Angle Bar

Angle is one of the steel sections widely used in the building industry and metal structures that is produced in the form of two perpendicular sides.
This product, because of its high strength, resistance to pressure, and easy connection to other metal parts, is considered one of the main components of steel frames and industrial infrastructures.

Angles have a simple appearance but play a very vital role in the strength of structures and transferring lateral and vertical loads.
From huge metal structures to light equipment and even household tools — all of them use this widely used profile.

Structure and shape of angle

An angle consists of two perpendicular flanges, whose thickness, length, and angle are determined based on different standards.
This section is usually known in the form of the English letter L, and for this reason, in global markets, it is called Angle.

In general, angles are divided into two main types:

1. Equal-leg angle
   In this type, the length of both flanges is equal.
   For example, 50×50 angle means both flanges are 50 millimeters.
   Equal-leg angles are mostly used in structure frames, trusses, columns, and metal frames.

2. Unequal-leg angle
   In this type, one of the flanges is shorter than the other, for example 50×30.
   This model is used more in projects that need connection in special corners or structures with limited space.

Production methods of angle

Production of angle is done in two main methods, each with its own features:

🔹 1. Hot rolled angle
In this method, a steel billet is heated at a high temperature and then passed through rollers until it reaches the final shape.
The hot rolled angle has a rough and resistant surface and is very suitable for heavy structures.

🔹 2. Cold rolled angle
In this method, a steel sheet after hot rolling and at room temperature is bent and shaped.
The surface of cold rolled angle is smoother and shinier and is used mostly in fine or light industrial projects.

Technical specifications of angle

Angles are produced according to global standards such as DIN EN 10056 or ISIRI 13968 of Iran.
The important parameters in choosing an angle are:

• Flange dimensions: from 20 to 200 mm

• Thickness: between 3 to 20 mm

• Length of bars: usually 6 or 12 meters

• Type of steel: usually ST37, ST44, or ST52 based on required strength

Applications of angle

Angle is used in various construction, industrial, and civil projects.
Some of the most important applications are:

• Building steel structures

• Strengthening connections in columns and beams

• Making prefabricated structures and sheds

• Manufacturing metal shelves and frames

• Use in bridges, towers, and masts

• Making stairs, fences, and metal window frames

• Building frames of industrial equipment

Advantages of using angle

1. High strength: because of its angular structure, it has excellent resistance against bending and compression forces.

2. Easy installation: easily connectable by welding or bolts and nuts.

3. Reasonable price: more economical compared to other steel sections.

4. Long durability: with proper coating, it has high resistance to corrosion and rust.

5. Applicable in light and heavy structures: used from industrial projects to household purposes.

Types of angle by material and structure

Besides production type, angles are also classified based on material:

• Steel angle: the most common type, strong and suitable for heavy structures.

• Aluminum angle: light, rustproof, suitable for decorative projects.

• Stainless steel angle: corrosion-resistant, used in food and chemical industries.

• Galvanized angle: zinc-coated, useful for humid environments.

Factors affecting the price of angle

The price of angle is affected by several factors, including:

• Material and type of steel used

• Dimensions and thickness

• Production method (hot or cold)

• Market fluctuations of steel and currency

• Brand and manufacturer

Important points when buying angle

When buying angle, the following points should be considered:

• Check standard and quality certificate of the product

• Choose thickness and dimensions suitable for the project

• Ensure the surface flatness and angle uniformity

• Buy from trusted sellers to avoid counterfeit steel

Conclusion

Angle is one of the most important steel profiles in construction and metal structures, and because of its strength, durability, and reasonable cost, it has a special place among steel products.
Choosing the right type and thickness of angle has a direct effect on safety, durability, and final cost of the project.
Therefore, it is recommended to carefully evaluate the type of application and load before purchase to select the best option.

Frequently Asked Questions about Angle