Hypo-eutectoid steel is a type of steel that is characterized by having less than the eutectoid percentage of carbon. Some common synonyms for hypo-eutectoid steel include low carbon steel, mild steel, and low alloy steel. This type of steel is widely used in many industries such as construction, automotive, and manufacturing. Its properties include high ductility, excellent weldability, and good machinability. Hypo-eutectoid steel is commonly used for making metal structures, bolts, screws, and many other items where low strength, low weight, and low cost are required. Overall, hypo-eutectoid steel is an important material in modern engineering and plays a vital role in many aspects of our daily lives.