sentence: Steel has a low cost, but rusts.
sentences_before: Another part of metallurgy is making parts from metals. These parts must be made so they will not break when they are used. Metallurgists work to make the metal good when they are used. Sometimes the metal must be strong. The metallurgist must follow directions when making the part to know what metal to use.
sentences_after: Choosing a good metal is sometimes hard.
concept_name: steel
headings: Metallurgy Metal parts
categories: Technology