Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work.

 
 
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Default stiffness

Is there a general rule(s) that describe the stiffness of a round tubing
to the stiffness of a solid rod? For instance: is 1" dia. round rod
stiffer than 1 " dia. x .125" wall tubing? How much larger dia. tubing
equals a solid rod of a certain dia.?
Is tubing inherently stiffer because it has 2 surfaces (inside and
outside) that oppose each other? Thanks.

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