Chromoly Vs Mild Steel

And wall thickness a chrome moly tube weighs the same as a mild steel tube.

Chromoly vs mild steel.

It was designed for and is used extensively in the aircraft industry due to it s high tensile. Chromoly falls under the the aisi 41xx designations and it is important to be aware of the different properties and applications of chromoly steel when deciding which material you need. This increased strength to weight ratio in chromoly allows for the use of thinner walled tubing to obtain the same structural support. Chromoly is a chrome alloy steel with a medium carbon content and 8 1 1 molybdenum for strength.

Chromoly steel is often used when more strength is required than that of mild carbon steel though it often comes at an increase in cost. Crome molly i have mild steel in my own car and all the dragsters are 4130 molly. 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. A common misconception is that chrome moly is lighter than mild steel.

Given the same o d. While you probably won t stress them out like we do i have seen them break while riding in the trailer. The most common source of argument surrounding the construction of a chromoly frame is the welding process. 4130 contains a higher amount of carbon than mild steel and is classified as a heat treatable steel.

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. One of the never ending topics of conversation is the use of 4130 steel over mild steel in professional drag racing builds. The dragsters usually have to be backhalved after so many laps. 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.