Chromoly Vs Mild Steel

The dragsters usually have to be backhalved after so many laps.

Chromoly vs mild steel.

Given the same o d. One of the never ending topics of conversation is the use of 4130 steel over mild steel in professional drag racing builds. 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. 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.

This increased strength to weight ratio in chromoly allows for the use of thinner walled tubing to obtain the same structural support. A common misconception is that chrome moly is lighter than mild steel. Chrome moly is the abbreviation for chromium molybdenum and it is an alloy steel. 4130 contains a higher amount of carbon than mild steel and is classified as a heat treatable steel.

Crome molly i have mild steel in my own car and all the dragsters are 4130 molly. It was designed for and is used extensively in the aircraft industry due to it s high tensile. It is a steel that is stronger than carbon steel more commonly used in bike manufacturing so we can use thin wall tubing giving you a lightweight frame that will last through years of riding. 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.

And wall thickness a chrome moly tube weighs the same as a mild steel tube. The most common source of argument surrounding the construction of a chromoly frame is the welding process. Cage mild steel vs. 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.