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Old 09-27-2010, 01:15 PM   #15
Scooby Specialist
Member#: 245851
Join Date: May 2010
Chapter/Region: MWSOC
Location: Fairfield Township(Cincinnati)
2004 WRX Rally car


Easy one: 4130 aka chrome-moly aka t45. It is what all race car roll cages and subframes are made out of. It has an infinite fatigue life (unlike aluminum) if properly designed and can be made nearly as lightweight as aluminum. Look up MSI's subframes. Common diameters are .75"-1.5" and wall thicknesses of 0.049"-0.095".
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Last edited by bigusnickus; 09-27-2010 at 01:18 PM. Reason: gave wall thickness and diameters
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