Roll Cage Chromoly Or Mild Steel

Crome molly i have mild steel in my own car and all the dragsters are 4130 molly.

Roll cage chromoly or mild steel. The chromium adds strength hardenability and a level of corrosion resistance to mild carbon steel though chromoly is not as corrosion resistant as stainless steel. The guy that caged my aspen told me the civic eg roll cage uk tube by tube. I need to put in a 8 50 cert. Roll cage question chromoly vs mild steel.

I m cutting out our 8 point 1 3 4 roll bar out of the 80 camaro. I have a dragster frame and i don t know what it is made of. I know that the cm is lighter than mild steel of the same diameter but harder to. A quick guide to what.

A mild steel roll cage. Compared to that the cost of upgrading mild steel dom tubing to chromoly isn t that big of a deal cline says. If it is mild steel then i have to rebuild the whole thing. X 118 mild steel or 083 4130 chromoly tubing so this is another aspect to take into play when building or expanding a roll cage as your vehicle gets faster.

If the budget allows it and there is time cline always prefers to tig weld a cage. My hp book on metal working and fabrication said its not good to use chromoly for making roll cages as when its involved in an impact it can break off into a sharp point. Jump to latest follow 1 13 of 13 posts. They said it was about 40 lbs.

That s not alot in my opinion. Cage mild steel vs. All roll bars cages constructed of 4130 chromoly tubing must be welded using an approve tig heliarc process while mild steel must be done with an approved mig wire feed or tig heliarc process. Had i to do it over again i would still go with mild steel.

Chromoloy tubing is made from a family of low alloy steels that contain chromium and molybdenum sae 4130 or 4140 along with the iron carbon and other elements. The dragsters usually have to be backhalved after so many laps. The only real reason to use chromoly in this application is a weight savings. This would be in a 2nd about bolt in cages weld in cages roll on another forum the question of cost and weight came up over a chromoly rollcage vs.

The tubing size requirement on 8 50 cages are 1 5 8 inch x 118 inch mild steel or 083 inch chromoly. If anyone has a viable answer please let me know. While you probably won t stress them out like we do i have seen them break while riding in the trailer. If it s chromoly then i just have to replace a couple of struts and add more to my roll cage to bring it to specs.

I thought i wanted a chromoly cage for a weight savings but now thinking about mild steel. I asked wolfe racecraft what the weight difference was between a 10 point mild steel cage and a 10 point chromoly cage. I bought a mild steel 10 point cage from s w racecars. Grinding and plating of the welds is prohibited so keep these points in mind if you re a do it yourselfer.

For 10 second and slower cars that only need roll bars the size minimum is 1 3 4 o d.