| Mild steel
- A ductile and malleable metal. Mild steel
will rust quickly it is in frequent contact
with water. Properties – iron mixed
with 0.15-0.29% carbon.
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|| Used as Nuts and bolts,
Building girders, car, bodies, gates, etc.
| Cast iron
- Is a very strong when it is in compression
and is also very brittle. Properties –
It is re-melted pig iron with small quantities
of other metals. It consists of 93% iron and
4% carbon plus other elements. Learn
|| Used as car Brake discs,
car cylinders, metalwork vices, manhole covers,
machinery bases eg: The pillar drill.
|High carbon steel
/ Tool steel - Is a very strong
and very hard, resistant to abrasion. It is
also known as ‘high carbon’ steel
or ‘medium’ steel. Properties
– Up to 1.5% carbon content. Learn
||Used for hand tools such
as screwdrivers, hammers, chisels, saws, spring
and garden tools.
- is very resistant to ware and water corrosion
and rust. Properties – It is an alloy
of iron with a typical 18% chromium 8% nickel
and 8% magnesium content. Learn
||Used for kitchen sinks,
cutlery, teapots, cookware and surgical instruments.
|High speed steel
- is a metal containing a high content
of tungsten, chromium and vanadium. However
it is very brittle but is also very resistant
to wear. Learn
||Used for drill bits, lathe
tools, milling cutters on milling machines.
It is used where high speeds and high temperatures