Cold Rolled/Cold Rolled Closed Annealed

Cold rolled mild steel is steel that has been processed through cold rolling, resulting in a smoother surface and improved dimensional accuracy compared to hot rolled steel.

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Why CR / CRCA ?

Cold-rolling steel allows for the creation of exact shapes. Since the process is at room temperature, the steel will not shrink as it cools, as in the hot-rolled process. The exterior finish of cold-rolled steel is very desirable when aesthetics and visual appeal are a priority in your project. However, the applications of cold-rolled steel are somewhat limited to a couple of shapes – square, round, flat, and variations thereof. The properties of CR/CRCA are:

1. Smooth Surface Finish: Cold rolling produces a smoother and more refined surface than hot rolled steel, making it suitable for applications where appearance is important, such as in exposed architectural elements.

2. Dimensional Accuracy: Cold rolling ensures tight dimensional tolerances, making cold-rolled mild steel well-suited for parts and components that require precise measurements.

3. Increased Strength: The cold rolling process can enhance the mechanical properties of mild steel, leading to increased strength and hardness.

4. Uniformity: Cold rolling results in a uniform thickness across the entire sheet or coil, providing consistent material properties throughout the product.

5. Good Weldability: Cold-rolled mild steel typically retains good weldability, allowing easy joining and fabrication.

However, cold rolled closed annealed (CRCA) steel undergoes cold rolling and annealing treatment, providing enhanced formability and workability. CRCA steel is commonly used in applications requiring complex forming or bending, such as automotive manufacturing of various components.