Cold drawn steel bars have several advantages over hot rolled steel bars:

1. Improved mechanical properties: Cold drawn steel bars have a smoother surface finish, which leads to improved mechanical properties such as higher tensile and yield strength, better surface hardness, and improved dimensional accuracy.

2. Better surface quality: Cold drawn steel bars have a smoother and more uniform surface finish, which makes them ideal for use in applications where appearance is important.

3. Cost-effective: Cold drawn steel bars are less expensive than hot rolled steel bars, making them a cost-effective option for many applications.

4. Increased durability: The cold drawing process results in a denser and more uniform grain structure, which increases the durability and fatigue resistance of the steel.