Classification of materials

Question 1

What are the 7 classifications for materials?

Answer 1

(1) Metals
(2) woods
(3) polymers
(4) papers and boards
(5) composites
(6) smart materials
(7) modern materials

Question 2

What are ferrous metals? Give examples

Answer 2

• A metal containing mostly iron and carbon. Ferrous metals are magnetic and will rust
• Low carbon steel, medium carbon steel, cast iron

Question 3

What are non-ferrous metals? Give examples

Answer 3

• A metal that does not contain iron. Non-ferrous metals are not magnetic and do not rust
• Aluminium, copper, zinc, silver, gold, titanium, tin

Question 4

What is an alloy? Give examples

Answer 4

• A metal made of two or more metals, combining two or more elements (one of which must be a metal)
• Non-ferrous alloys: bronze, brass, duralumin, pewter
• Ferrous alloys: stainless steel, die steel (tool steel)

Question 5

What is a hardwood? Give examples