MS Square Bar, also known as Mild Steel Square Bar, is a type of metal bar with a square cross-section. It's made from mild steel, a low-carbon steel alloy known for its affordability, good weldability, and machinability. It is a useful option for fabrication because of how simple it is to weld, cut, bend, and shape. Strong tensile performance is provided for various structural applications. It is used in a wide range of construction applications, such as industrial components, shafts, axles, gears, machine parts, and structural elements. Concrete reinforcing bars also use it. It is used in typical metalworking operations such as cutting, welding, shaping, and bending.