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

Heat resisting steel
Austenitic stainless steel
High speed steel
Invar

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

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

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