What are the three groups of metals?
Ferrous
Non ferrous
Alloys
What is the naturally-occurring form of metals called?
Metal ore
What are 7 different types of iron?
Pig iron
Cast iron
Acid iron
Basic iron
Wrought iron
Ingot iron
Steel
What are pig, cast, acid and basic iron?
Pig iron = impure product of a blast furnace
Cast iron = grades of pig iron re-melted and cast into shapes
Acid iron = Low phosphorous pig iron
Basic iron = iron containing up to 2% phosphorous
What are wrought, ingot iron and steel?
Wrought iron = refined iron containing slag (molten metal)
Ingot iron = purest commercial form of iron
Steel = an alloy of iron with 1-5% carbon