Input: Iron Ingot 288/s Proliferator Mk3 Output: Steel 120/s
Pretty sure I did the math right. Maybe not, but uncertainty is next to godliness. It's symmetrical around an ILS, it's not quite tileable in the upper tropics, but hey, you came here for an easy copy-and-paste and it works. This is my first publicized blueprint - go make something better if you want, don't @ me.