Introduction
Cold formed steel usually comes in different types, such as C-shaped steel, Z-shaped steel, and U-shaped steel. The forming process of this product usually involves using a cold bending machine to produce different types of steel sections from thin plates at room temperature. Unlike hot-rolled steel formed at high temperatures, CFS is cold worked. This process can make the steel size, angle, etc. more precise. And the hardness of the products generated by this process is also higher.
Different types of steel can be applied in different scenarios, but most of them are used in large factories, buildings, transportation, and some mechanical bases. This article will mainly introduce this product, including its characteristics, manufacturing process, common types, and applications.
What is Cold-Formed Steel?
Cold formed steel is formed by stamping or bending steel plates through a cold bending forming machine, namely roll forming. These profiles are renowned for their efficient application of materials, precise dimensions, and high efficiency.
Manufacturing Process of cold formed steel
- Support the steel coil with an uncoiler.
- Place the steel coil into the feeding port of the cold bending roller machine.
- Turn on the machine, and the steel coil will be processed into suitable products through the required rolling.
- Reach the appropriate length and then proceed with cutting.
History and Development
The manufacturing of cold-formed steel began in Europe and the United States in the early 20th century. In China, the production of cold-formed steel began in the 1950s and 1960s. Nowadays, there are over 1000 production lines in China alone, with an annual output of over 15 million tons. Due to the increasing use of cold-formed steel in modern architecture and infrastructure construction, global demand continues to grow.
Key Characteristics of Cold-Formed Steel
Material Performance
Cold formed steel is commonly made of carbon steel, low-alloy steel, etc. But stainless steel or weather resistant steel can also be selected according to the application. These materials can effectively improve strength and hardness under cold processing.
Surface and Precision
The surface of cold-formed steel is relatively smooth and the thickness is uniform. The size error is small and can effectively ensure product quality.
Types and Specifications of Cold-Formed Steel
By Section Shape
- Open Sections: C-channels, Z-sections, angles, studs, and tracks.
- Closed Sections: Square tubes, rectangular tubes, and custom hollow shapes.
What is Cold-Formed Steel Used For?
Cold formed steel has the characteristics of lightweight and high strength, so it is widely used in various industries.
Common applications include:
- Architectural framework: keel, track, truss, purlin, wall panel
- Roof and floor systems: floor slabs, joists, ceiling grids
- Infrastructure: guardrails, cable trays, and storage racks
- Industrial use: automotive body parts, containers, machinery, furniture
It is capable of creating complex and sturdy cross-sections, making it particularly suitable for modern lightweight structures.
Cold-Formed vs. Hot-Rolled Steel
| Feature | Cold-Formed Steel | Hot-Rolled Steel |
|---|---|---|
| Forming Temperature | Room temperature | High temperature |
| Shape Options | Thin-walled, complex shapes | Thick, simple shapes |
| Surface Quality | Smooth, precise | Rougher finish |
| Strength | Enhanced by work hardening | Stable, ductile |
| Material Efficiency | Saves 30–50% steel | Higher steel consumption |
| Typical Uses | Framing, purlins, decking | Beams, columns, heavy structures |
Mechanical Properties of Cold-Formed Steel
Its mechanical properties are mainly related to the steel grade and thickness.
But its approximate performance values (range) are as follows:
- Yield strength 230-550 MPa
- Tensile strength 300-750 MPa
- Elongation rate 15-35%
- Thickness is usually ≤ 6 mm
- Magnetism is (iron-based)
Advantages of Cold-Formed Steel
- High strength to weight ratio – lightweight yet sturdy
- Material efficiency – steel usage reduced by up to 50%
- Design flexibility – easy to shape into customized shapes
- Quick installation – prefabricated profiles simplify construction
- Sustainability – Recyclable and environmentally friendly
If you need a machine to produce this product, please feel free to contact us. We can provide, C purlin roll forming machine, Z purlin making machine and another type of roll forming machine.