Question

Write the difference between pig iron cast iron and steel.

Answer 1

Pig iron:

• Pig iron, also referred to as crude iron, is an iron industry intermediate product used in the production of steel that is formed by smelting iron ore in a blast furnace.
• It contains around $4\%$ carbon and several impurities like as $\mathrm{S},\mathrm{P},\mathrm{Si},\mathrm{Mn}$, and others.

Cast iron:

• Cast iron is an iron alloy containing $2\mathrm{to}4\%$ carbon, as well as various levels of silicon and manganese and residues of contaminants such as sulphur and phosphorus.
• Iron ore is reduced in a blast furnace to produce it.

Steel:

• Steel is an iron alloy with a few tenths of a percent carbon added to improve fracture toughness resistance when compared to other kinds of iron.
• Many elements may exist or be added.
• Corrosion- and oxidation-resistant stainless steels normally require an additional $11$ percent chromium.

Difference between pig iron cast iron and steel: