Question

Delta iron occurs at temperature of:

• A. room temperature
• B. above melting point
• C. between 1400${}^{\circ }C$ to 1539 ${}^{\circ }C$
• D. between 910 ${}^{\circ }C$ to 1400 ${}^{\circ }C$

Answer 1

The correct option is C between 1400${}^{\circ }C$ to 1539 ${}^{\circ }C$

Delta iron occur at temperature of between 1400 ${}^{\circ }C$ to 1539 ${}^{\circ }C$.
Note: Delta iron has body-centered cubic unit cell and occurs only at very high temperatures. It is stable above a temperature of 1390 ${}^{\circ }C$.