Are crankshafts forged or cast ？

Discover the differences between forged and cast crankshafts: forged offers superior strength for high-performance engines, while cast provides cost-effective solutions for standard vehicles.

Crankshafts can be forged or cast, depending on their application:

Forged Crankshafts:

Made by shaping heated steel billets under high pressure.

Superior strength and fatigue resistance, ideal for high-stress engines (e.g., diesel, racing).

Common materials: alloy steels like 49MnVS3.

Cast Crankshafts:

Created by pouring molten metal (nodular iron or cast steel) into molds.

Cost-effective for mass production (e.g., standard gasoline engines).

Less durable under extreme loads due to potential air pockets.

Key Difference: Forged crankshafts prioritize strength for heavy-duty use, while cast crankshafts balance cost and complexity for everyday applications.