Chinese GB/T 1591 (Q355B, Q355C, Q355D, Q355E)
Thickness Dimension Spectrum: Coils from 1.50 mm to 20.00 mm; Cut Plates / Heavy Medium Plates up to 150.00 mm
Available Width Capabilities: 1219 mm, 1500 mm, 1800 mm, 2000 mm, 2200 mm, 2500 mm, or custom leveled rectangular plates
Delivery Heat-Treatment Conditions: As-Rolled (AR), Thermomechanically Rolled (M / TMCP), Normalized (N), or Normalized Rolled (NR)
Applicable Construction Standards: EN 10025-2, ASTM A36 / A572, JIS G3106, GB/T 1591, ISO 630
High-Rise Building Frames & Commercial Complexes: Fabricated into heavy welded H-beams, box columns, core wall embedded steel plates, and floor truss support structures.
Bridge Engineering & Highway Infrastructure: Formed into long-span bridge girders, highway overpass box beams, railway bridge decks, and structural expansion joint plates.
Offshore Energy & Heavy Industrial Structures: Applied in wind turbine tower flanges, offshore oil platform jacket legs, mining excavator frames, and heavy gantry crane booms.
Heavy Machinery & Pressure Vessel Base Plates: Utilized for heavy industrial press beds, gear box housings, earthmoving bucket wear bases, and crane counterweight mounting plates.
Guaranteed Low-Temperature Impact Performance: S355J2 and Q355D grades undergo rigorous Charpy V-notch impact testing to ensure total structural reliability against brittle fracture in freezing climatic conditions.
High Weldability & Low Carbon Equivalent: Controlled chemical formulation ensures low CEV, minimizing pre-heating requirements during heavy multi-pass arc welding.
Seaworthy Export Protection & Mill Test Certification: Shipped with full EN 10204 3.1 Mill Test Certificates (MTC) detailing heat analysis, mechanical yield/tensile values, and ultrasonic flaw detection (UT) grade compliance.
