Originally Posted by
Lizardracing
Based on internet findings on a metal sales website
Chrome-Moly Tensile Stength = 90,000 psi
Diameter (in) Thickness (in) ID (in) Cross Sect. Area (in^2) Tensile Strength (lbs) Weight (lb/ft)
1.75 0.120 1.51 0.61 55,303 2.089 lb
1.75 0.095 1.56 0.49 44,453 1.679 lb
1.75 0.083 1.58 0.43 39,119 1.478 lb
1.50 0.120 1.26 0.52 46,821 1.769 lb
1.50 0.095 1.31 0.42 37,738 1.426 lb
1.50 0.083 1.33 0.37 33,253 1.256 lb
1.25 0.120 1.01 0.43 38,339 1.448 lb
1.25 0.095 1.06 0.34 31,023 1.172 lb
1.25 0.083 1.08 0.30 27,386 1.034 lb
DOM Tensile Stength = 70,000 psi
Diameter (in) Thickness (in) ID (in) Cross Sect. Area (in^2) Tensile Strength (lbs) Weight (lb/ft)
1.75 0.125 1.50 0.64 44,668 2.169 lb
1.75 0.095 1.56 0.49 34,575 1.596 lb
1.75 0.083 1.58 0.43 30,426 1.478 lb
1.50 0.120 1.26 0.52 36,416 1.769 lb
1.50 0.095 1.31 0.42 29,352 1.426 lb
1.50 0.083 1.33 0.37 25,863 1.256 lb
1.25 0.120 1.01 0.43 29,819 1.448 lb
1.25 0.095 1.06 0.34 24,129 1.172 lb
1.25 0.083 1.08 0.30 21,300 1.034 lb
HREW Tensile Stength = 40,000 psi
Diameter (in) Thickness (in) ID (in) Cross Sect. Area (in^2) Tensile Strength (lbs) Weight (lb/ft)
1.75 0.120 1.51 0.61 24,579 2.089 lb
1.75 0.095 1.56 0.49 19,757 1.596 lb
1.75 0.083 1.58 0.43 17,386 1.478 lb
1.50 0.120 1.26 0.52 20,809 1.769 lb
1.50 0.095 1.31 0.42 16,772 1.426 lb
1.50 0.083 1.33 0.37 14,779 1.256 lb
1.25 0.120 1.01 0.43 17,039 1.448 lb
1.25 0.095 1.06 0.34 13,788 1.172 lb
1.25 0.083 1.08 0.30 12,172 1.034 lb
If 2 chassis were identical, the Moly car would weigh less and be stronger over all but flex about the same.
If you go to mix matching tube sizes and types, there's a lot more math involved.