Hardness of cementite is of the order of BHN.
200
300
400
None of these
None of these
Cementite
is a compound of iron and carbon, more precisely an intermediate transition
metal carbide with formula Fe3C
●By
weight, it is 6.67% carbon and 93.3% iron.
●It
has an orthorhombic crystal structure.
●Hardness
of cementite is around 550 BHN.
Hence,
the correct option is (D).
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