Ferrous

Question 1

Low carbon steel

Answer 1

Ductile, high tensile strength, tough, malleable, poor resistance to corrosion
Carbon content 0.15-0.30%
Melt temp 1427

Uses: nuts, bolts, washers, screws, car bodies

Question 2

Medium carbon steel

Answer 2

Harder. Malleable and tough
Carbon content 0.30-0.70%
Melt temp- 1425-1540

Uses: springs, gardening tools

Question 3

Cast iron

Answer 3

Harder outside, brittler core, good under compression
Carbon content 3.5%
Melt temp 1149

Uses: disc brakes, machine parts, engine blocks