Iron (grade 1)
1 Iron (grade 2) → 0.5 Gravel + 1 Iron (grade 1)
Compatible machines Impact crusher MK 01 · Impact crusher MK 02 · Impact crusher MK 03 · Impact crusher MK 04.
Research tier Logistic science pack. Iron processing - Stage 2
1 base seconds per batch. Fractional outputs are average yields.