METALS Flashcards
What are the non-ferrous metals?
Aluminium
Copper
Zinc
Silver
Gold
Titanium
Tin
What are the ferrous metals?
Low carbon steel
Medium carbon steel
Cast iron
What are the ferrous alloys?
Stainless steel
High speed steel (HSS)
Die steel (tool steel)
What are the non-ferrous alloys?
Bronze
Brass
Duralumin
Pewter
Describe aluminium
lightweight, ductile, malleable, corrosion resistant, electrical and thermal conductor, can be metal inert gas (MIG) and tungsten inert gas (TIG) heat welded
Uses of aluminium?
drinks cans
aircraft bodies
bike frames
window frames
packaging
baking foil
Describe copper
ductile, malleable, tough, corrosion resistant, good electrical and thermal conductor, can be soldered and brazed
Uses of copper?
electrical wire
printed electrical circuits
water pipes
hot water tanks
central heating pipes
Describe zinc
low melting point, good corrosion resistance
Uses of zinc?
galvanizing steel as protective coating for dustbins, buckets, farm gates
intricate die castings
Describe silver
malleable, ductile corrosion resistant, can be soldered
Uses of silver?
jewellery
cutlery
used for plating other materials
Describe gold
malleable, ductile, corrosion resistant, can be soldered
Uses of gold?
jewellery
electronic components
connectors
switch components
Describe titanium
hard, similar strength to steels but more lightweight, high resistance to corrosion
Uses of titanium?
joint replacements
tooth implants
spectacle frames
aircraft
spacecraft
golf clubs
bicycles
ship hulls
Describe tin
ductile, malleable, low melting point, corrosion resistant
Uses of tin?
soft solder
coatings for food cans
rarely used in pure form
Describe low carbon steel
ductile, high tensile strength, tough, malleable, poor resistance to corrosion
What percent of low carbon steel is carbon?
0.15-0.30%
Uses of low carbon steel?
nuts
bolts
washers
screws
car bodies
Describe medium carbon steel
harder than low carbon steel but less ductile, malleable, tough
What percent of medium carbon steel is carbon?
0.30-0.70%
Uses of medium carbon steel?
springs
gardening tools such as trowels and forks
Describe cast iron
Hard outer skin but brittle core, good under compression
What percent of cast iron is carbon?
3.5%
Uses of cast iron?
disc brakes
machine parts
engine blocks
sheet furniture
Describe stainless steel
tough, hard, corrosion resistant
Uses of stainless steel?
sinks
kitchenware
cutlery
What elements are in stainless steel and what percent of the material do they make up?
18% chrome
8% nickel
Describe high speed steel
hard, tough, high level of resistance to frictional heat
Uses of high speed steel?
tools blades
drill bits
milling cutters
router bits
What elements are in high speed steel and what percent of the material do they make up?
18% tungsten
4% chromium
1% vanadium
0.5-0.8% carbon
Describe die steel
hard, tough
Uses of die steel?
blanking punches and dies
extruder dies
fine press tools
Describe bronze
tough, corrosion resistant, can be cast
Uses of bronze?
statues
coins
bearings
What elements are in bronze and what percent of the material do they make up?
90% copper
10% tin
Describe brass
corrosion resistant, good electrical and thermal conductor, low melting point, casts well
Uses of brass?
boat fittings
door furniture
cast valves and taps
ornaments
What elements are in brass and what percent of the material do they make up?
65% copper
35% zinc
Describe duralumin
equivalent strength properties to low carbon steel but more lightweight, ductile, becomes harder as it is worked
Uses of duralumin?
aircraft parts
vehicle parts
What elements are in duralumin and what percent of the material do they make up?
4% copper
1% magnesium and manganese
Describe pewter
malleable, low melting point, casts well
Uses of pewter?
flasks
goblets
photo frames
decorative items
candlesticks
sports trophies
What elements are in pewter and what percent of the material do they make up?
85-99% tin
remainder of material consisting of copper and antimony
What are the stock forms of metals?
sheet
plate
bar
tube
structural - angular shapes such as H beams, L beams, I beams, tee bar and channel