Chrome-moly vs mild steel for cage

[wmhjr]

Be careful with that... SOME sanctioning bodies allow thinner wall tubing for 4130 material. Others do not specify material, only size and wall. In that case there is actually a weight gain with 4130. Also, 4130 is much more easily damaged by overheating during the welding process. Unless you are a good TIG welder, you're probably better off saying with mild steel.

If you are not building to any particular set of competition rules, you will probably be safe with 1 1/2"X.065 wall (4130) tubing gusseted directly to the body structure. In that case, the weight savings are significant.

+1



Different sanctioning bodies often have different requirements. You need a good chassis builder and knowledge of exactly how and where you plan to use the build in order to come up with your answers.