Compared to casting and billets, forged metal is known for which characteristics?

• A. Higher strength and toughness
• B. Higher porosity
• C. Lower density
• D. Poor machinability

Answer: (A)

Forging strengthens metal by deforming it under high pressure, which reshapes the grain structure into a continuous, directional flow and high dislocation density. This refined internal structure resists crack initiation and propagation, giving forged metal higher strength and toughness than material produced by casting or as billets. The process also pushes out and closes internal voids, so porosity is reduced, not increased.

Density stays essentially the same for a given alloy, so lower density isn’t a feature of forging. While the tougher, more rigid microstructure can make some forged parts a bit harder to machine, machinability isn’t the defining advantage of forging; the standout qualities are the markedly improved strength and toughness.