Materials and Construction
Duriron is

All of these
High silicon iron
Acid resistant, brittle and very hard
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
Used for making steam valves and turbine blades as it resists steam attack at high temperature
Not used in cast and wrought forms
The costliest of all the alloys of nickel

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