Quote Originally Posted by WindingRoad View Post
It's probably going to vary alot depending of what steel they use.
...and depending on what parts you use for the build.
For example I own a 9 years old steel Bianchi (the Eros, so not the lightest steel Bianchi on the catalog). I stripped down that frame and rebuilt with all lightweight components as soon as it got home from the shop. The weight out of the shop was like 23-24 lbs, and is down to 17.5 or so with my configuration - which is lighter than many aluminum bikes out of the shop. Actually, it is lighter than some lower-end carbon bikes right out of the shop as well.
The frame is only part of the weight - the components contribute way more to the final numbers. If you want to build a lightweight bike, find lightweight group and wheels. Replace alloy/steel components with carbon and titanium - and that will lower your final weight drastically.
Good luck