Mild steel square bar that is hot rolled is a type of steel bar that is produced through the hot rolling process. Hot rolling involves heating the steel to high temperatures and then passing it through rollers to shape it into a square bar form. Hot rolled mild steel square bars are commonly used in various applications, including manufacturing, construction, automotive, general fabrication, and DIY projects.

Some key features of mild steel square bars made from hot rolled steel include:

1. High Strength: Hot rolled mild steel square bars have good strength properties, making them suitable for various structural and mechanical applications.
2. Ductility: Mild steel square bars made from hot rolled steel have good ductility, allowing for easy bending, forming, and shaping to meet specific design requirements.
3. Versatility: Hot rolled mild steel square bars can be used in a wide range of applications, such as in machinery, equipment, frames, brackets, and more.
4. Cost-effective: Hot rolled mild steel square bars are generally more cost-effective compared to other higher alloy steels, making them a practical choice for many applications.
5. Weldability: Mild steel square bars made from hot rolled steel have good weldability properties, allowing for easy welding using common welding methods, such as MIG, TIG, or stick welding.
6. Machinability: Hot rolled mild steel square bars have good machinability, making them easy to machine into desired shapes and sizes for different applications.
7. Availability: Mild steel square bars made from hot rolled steel are readily available in various sizes and lengths, making them convenient for use in different projects.

It’s important to note that proper engineering and design considerations, including load calculations and local building codes, should be taken into account when specifying and using mild steel square bars for specific applications to ensure the safety and performance of the overall structure. Additionally, depending on the application and environmental conditions, surface treatment or coating may be required to provide additional corrosion resistance.