I doubt the corrosion and maintenance problems would be worth it. Most steam turbines operate on superheated steam, I vaguely recall 1200°C and 100 atmospheres of pressure being a working starting point for a lot of problems in college. Low pressure turbines are a thing, but that's not where you get most of the power. They're often, as much as anything, in place to draw down energy in the steam before sending it to the condenser.

https://www.steamtablesonline.com/

To get steam at 70°C you would have to draw a vacuum on the system. I see this ending expensively.