beta iron

Beta iron is a nonmagnetic form of iron that exists between 768°C and 910°C. It is identical to alpha iron, differing only in its magnetic properties. Iron's allotropy, or its existence in different crystalline forms, is crucial for steel production. Below 912°C, iron has a body-centered cubic (bcc) structure, known as ferrite or alpha iron at lower temperatures. Between 912°C and 1,394°C, it adopts a face-centered cubic (fcc) structure called austenite or gamma iron.12

Iron is primarily extracted from ore through surface mining, which is more cost-effective than underground mining. Processes like direct reduction aim to release iron from its ore below its melting point, producing a spongy material called direct-reduced iron (DRI). Concentrated iron ores are often formed into pellets, which are then dried and hardened by firing at high temperatures before being cooled.34