• The stiffness is eaxctly the same across the tubes (207Gpa).

    The strength varies which does allow for thinner tube walls to save weight with better grades, but then the tube diameter has to be increased to get the stiffness back. My 953 track frame has 0.35mm walls in places and decently oversized tubes to make it very light and stiff but it will dent easily.

    ie Wot @Cupcakes sed

  • Sorry your original post was a bit misleading.

    Steel is an alloy. The stiffness depends on what and how much is mixed with iron.

    What I think you meant is carbon steels for bike frames are v close in properties.

  • Yeah I get ya.

    TBH I was surprised that the Reynolds given values for mild steel/CroMo are exactly the same as for stainless.

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