Which element is always present with iron in mild steel?

Options

A. Aluminium
B. Carbon
C. Chromium
D. Nickel

Explanation

**Step-by-Step Solution:**

1. **Understanding Mild Steel**: Mild steel is a type of steel that is commonly used in construction and manufacturing. It is known for its ductility, malleability, and strength.

2. **Composition of Mild Steel**: The primary components of mild steel are iron and carbon. Iron is the main element, while carbon is added to enhance certain properties of the steel.

3. **Identifying the Element**: In mild steel, the element that is always present alongside iron is carbon. The carbon content typically ranges from 0.05% to 0.25%, which helps improve the hardness and strength of the steel.

4. **Conclusion**: Therefore, the element that is always present with iron in mild steel is carbon.

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