Businesses in the basic iron and steel category produce metal in its primary forms, using iron ore, scrap metal and other raw materials. Processes may include smelting, refining, steelmaking and casting, followed by rolling or other forming methods. Products can include pig iron, crude steel, billets, blooms, slabs, coils, plates, sheets, bars, rods, rails and structural sections. Some producers also make ferro-alloys, which are added to steel to influence its properties. These materials are supplied mainly to manufacturers and construction businesses for further processing or use in finished goods. Customers may use them to make machinery, vehicles, appliances, pipes, tools, building frameworks and infrastructure components. Depending on the business, services may include cutting, shaping, heat treatment or producing grades and dimensions to a customer's specification.