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Flashcards in Metals Deck (44):
1

What are the 4 qualities of cast iron?

Ferrous
Made of pig iron with small quantities of other metals
93% iron and 4% carbon
Strong in compression, but brittle

2

What are the uses of cast iron?

Metalwork vices, brake disks and drums, manhole covers, machinery bases and car cylinder blocks.

3

What are the 4 qualities of mild steel?

Ferrous
Made of iron mixed with 0.15% to 3% carbon
Ductile and malleable
Rusts quickly when exposed to moisture

4

What are the uses of mild steel?

Nuts, bolts, car bodies, furniture frames, gates and girders.

5

What are the 4 qualities of tool steel?

Ferrous
Also known as medium or high carbon steel
Up to 1.5% carbon
Strong and hard

6

What are the uses of tool steel?

Hand tools like screwdrivers, garden tools and springs.

7

What are the 4 qualities of high speed steel?

Ferrous
High chromium, tungsten and vanadium content
Used in machines with high speeds and temperatures
Brittle but resistant to wear

8

What are the uses of high speed steel?

Drill bits, lathe tools and milling cutters.

9

What are the 4 qualities of stainless steel?

Ferrous
18% chromium and 8% nickel (iron alloy)
Resistant to wear and corrosion
Doesn’t rust

10

What are the uses of stainless steel?

Cutlery, teapots, dishes, surgical instruments and kitchen sinks and fittings.

11

What are the 5 qualities of aluminium?

Non-ferrous
Light grey
Can be polished to mirror-like quality
Light weight
Can be anodised to protect the surface

12

What are the uses of aluminium?

Cooking foil, saucepans, chocolate wrappers, window frames, toy cars and ladders.

13

What are the 4 qualities of copper?

Non-ferrous
Reddish-brown, but can turn green in oxygen
Excellent conductor of electricity and heat
Ductile and malleable

14

What are the uses of copper?

Plumbing and electrical components and copper plated roofing.

15

What are the 4 qualities of lead?

Non-ferrous
Heavy with blue-grey surface
Malleable and soft
High resistance to moisture and acid corrosion

16

What are the uses of lead?

Car battery cells, weather proofing buildings and solder for plumbing.

17

What are the 5 qualities of tin?

Non-ferrous
Ductile and malleable
Silver
Resistant to corrosion
Tinplate is steel with a tin plating

18

What are the uses of tin?

Coating on food cans and similar containers.

19

What are the 3 qualities of zinc?

Non-ferrous
Very resistant to corrosion from moisture
Very weak

20

What are the uses of zinc?

Die casting alloys and as a coating on buckets, galvanised steel and screws.

21

What are the 4 qualities of gold and silver?

Non-ferrous
Precious
Ductile and malleable
Silver tarnishes but gold is resistant to oxidation

22

What are the uses of gold and silver?

Jewellery and plating on wires to increase contact and reduce resistance.

23

What are the 4 properties of brass?

Alloy
Hard and yellow
65% copper and 35% zinc
Cast and machined, then chromium plated

24

What are the uses of brass?

Decorative metal work and plumbing accessories.

25

What are the 3 qualities of guilding metal?

Alloy
85% copper and 15% zinc
Darker than brass

26

What are the uses of guilding metal?

Sheet metal sculptures and architectural metalwork and jewellery.

27

What are the 5 qualities of pewter?

Alloy
Lead free (for safety) that’s easily cast
92% tin, 6% antimony and 2% copper
Bright, mirror like finish when polished
Low melting point

28

What are the uses of pewter?

Drinking tankards, jewellery, picture frames, decorative gifts.

29

What are the 3 qualities of casting alloy (LM4)?

Alloy
Mostly aluminium with 3% copper and 5% silicon
Appears like pure aluminium

30

What are the uses of casting alloy (LM4)?

Sand casting and die casting engine components (especially on motorcycles).

31

What are the 4 qualities of duralumin?

Alloy
Aluminium alloy
Almost as strong as steel but 30% of the weight
4% copper and 1% manganese and magnesium

32

What are the uses of duralumin?

Aircraft bodies, cars and door handles.

33

What is a steel rule used for?

Measuring lengths and setting odd legs and dividers.

34

What is an engineering square used for?

Marking out 90 degree angles from the edge of the material.
Checking square corners on materials.

35

What is an engineering bevel?

A sliding bevel that can be set to any angle.

36

What is a scriber?

A tool used for marking accurate lines.

37

What is marking blue?

Thin ink spread on a metal surface and left to dry. When it is scratched it leaves a clear, shiny line.

38

What are dividers?

It looks like a compass and is used to mark out circles and arcs.

39

What are odd-leg callipers?

Tools used to scribe lines parallel to the edge of a metal.

40

What are surface gauges and surface plates used for?

Marking out accurate parallel lines.

41

What is a dot punch?

A conical point with a 60 degree angle used to mark out drill holes on a surface or indentations on lines that have been marked out.

42

What is a centre punch?

A centre punch has a sharp point to 90 degrees which marks out drill holes. They are often marked into dot punch holes to stop the drill wandering.

43

What is welding?

Heating the edges of metals so that a pool of molten metal is formed, which links the pieces when the metal cools.

44

What is soldering?

Cleaning a surface with flux and using a gas torch to heat the area, then applying solder which runs between two ‘parent metals’ to attach them.