The weight difference between a stainless and a steel car is now only about 15 pounds. Because of supply issues, we now use thicker stainless tubes (other than the main rails) in most of the other tubes in the car. The first stainless chassis were really light. Now, they are quite similar. We helped to make up for that with the new aluminum hood, trunk, and door frames. That saves about 20 pounds right now over the steel and stainless counterparts.
We use 304L stainless on our stainless chassis cars. The real difference is the stainless is really cool and the steel is much less expensive. Strengths are quite similar and stiffness is quite similar. Stainless just looks cooler. My new car is a stainless steel chassis car.
David
