Chrome moly?
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From: fremont ohio
Chrome moly?
I've been hearing a lot about this kind of metal. Anyone know what exactly it is, what it is made out of, or anything? It seems race teams are using chrome moly tubing for frames.
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Originally Posted by weldingfreak
It is the same stuff rifle barrels are made of.
Chrome-moly is a steel alloy. Chromium and Molybinium (sp) is added to the steel during the forging process to make is stronger. How? Sorta complicated answer... re-aligns the steel's molecular structure in a way... Because the tubes are stronger for their weight, a chassis builder can play with the design to gain the best strength to weight ratio.
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Looking at the tensile and yeild strength numbers, Chromoly tubing (4130) is 25% to 30% stronger than low carbon steel (1025). I've only brazed bicycle frames with Chro-Mo tubing, but those that have mig/tig welded it, say it's trickier than reg steel due to the thinner walls.
