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Low Carbon Steels or mild steel
It contains less than 0.25 % carbon. These
steels are hot worked and produced for beam and
structural application. Low carbon steels are
not hardened appreciably by hardening process of
heat treatment. A decrease in carbon content
improves ductility mild steels are used for
wires, rods, thin sheets, solid drawn tube,
boiler plates, steel joints, channels and
angles, structural sections, drop forgings.
Mild Steel are classified as follows
1) Dead Mild Steel:
It contains 0.05% to 0.15% carbon. It is used
for making steel wires, sheets, rivets, screws,
pipe, nail and chain. It has a tensile strength
of 390 N/mm2 and a hardness of about 115 BHN.
2) Mild Steel
It contains 0.15 to 0.20% carbon and has a
tensile strength of 420 N/mm2 and hardness 125 BHN. It is used for making camshafts, sheets and
strips for fan blades, welded tubing, forgings,
drag lines etc.
3) Mild Steel
It contains 0.20 to 0.30% carbon and has a
tensile strength of 555 N/mm2 and a hardness of
140 BHN. It is used for making valves, gears,
crankshafts, connecting rods, railway axles,
fish plates, small forgings etc.
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