Give the classification of plain carbon steel. Write composition, one property and one use of different plain carbon steel.

Give the classification of plain carbon steel. Write composition, one property and one use of different plain carbon steel.
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1 Answer

Answer :

Classification:

a) Mild or low carbon steel – 0.05 to 0.3% carbon

b) Medium carbon steel – 0.3 to 0.6% carbon

c) High carbon steel – 0.6 to 1.5% carbon


Properties
Low or Mild Carbon Steel
Medium Carbon Steel
High Carbon Steel
i)Hardness
Soft, tough, malleable, ductile
Harder & tougher than steel
Quite hard. 
ii)Weldability
Suitable for welding
Fairly good for welding (not easily)
Unweldable
iii)Heat treatment 
Responds to heat treatment
can be hardened by heat treatment.
can be imparted desired hardness by heat treatment highest
iv)Tensile Strength
low
high
Highest
Uses :- 
Soft wires, wires for rope, chains, rivets, bolts, nails, boiler tubes
Rail roads, wheels, axles, fish – plates, turbine rotors, springs, gun parts, machine parts etc.
Wooden working tools, chisels, saws, drills, metal cutting tools for lathes, cutters, knives, blades, razors etc.
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