Materials and Construction
Pure nickel is

Ferromagnetic above its curie point (i.e., 415°C)
Ferromagnetic at room temperature
Having h.c.p. crystal lattice
Not resistant to oxidation at high temperature

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Materials and Construction
Mild steel is

A low carbon steel (0.05 to 0.3% carbon)
Very poor in strength & ductility
Highly resistant to corrosion (as much as stainless steel)
A high carbon steel (0.5 to 1.5% carbon)

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Materials and Construction
Hastelloy C is a good material of construction in chemical process industry, since it is

Highly corrosion resistant and is readily fabricated
Corrosion resistant to most alkalis, particularly because of its coper content
Light and resists attack by acids
Relatively inexpensive although it can be fabricated with some difficulty

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