Chromoly Vs Mild Steel Chassis

Aluminum is the second most commonly used material for bicycle manufacturing.

Chromoly vs mild steel chassis.

When cost is a factor as for most of us mild steel is a good choice. 4130 is better due to the amount of weight savings you can have with it. I have a dragster frame and i don t know what it is made of. If anyone has a viable answer please let me know.

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. One of the never ending topics of conversation is the use of 4130 steel over mild steel in professional drag racing builds. It s lighter and stiffer than steel but it s also more brittle and easily damaged. In a trail rig like mine i will be using mild steel and a mig.

In this short video tim mcamis explains some of the differences between 4130 chromoly and mild steel tubing for use in drag race chassis construction. It will still save your life if done right. With dom 4130 and docol being the most common as many sanctioning bodies do not allow mild steel erw. In today s chassis it is common to find mild steel erw tubes high strength steels hss such as dom and 4130 chrome moly chromoly and advanced high strength steels ahss like docol tube r8.

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. 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.