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Tuesday, 13 November 2018

Which one of the following materials is very hard and very ductile?

  By GK Planet Team       Tuesday, 13 November 2018
Q. Which one of the following materials is very hard and very ductile?
  1. Carborundum 
  2. Tungsten 
  3. Cast iron 
  4. Nichrome
Answer: Nichrome

Ductility is a measure of a material's ability to undergo significant plastic deformation before rupture, which may be expressed as percent elongation or percent area reduction from a tensile test.

Malleability, a similar property, is a material's ability to deform under compressive stress; this is often characterized by the material's ability to form a thin sheet by hammering or rolling.

Nichrome (NiCr, nickel-chrome, chrome-nickel, etc.) is any of various alloys of nickel, chromium, and often iron (and possibly other elements). The most common usage is as resistance wire, although they are also used in some dental restorations (fillings) and in a few other applications.
Nichrome alloys are known for their high mechanical strength and their high creep strength. The properties of nichrome vary depending on its alloy.
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