In
the context of properties of steel, which of the following statements is highly
relevant?
Presence of manganese decreases strength.
Presence
of carbon does not influence the heat-treatment process.
Presence
of carbon contents imparts strength to iron.
Presence
of sulphide improves corrosion resistance.
Presence
of carbon contents imparts strength to iron.
In
the context of properties of steel :
●With
increasing carbon, the hardness and strength of unalloyed steels
increases.
●Above
a content of 0.8% C, the strength decreases.
●As
the carbon content increases, the proportion of cementite in
the steel also increases.
Hence,
the correct option is (C).
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