Engineering Materials
Following elements have face-centered cubic structure

All of these
Mg, Zn, Ti, Zr, Br, Cd
Gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt
A iron (below 910°C and between 1400 to 1539°C), W

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Engineering Materials
Cobalt in steel

Improves cutting ability and reduce hardenability
Gives ductility, toughness, tensile strength and anti corrosion property
Refines grain size and produces less tendency to carburisation, improve corrosion and heat resistant proper ties
Improves wear resistance, cutting ability and toughness

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Engineering Materials
The charge of the blast furnace consists of

Calcined ore (8 parts), coke (4 parts) and limestone (1 part)
Calcined ore, coke and limestone all in equal parts
Calcined ore (4 parts), coke (1 part) and limestone (8 parts)
Calcined ore (1 part), coke (8 parts) and limestone (4 parts)

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Engineering Materials
The temperature required for full annealing in hypereutectoid steel is

30° C to 50° C above upper critical temperature
30° C to 50° C below upper critical temperature
30° C to 50° C above lower critical temperature
30° C to 50° C below lower critical temperature

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