H section steel specifications

H section steel is an economical structural profile featuring an optimized cross-sectional area and a favorable strength-to-weight ratio. It derives its name from the "H"-shaped cross-section. The inner sides of the flanges (the two horizontal parts of the "H") are straight and without taper, which simplifies welding and assembly processes, improves construction quality, and enhances structural safety.

Union Steel Industry Co., Ltd is professional H-section steel manufacturer, for more details, please contact:sales@union-steels.com

Representation of H Section Steel Specifications

The specifications of H section steel are typically represented in the format: height (h) × width (b) × web thickness (tw) × flange thickness (tf).
For example: H100×100×6×8 means:

Height = 100 mm

Width = 100 mm

Web thickness = 6 mm

Flange thickness = 8 mm

Types and Classifications of H Section Steel

H section steel comes in various types, generally classified into ordinary and lightweight categories based on proportions:

Ordinary H sections: flange thickness to web thickness ratio is greater than 2.5

Light H sections: flange thickness to web thickness ratio is less than or equal to 2.5

Different national and international standards may have further subdivisions based on usage and dimensional precision.

How to Select H Section Steel

When selecting H section steel, you should base your decision on structural load requirements and design considerations. Key selection parameters include:

Height (h): Typically determined by span and load-bearing requirements.

Width (b): Based on the beam’s stress distribution and integration with other components.

Thickness (tw/tf): Must correspond to the expected load conditions and the material strength grade.

Common H Section Steel Sizes

Below are some widely used H section steel sizes:

H100×100×6×8

H125×125×8×10

H150×150×10×12

H175×175×12×14

H200×200×14×16

H225×225×16×18

H250×250×18×20

H275×275×20×22

H300×300×22×24

H325×325×24×26

H350×350×26×28

H375×375×28×30

H400×400×30×32

Main Applications of H Section Steel

Construction Engineering:
Used in structural components like roof trusses, crane girders, and columns in industrial buildings. In high-rise structures, H sections often serve as frame columns and beams.

Bridge Engineering:
Essential in large-span bridges, especially for main beams and piers. Also common in pedestrian bridges due to their balance of strength and visual appeal.

Mechanical Manufacturing:
Applied in the frameworks of machinery such as cranes, conveyors, and machine tools. In vehicle production (e.g., trains, trucks), H section steel can be used for chassis and structural frames.

Other Fields:

Power Transmission: Used in transmission towers to support conductors and resist wind loads.

Mining Engineering: Functions as support in mine tunnels to prevent cave-ins and enhance operational safety.