1.8 - FERROUS AND NON FERROUS METALS

Question 1

Define ferrous metal

Answer 1

A metal that contains iron so they corrode quickly ( if not treated with a suitable surface finish ).

Question 2

Define mild steel

Answer 2

Also known as low carbon steel because it has the lowest carbon content of the different steel types

Question 3

Mild steel contains..

Answer 3

Around 99% iron and a maximum of 0.25% carbon

Other elememts like maganese, sulphur, silicon make up the remaining fraction

Question 4

Mild steel is

Answer 4

Relatively affordable compared to other types of steel, it is easy to machine and weld

Question 5

Common uses of mild steel

Answer 5

Used in structural steel buildings signs, car in vehicle bodies and panels and wire

Question 6

stainless steel contains..

Answer 6

iron and between 15 and 30% of other metals (chromium and nickel)

Question 7

Properties of stainless steel

Answer 7

High resistance to corrosion compared to other types of steel, tough and ductile with high strength and temperature resistance.

Question 8

common stainless steel uses

Answer 8

Medical instruments, kitchen utensils and appliances , vehicle exhaust systems , hardware and structural/architectural items.

Question 9

Cast iron is…

Answer 9

A mixture of iron and 2% or more of carbon.

Question 10

Cast iron is heavy and…

Answer 10

Has good compressive strength but quite brittle and can crack / shatter under impact

Question 11

Cast iron has a..

Answer 11

Low melting point. and is more resistant to wear and corrosion than mild steel

Question 12

Is mild steel ferrous or non ferrous?

Answer 12

Ferrous

Question 13

Is stainless steel ferrous or non ferrous?

Answer 13

Ferrous

Question 14

Is cast iron Ferrous or non ferrous?

Answer 14

Ferrous

Question 15

What makes a metal ferrous?

Answer 15

Has iron in it.

Question 16

Properties of non ferrous metals

Answer 16

Much more corrosion resistant
Generally more expensive

Question 17

Aluminium has a…

Answer 17

High strength to wait to ratio as its light weight

Question 18

Aluminium properties:

Answer 18

Easy to cut and shape, high strength to weight ratio as its lightweight, Attractive so doesnt need a finish

Question 19

Common aluminium uses..

Answer 19

Drinks cans ,foils ,window frames ,air plane parts

Question 20

Copper is..

Answer 20

An excellent electrical and thermal conductor

Doesnt corrode or tarnish easily.

Question 21

Is copper strong?

Answer 21

Ductile, so easily shaped

Question 22

How is copper joined?

Answer 22

Easilyz by soldering or brazing

Question 23

Is copper attractive?

Answer 23

Can be polished to an attractive golden colour

Question 24

Common copper uses:

Answer 24

water pipes, electrical cables, jewellery, statues and outdoor decorative features

Question 25

Brass is an alloy of..

Answer 25

Copper and zinc

Question 26

Brass has..

Answer 26

good resistance to wear and corrosion, attractive appearance

Question 27

Common brass uses

Answer 27

Nuts, doorknobs, bolts, Instruments, bathroom fittings.