The history of how steel got cheap is not really capital-based. It wasn't done by throwing money at the problem, not until the technology worked. The Bessemer Converter was a simple, but touchy beast. The Romans could have built one, but it wouldn't have worked. The metallurgy hadn't been figured out, and the quantitative analysis needed to get repeatability had to be developed. Once it was possible to know what was going into the process, repeatability was possible. Then it took a lot of trial and error, about 10,000 heats. Finally, consistently good steel emerged.
That's when capitalism took over and scaled it up. The technological progress preceded the funding.