Oh right.
But we are using Offensive Policy, so worst case the provinces take care of it.
@veekie
I did some quick reading. From the looks of it, we are still using Bloomeries. While it is possible we can jump to steel with LoW, Arsenal and a Heroic Mystic, the more likely result is that we get pig iron and the process to make it into wrought iron, which would boost production speed tremendously.
For those that don't want to read up on iron working techniques:
(And I may have misunderstood some parts, but the gist of it should hold true)
Bloom Iron is basically a big iron sponge that forms in a blast furnace where the impurities are hammered out by our new trip hammers. Forging is done on site by hand, which is very labour intensive as you have to reheat it constantly as you hammer it into shape.
Pig Iron is achieved by getting the temperatures high enough to outright melt the iron, keep it liquid and pour it into forms. Usually sand forms. Pig iron itself is fairly useless for the military, but may have some uses in construction. The next step is important.
Wrought Iron is basically taking the pig iron, roasting it and using oxygen to get rid of impurities. You can then add carbon to make it into steel and pour it into a prepared form to have an instant sword. Taking minutes for this part instead of hours.
The big leap (even without steel) is that the processing can be split up and specialized, allowing for higher throughput as you don't have to beat the shit out of a chunk of iron all day and instead do it as with bronze, pour it into a prepared form and just give it a finish.
The leap to steel here is fairly short. You just need to get carbon to 1-2%. Or at least realize that you get something awesome in that case.