2stix
NAXJA Forum User
- Location
- fallbrook Ca.
If money is no object, go chromoly steel. More strength less weight.
probably one of the biggest misconceptions with chromoly steel. it does NOT weigh any less than other grades of steel tubing. how this came about was fabricators would build a chassis from chromoly but use a thinner walled tubing. then claim it weighs less than a mild steel built chassis. i wont go into the technical stuff because it is quite lengthy, but basically, chromoly has a higher tensile strength than mild steel. meaning it will not BEND as much as mild steel will with the same amount of force given. but it will fracture before mild steel does. especially around a weld that was not annealed properly afterwards to regain the tensile strength the chromoly tubing had before the weld. both mild steel and chromoly have their purposes and uses. for areas of little to no flex, chromoly is proffered. especially if a certain tensile strength is needed, you could use a thinner walled chromoly to save weight. for the DIYer chromoly is pretty much a waste of money unless you plan to have the welded areas annealed afterwards.