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Extraction Of Iron
KINDS OF STEEL
COMPOSITION (% CARBON)
COMPOSITION (% CARBON) PROPERTIES
USES
Wrought iron
Very low
Relatively soft; malleable and ductile
Decorative railings etc., electromagnets
a) carbon steel
i) Low carbon steel
0.2% C
Mild steel, ductile
Sheets, iron wires, pipe
ii) Medium carbon steel
0.33---0.7% C
Medium steel, hard, forged and can be welded
Rails, structural steel boiler plates, axles.
iii) High
carbon steel
0.7---1.5% C
Hard steel, very hard, brittle
Surgical instruments, razors, blades, springs, cutlery
b) Stainless Steel
14-18 Cr
7-9% Ni
Hard, resistant to corrosion, attractive in appearance
Cutlery, car accessories, watch cases, utensils.
c) Alloy steel
i) manganese steel
10-18% Mn
Hard, tough resistant to wear
Railway tracks, rails, safes, armor plates.
ii) Silicon Steel
1-5% Si
hard and strong highly magnetic
Permanent magnets
iii) Nickel Steel
2-4% Ni
Hard and elastic resistant to corrosion
Drive shafts, gears, cables.

 

 

 

 

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