Lesson materials for metals

1. Lesson Metals
ONLINE LESSONS

2. Metals can be divided into two main groups.
Ferrous metals
Non ferrous metals
Ferrous metals contain iron
Non ferrous metals do bot contain iron.
Why are ferrous metals attracted to magnets?

3. Examples of ferrous metals:
Mild steel, high carbon steel, stainless steel, cast iron.
Examples of non ferrous metals:
Copper, Aluminium, Zinc, Brass

4. Mild steel.
Carbon content ~ 0.10 %
Has a very high strength compared to most non ferrous metals.
Rusts when exposed to weather.
Is ductile.
Products made from mild steel: construction bars, table, chair frame, nails,
screws, bolts.

5. Products made from mild steel.
Square bars Hand rails Nails

6. High carbon steel
Is a hard material.
Good resistance to wearing.
Less ductile than mild steel.
Products made from high carbon steel: knives, files, drill bits, chisels
Carbon content ~ 0.55 %

7. Products made from high carbon steel.
Files Chisels Drill bits

8. Stainless steel
Contains 10~30% Chromium
Good resistance to corrosion.
High strength.
Durability
Products made from stainless steel: cutlery, kitchen sinks, surgical equipments

9. Products made from stainless steel.
Cutlery Surgical equipment Sink

10. Cast iron
Carbon content > 2%
Good resistance to corrosion.
Very hard.
Is brittle.
Products made from cast iron: engineers vice, manhole covers, cookware

11. Products made from cast iron
Cookware
Manhole cover
Engineer‘ vice

12. Copper.
Copper is ductile
It is a good conductor of heat
It is a good conductor of electricity.
Is expensive
Products made from copper
Electrical wires Plumbing fittings Decorative items

13. Aluminium
Is a good electrical conductor
Good conductor of heat
Is a light material
Has lower strength than steels
Products made from aluminium.
Ladder Windows Kitchen utensils

14. Zinc
Is a soft metal.
It is ductile
Has good corrosion resistance.
Product made from zinc/ uses of zinc
Dry cells Galvanising steel

15. Important what you need to remember for exams. Complete the following table. 1st for ferrous
metals, 2nd for non ferrous metals.
Table for ferrous metal Table for non ferrous metal