Mild steel round bar cold rolled 1215 is a type of mild steel that has been subjected to a cold rolling process to improve its mechanical properties and dimensional accuracy. Cold rolling involves passing the steel through rollers at room temperature, which can increase its strength, hardness, and surface finish. Mild steel round bar cold rolled 1215 is also known as resulfurized steel, as it contains higher sulfur content compared to regular mild steel, which can improve machinability.

Some key features and benefits of mild steel round bar cold rolled 1215 include:

1. Machinability: The higher sulfur content in mild steel round bar cold rolled 1215 provides improved machinability, making it easier to machine, drill, cut, and shape compared to regular mild steel. This makes it suitable for applications where extensive machining is required, such as in automotive, machinery, and precision parts manufacturing.
2. Dimensional Accuracy: Cold rolling process can improve the dimensional accuracy of the mild steel round bar, resulting in tighter tolerances and consistent dimensions. This can be beneficial in applications where precise dimensions are critical for proper fit, alignment, and functionality.
3. Strength and Hardness: Cold rolling can increase the strength and hardness of the mild steel round bar, providing improved mechanical properties compared to regular mild steel. This can make it suitable for applications where higher strength and hardness are required, such as in structural components, shafts, or gears.
4. Surface Finish: Cold rolling can result in a smoother and more uniform surface finish compared to hot rolled steel, which can be advantageous in applications where appearance and aesthetics are important, such as in decorative or architectural applications.
5. Versatility: Mild steel round bar cold rolled 1215 can be used in a wide range of applications, including but not limited to automotive parts, machinery components, fasteners, shafts, pins, bushings, and fittings.
6. Weldability: Mild steel round bar cold rolled 1215 is generally weldable using common welding methods such as arc welding, MIG welding, and TIG welding, making it suitable for applications where welding is required.

It’s important to note that mild steel round bar cold rolled 1215 may have lower impact resistance compared to some other types of mild steel due to its higher sulfur content. Therefore, it may not be suitable for applications where high impact loads are expected. Proper handling, storage, and surface treatment may also be necessary to prevent rusting and maintain the desired properties of the material. Consultation with qualified professionals is recommended for the proper use of mild steel round bar cold rolled 1215 in specific applications.