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

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

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Materials and Construction
Duriron is

Acid resistant, brittle and very hard
All of these
High silicon iron
Prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion

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Materials and Construction
Monel alloy is

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
The costliest of all the alloys of nickel

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