Steel mill

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Cost
Cost	$150, 250x coal, 500x iron
Total Cost	$1,200
Production
Inputs	4x coal, 1x iron
Outputs	1x steel
Production interval	35 seconds
Production/Min	1.714x steel
Profit
Profit/Min	$13.71
Profit/Hour	$822.86
Return On Investment	0.744%
Aliases
steel mill, steelmill, steel furnace, steelfurnace

The steel mill is a facility that produces 1x steel every 35 seconds. Steel is used mainly for Construction Material rather than production input. The List of Buildings that use steel can be seen below.

1 Iron mine and 1 Coal mine can passively provide enough materials to support (1-2) steel mills.

Recommended build ratio is 4 Iron mine and 1 Coal mine for every 7 Steel mill.

For every 50x production it'll have 1 excessive Iron and for every 5x production, it will have 3 excessive Coal.
Excess material can be sold or stockpiled in case of bad regional modifiers.