I'm not looking for an argument either but no, comments on stiffness have nothing to do with strength. Stiffness and strength of a material are not interchangable, one does not follow the other.
No, strength does not include stiffness. A thinner walled chromoly tube will be less stiff than a thicker walled mild steel tube of the same OD. Which doesn't really matter here when we're talking about a first time builder with a flux core welder so I'm not going to go on about it, but you can look it up if you don't believe it.
We're obviously getting way into the weeds here and contrary to how it may appear, I'm not wanting to argue about it either.
The point was to not decide on a material based on probable misconceptions about the benefits a home builder with a flux core welder might see.
