Materials and Construction
A steel alloy containing 36% nickel is called __________ , which has a zero co- efficient of expansion.

Austenitic stainless steel
Heat resisting steel
Invar
High speed steel

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Materials and Construction
Monel alloy is

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

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