Forged vs Cast Knuckles: Why the Difference?

Context: Automotive
Thread starter yct08280
Start date Mar 26, 2014
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SUMMARY

The discussion clarifies the differences between forged and cast knuckles in automotive suspension systems, specifically highlighting that knuckles in McPherson strut designs are typically cast, while those in double wishbone designs are forged. Casting is favored for its cost-effectiveness and ability to withstand compression, whereas forging is preferred for its superior tensile strength resulting from grain alignment during the forging process. This distinction is crucial for understanding the performance characteristics of different suspension systems.

PREREQUISITES

Understanding of automotive suspension systems
Knowledge of material properties, specifically tensile and compressive strength
Familiarity with manufacturing processes: casting and forging
Basic engineering principles related to load distribution

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Research the impact of material selection on automotive performance
Explore the manufacturing processes of casting and forging in detail
Learn about the design considerations for McPherson strut vs. double wishbone suspension systems
Investigate the effects of grain structure on material strength in forged components

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Automotive engineers, suspension designers, and materials scientists interested in the performance and manufacturing differences between forged and cast components in vehicle suspension systems.

Mar 26, 2014

yct08280

knuckle in McPherson strut is casting & in double wishbone is foring?
why?

Last edited by a moderator: Mar 26, 2014

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Mar 27, 2014

Baluncore

Science Advisor

2025 Award

A casting is cheap and able to withstand compression, but less able to withstand tension.
A forging has a greater tensile strength due to grain alignment flow during the forging process.