Materials and Construction
Monel alloy is

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

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

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