Arc Furnace
[E1] x1 Iron = 5 Iron Ore
[E1] x5 Iron = 5 Iron Ore, 1 Wood
[E2] x1 Steel = 5 Iron
[E2] x8 Steel = 10 Iron, 1 Coal
[E2] x1 Rare Metals = 3 Rare Metals Ore, 1 Coal
[E3] x1 High Grade Steel = 5 Steel
[E3] x8 High Grade Steel = 10 Steel, 1 Rare Metals
[E3] x1 Super Alloys = 2 High Grade Steel, 2 Rare Metals, 1 Chemicals, 1 Uranium