Materials and Construction
Monel alloy is

The costliest of all the alloys of nickel
Not suitable for making kitchen utensils
Not used in cast and wrought forms
Used for making steam valves and turbine blades as it resists steam attack at high temperature

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

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

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