I may have mis-communicated. We're looking to brand our parts sales business, not the corporation. "Railcar Parts," or "Railcar Components" needs to be incorporated. The concepts presented with a medallion would be great for a mobile device and a medallion with Railcar Parts, (or Components) to the side is great for our website and print literature.
The concept with the wheels is good, but already used by another company in our industry.