Carbon steel square bars are solid metal bars with a square cross-section, primarily made of carbon steel. They are widely used in various industrial applications due to their excellent strength, hardness, and machinability. Here are some key points about carbon steel square bars:

Composition: Carbon steel square bars are typically made from carbon steel, an alloy of iron and carbon, with carbon being the principal alloying element. The carbon content can vary depending on the grade and specific requirements. Common grades include low carbon steel (e.g., AISI 1018), medium carbon steel (e.g., AISI 1045), and high carbon steel (e.g., AISI 1095). Other alloying elements such as manganese, sulfur, phosphorus, and silicon may also be present in small amounts.

Manufacturing: Carbon steel square bars are typically produced through hot rolling or cold drawing processes. Hot rolling involves heating the steel billet to high temperatures and passing it through rollers to form the desired shape. Cold drawing, on the other hand, involves pulling the steel through a die to achieve the desired dimensions and surface finish.

Sizes and Dimensions: Carbon steel square bars are available in various sizes and dimensions to suit different applications. The square cross-sections can range from small sizes (e.g., 1/4 inch) to larger sizes (e.g., several inches), with standard lengths typically ranging from 12 to 20 feet. The surface of the bars can be either smooth or with a textured finish, depending on the manufacturing process and requirements.

Applications: Carbon steel square bars find applications in a wide range of industries, including construction, manufacturing, automotive, machinery, and engineering. They are commonly used to manufacture shafts, axles, gears, keys, fasteners, and other components requiring high strength and durability.

Properties: Carbon steel square bars exhibit excellent mechanical properties, including high tensile strength, hardness, and wear resistance. They can be easily machined, welded, and heat treated to achieve desired properties such as increased hardness or improved ductility.

Finishes: Carbon steel square bars are available in various surface finishes to meet specific application requirements. Common finishes include black (as-rolled), pickled and oiled, cold drawn, turned, and polished.