Wrought iron: Purest commercial form of iron

Q.  Which of the following is the purest commercial form of iron?
- Published on 16 Nov 15

a. Malleable iron
b. Gray iron
c. Cast iron
d. Wrought iron

ANSWER: Wrought iron
 
- Wrought iron is an iron alloy with a very low carbon (less than 0.08%) content in contrast to cast iron (2.1% to 4%), and has fibrous inclusions known as slag up to 2% by weight.
- Wrought iron is tough, malleable, ductile, corrosion-resistant and easily welded. Before the development of effective methods of steel making and the availability of large quantities of steel, wrought iron was the most common form of malleable iron.

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