sentence: Steel is used to making buildings and bridges, and all kinds of machines.
sentences_before: Today steel is made in huge buildings called 'steel mills', and is most often made by machines. It is a very cheap metal today and is used to make many things.
sentences_after: Almost all ships and cars are today made from steel. When a steel object is old, or it is broken beyond repair, it is called 'scrap'. The scrap can be melted down and re-shaped into a new object.
concept_name: steel
headings: Steel Making steel
categories: Basic English 850 words Construction Alloys