In the 21st century, finding and using advanced steel has become increasingly important to meet the demands of various industries. Among them, I-shaped steel beam stands out as a symbol of excellent progress in the field of building materials.
Overview of I-shaped steel beams
I-shaped steel beam is a type of carbon steel with a cross-section similar to the capital letter "I", with two flanges narrower than the connecting part in the middle.
This steel product has the ability to bear high loads and forces, with high stability and robust impact resistance. When galvanized on the surface,I-type steel has even higher strength, making it suitable for outdoor construction projects, especially in areas with harsh weather conditions, high humidity, large temperature differences, or acidic environments.
Chemical Composition of I-shaped steel beams
Steel Grade | Chemical Composition (%) |
C Max | Si Max | Mn Max | P Max | S Max |
SM490A | 0.20 – 0.22 | 0.55 | 1.65 | 35 | 35 |
SM490B | 0.18 – 0.20 | 0.55 | 1.65 | 35 | 35 |
A36 | 0.27 | 0.15 – 0.40 | 1.20 | 40 | 50 |
SS400 |
|
|
| 50 | 50 |
I-type steel mechanical properties
| Steel Grade |
| Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|
| SM490A |
| ≥325 | 490-610 | 23 |
| SM490B |
| ≥325 | 490-610 | 23 |
| A36 |
| ≥245 | 400-550 | 20 |
| SS400 |
| ≥245 | 400-510 | 21 |
Applications of I-shaped Steel Beams
I-shaped steel beam plays a crucial role in various fields and has a wide range of applications.
In the construction and civil engineering industry, I-shaped steel beam is commonly used to construct beams, columns, girders, and foundations for factories, high-rise buildings, prefabricated houses, bridge structures, and other construction projects.
In the mechanical and manufacturing fields, this type of steel is typically used for making bridges for lifting machinery, steel antenna elements, power transmission towers, truck frames, and various other industrial applications.
In the shipbuilding industry, I-shaped steel beam is often used to construct hulls, ship frames, drilling platforms, and other essential structures in the production and assembly of ships.
I-shaped steel beam plays an important role in various fields of life and has extensive applications.
Types of I-shaped Steel Beam
Currently, there are three main types of I-shaped steel beam:
Cast I-shaped Steel Beam
Produced using advanced casting techniques and meets international standards. Cast I-shaped steel beam has high hardness, strength, and good load-bearing capacity. This product is cost-effective and widely used. However, prolonged exposure to acidic or salty environments may lead to oxidation, corrosion, and rusting.
Galvanized I-shaped Steel Beam
This involves externally galvanizing cast I-shaped steel beam to protect the internal steel layer. The zinc layer minimizes the oxidation process, protecting the steel from adverse environmental effects. Additionally, the zinc layer increases surface hardness. Compared to similar cast I-shaped steel beam, galvanized I-shaped steel beam is usually more expensive.
Hot-Dip Galvanized I-shaped Steel Beam
This process involves surface treatment of cast I-shaped steel beam in a hot-dip galvanizing bath. The zinc layer forms multiple alloy layers with high adhesion, providing excellent corrosion and oxidation resistance. I-shaped steel beam has a smooth surface, enhancing appearance and durability, and is typically the most expensive among the three types.
