Tube vs Bar, comparison chart.

[gnutz2]

I'm looking for a comparison chart/graph that compares tube strength (in torsion) at varying wall thickness to solid bar of the same diameter.

Basically i'm making some anti roll bars from either T45 or 4130 cromoly tube and need to get some rough figures before i order the stock tube.

I was thinking of tube diameters in the range of 15-35mm from 1.5-3mm wall thickness.

Help will be greatly appreciated

[Simons]

Hi, I have a good threat talking about different materials, the problem is that it's on my language but you have some mathematic formulas to compare the strength ( I ) and hardness ( W ), think that the translation is good...also they talk about materials

http://www.supercrosscar.com/foro/showthread.php?2370-Chasis-CM&

[gnutz2]

Thanks for the formulea, i'll have a play around with some numbers tonight

If only i could use excel, i could make a very interesting spread sheet