Steel furnace
The steel furnace is the second-tier of furnaces. Compared to the stone furnace, it smelts at double the speed and therefore is a more efficient use of the given fuel. Steel furnace is comparable to electric furnace in terms of smelt speed, however the latter can make use of modules (as well as electricity) to further enhance the furnace's capabilities.
Ingredients: 6× Steel plate10× Stone brick
Output: 1 per craft → 20/min (single machine, no modules)
