Metals alloys and polymers

Question 1

What is a ferrous material

Answer 1

A Metal or alloy made up of or containing mostly iron

Question 2

Properties of ferrous metals

Answer 2

Mostly magnetic
strong
rusts

Question 3

Examples of ferrous metals and their properties

Answer 3

Cast Iron - Iron and 2-3.5% carbon and silicone , strong against compression but brittle and not malleable ,car brake disks , bench vices

low carbon steel - iron and 0.05- 0.35% carbon , its strong and cheap , rusts easily but cannot be hardened - car bodies, nuts bolts.

High carbon steel - iron and 0.5-1.5% carbon , - tools , chisels , files , saws

Question 4

Advantages of non ferrous metals

Answer 4

Don’t rust so they are useful if they are likely to be exposed to moisture

Question 5

Examples of non ferrous metals

Answer 5

aluminium - lightweight but expensive, hard to join ,not as strong as steel but strong for weight - used in aeroplanes , cans and ladders.
Copper - soft malleable ductile and cood conductor , used in electrical wiring and pipes

Question 6

high speed steel

Answer 6

H.S.S has iron and 0.6% carbon and other metals and it keeps its hardness at high temperatures , so its used in high speed cutting tools

Question 7

brass

Answer 7

harder and stronger than both copper and zinc but its made of them both.Its malleable ductile and a good electrical conductor , resistant to corrosion - its non ferrous

Question 8

stainless steel

Answer 8

Made of Iron carbon chromium and nickel , used in surgical equipment sinks and cutlery

Question 9

Thermoforming plastics

Answer 9

thermoforming plastics don’t resist heat well so they’re easily formed into different shapes, they’re recyclable and bendy examples could be acrylic, polystyrenes in plastic chairs , washing baskets , plastic bottles ect

Question 10

Thermosetting plastics

Answer 10

Thermosetting plastics are non recyclable and rigid - when heated they become permanently rigid , used in Electrical fittings and pan handles