Engineering Materials
Chromium in steel

Gives ductility, toughness, tensile strength and anti-corrosion properties
Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties
Improves cutting ability and reduces hardenability
Improves wear resistance, cutting ability and toughness

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Engineering Materials
The unit cells

Contain the smallest number of atoms which when taken together have all the properties of the crystals of the particular metal
May be defined as the smallest parallelepiped which could be transposed in three coordinate directions to build up the space lattice
All of these
Have the same orientation and their similar faces are parallel

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