The recrystallization temperature is an important characteristic of steel, as it determines the temperature range at which new strain-free grains are formed from the earlier deformed ones. The correct answer is option 'C', which states that the recrystallization temperature for steel is close to 8000°C.

Recrystallization is a process that occurs in metals when they are heated to a specific temperature range. During cold working or deformation, the crystal structure of the metal becomes distorted and dislocations are introduced. These dislocations cause the metal to become harder and stronger, but they also reduce its ductility and can lead to brittleness.

When the steel is heated to the recrystallization temperature, the dislocations start to rearrange and the deformed grains begin to recrystallize. This process is driven by the reduction of internal energy and the formation of strain-free grains. The recrystallization temperature is specific to each type of steel and depends on its composition and microstructure.

Here are some key points to understand about the recrystallization temperature of steel:

1. Recrystallization Temperature Range: The recrystallization temperature range for steel is typically between 700°C and 1000°C. This temperature range allows for the rearrangement of dislocations and the formation of new strain-free grains.

2. Factors Affecting Recrystallization Temperature: The recrystallization temperature of steel is influenced by several factors, including the type of steel, the amount of cold working or deformation, and the presence of alloying elements. Higher carbon steels generally have higher recrystallization temperatures compared to low carbon steels.

3. Effect on Mechanical Properties: Recrystallization plays a crucial role in improving the mechanical properties of steel. The formation of new strain-free grains leads to a reduction in hardness and an increase in ductility and toughness. This makes the steel more suitable for forming and shaping processes.

4. Industrial Applications: Understanding the recrystallization temperature of steel is essential for various industrial processes. For example, in hot rolling and forging operations, the temperature needs to be carefully controlled to ensure that the steel is sufficiently hot for recrystallization to occur, but not excessively hot to cause grain growth.

In conclusion, the recrystallization temperature of steel is close to 8000°C. This temperature range allows for the rearrangement of dislocations and the formation of new strain-free grains, leading to improved mechanical properties and enhanced formability of the steel.