A steel bar is a long, solid piece of metal made primarily from iron and carbon. It is commonly used in construction and manufacturing due to its strength and durability. Steel bars come in various shapes, including round, square, and rectangular, and can be produced in different sizes to meet specific needs. These bars are often used as structural components in buildings, bridges, and other infrastructure projects. They can also be found in machinery and tools, where their toughness is essential. The production of steel bars typically involves processes like casting, rolling, and forging to achieve the desired properties.