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RM > Metals > Flashcards

Metals Flashcards

1
Q

What are the 4 qualities of cast iron?

A

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

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2
Q

What are the uses of cast iron?

A

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

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3
Q

What are the 4 qualities of mild steel?

A

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

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4
Q

What are the uses of mild steel?

A

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

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5
Q

What are the 4 qualities of tool steel?

A

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

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6
Q

What are the uses of tool steel?

A

Hand tools like screwdrivers, garden tools and springs.

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7
Q

What are the 4 qualities of high speed steel?

A

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

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8
Q

What are the uses of high speed steel?

A

Drill bits, lathe tools and milling cutters.

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9
Q

What are the 4 qualities of stainless steel?

A

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

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10
Q

What are the uses of stainless steel?

A

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

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11
Q

What are the 5 qualities of aluminium?

A 
Non-ferrous
Light grey
Can be polished to mirror-like quality
Light weight
Can be anodised to protect the surface
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12
Q

What are the uses of aluminium?

A

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

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13
Q

What are the 4 qualities of copper?

A

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

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14
Q

What are the uses of copper?

A

Plumbing and electrical components and copper plated roofing.

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15
Q

What are the 4 qualities of lead?

A

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

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16
Q

What are the uses of lead?

A

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

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17
Q

What are the 5 qualities of tin?

A 
Non-ferrous
Ductile and malleable
Silver
Resistant to corrosion
Tinplate is steel with a tin plating
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18
Q

What are the uses of tin?

A

Coating on food cans and similar containers.

19
Q

What are the 3 qualities of zinc?

A

Non-ferrous
Very resistant to corrosion from moisture
Very weak

20
Q

What are the uses of zinc?

A

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

21
Q

What are the 4 qualities of gold and silver?

A

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

22
Q

What are the uses of gold and silver?

A

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

23
Q

What are the 4 properties of brass?

A

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

24
Q

What are the uses of brass?

A

Decorative metal work and plumbing accessories.

25
Q

What are the 3 qualities of guilding metal?

A

Alloy
85% copper and 15% zinc
Darker than brass

26
Q

What are the uses of guilding metal?

A

Sheet metal sculptures and architectural metalwork and jewellery.

27
Q

What are the 5 qualities of pewter?

A 
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
Q

What are the uses of pewter?

A

Drinking tankards, jewellery, picture frames, decorative gifts.

29
Q

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

A

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

30
Q

What are the uses of casting alloy (LM4)?

A

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

31
Q

What are the 4 qualities of duralumin?

A

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

32
Q

What are the uses of duralumin?

A

Aircraft bodies, cars and door handles.

33
Q

What is a steel rule used for?

A

Measuring lengths and setting odd legs and dividers.

34
Q

What is an engineering square used for?

A

Marking out 90 degree angles from the edge of the material.

Checking square corners on materials.

35
Q

What is an engineering bevel?

A

A sliding bevel that can be set to any angle.

36
Q

What is a scriber?

A

A tool used for marking accurate lines.

37
Q

What is marking blue?

A

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

38
Q

What are dividers?

A

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

39
Q

What are odd-leg callipers?

A

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

40
Q

What are surface gauges and surface plates used for?

A

Marking out accurate parallel lines.

41
Q

What is a dot punch?

A

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
Q

What is a centre punch?

A

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
Q

What is welding?

A

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

44
Q

What is soldering?

A

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.

RM (18 decks)

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