Hot-rolled H-section Steel Column

A hot-rolled H-section steel column is a vertical structural member made from steel that has been shaped into an “H” cross-section through the hot rolling process.

Hot-rolled H-sections have consistent mechanical properties, precise dimensions, and smooth surfaces, making them ideal for heavy-duty and high-rise applications.

Manufacturing Process

Hot rolling means the steel is heated above its recrystallization temperature (usually > 900°C) and passed through rollers to form the H shape.
Unlike welded H-sections, hot-rolled ones are formed directly from a single piece of steel, which gives them continuous grain structure and fewer residual stresses.

Cross-Section Shape

Flanges: The horizontal parts of the “H” — wide, thick, and parallel.
Web: The vertical part connecting the flanges.
Symmetrical in both axes, which makes it strong in bending in multiple directions.

Material Grades

Chinese Standards: Q235B, Q355B, Q355D.
American Standards: ASTM A36, ASTM A992, ASTM A572 Gr.50.
European Standards: S235JR, S275JR, S355JR.

Surface Treatment Options

Black (as-rolled) surface.
Sandblasted and primed.
Hot-dip galvanized for corrosion resistance.

Dimension Range (example for GB standard)

Web height (h): 100–1000 mm
Flange width (b): 100–400 mm
Web thickness (t1): 5–21 mm
Flange thickness (t2): 8–35 mm
Lengths up to 12–15 m (custom cutting available).

Advantages

High strength-to-weight ratio → supports heavy loads with less material.
Good torsional resistance → stable under twisting forces.
Uniform properties → consistent quality across the length.
Smooth surface finish compared to welded sections.

Common Uses

Columns in steel-framed buildings (factories, warehouses, high-rises).
Bridges and large infrastructure supports.
Marine and offshore structures.
Industrial platforms and large-span structures.

Common Standards

China: GB/T 11263 (Hot-rolled H-section steel)
Europe: EN 10034 / EN 10025
Japan: JIS G3192
US: ASTM A6 / ASTM A992