# Smelters - Stage 4 (technology) internal name `smelters-mk04` · tier 10 (Space science pack, [tier 10](https://factorio.kalzumeus.com/tier/10.md)) HTML page: https://factorio.kalzumeus.com/tech/smelters-mk04/ ## Cost 3600 units of (1 × [Space science pack](https://factorio.kalzumeus.com/item/space-science-pack.md), 2 × [Utility science pack](https://factorio.kalzumeus.com/item/utility-science-pack.md), 3 × [pY science pack 4](https://factorio.kalzumeus.com/item/py-science-pack-4.md), 6 × [Production science pack](https://factorio.kalzumeus.com/item/production-science-pack.md), 10 × [pY science pack 3](https://factorio.kalzumeus.com/item/py-science-pack-3.md), 20 × [Chemical science pack](https://factorio.kalzumeus.com/item/chemical-science-pack.md), 30 × [pY science pack 2](https://factorio.kalzumeus.com/item/py-science-pack-2.md), 60 × [Logistic science pack](https://factorio.kalzumeus.com/item/logistic-science-pack.md), 100 × [pY science pack 1](https://factorio.kalzumeus.com/item/py-science-pack-1.md), 200 × [Automation science pack](https://factorio.kalzumeus.com/item/automation-science-pack.md), 30 × [Military science pack](https://factorio.kalzumeus.com/item/military-science-pack.md)), 1200 s each. ## Requires (1) - [Quantum computing](https://factorio.kalzumeus.com/tech/space-science-pack.md) ## Leads to (1) - [Pyrrhic victory](https://factorio.kalzumeus.com/tech/pyrrhic.md) ## Unlocks (4 recipes) ### Basic oxygen furnace MK 04 (`bof-mk04`) - 2 s · tier 10 - Ingredients: 1 × [Basic oxygen furnace MK 03](https://factorio.kalzumeus.com/item/bof-mk03.md), 15 × [Concrete](https://factorio.kalzumeus.com/item/concrete.md), 30 × [Super steel](https://factorio.kalzumeus.com/item/super-steel.md), 10 × [Glass](https://factorio.kalzumeus.com/item/glass.md), 10 × [Low density structure](https://factorio.kalzumeus.com/item/low-density-structure.md), 10 × [Iron niobium alloy](https://factorio.kalzumeus.com/item/nbfe-alloy.md), 10 × [Super alloy](https://factorio.kalzumeus.com/item/super-alloy.md), 30 × [Boron carbide](https://factorio.kalzumeus.com/item/boron-carbide.md), 1 × [Advanced coating](https://factorio.kalzumeus.com/item/science-coating.md), 5 × [Intelligent unit](https://factorio.kalzumeus.com/item/intelligent-unit.md), 5 × [Superconductor servomechanisms](https://factorio.kalzumeus.com/item/superconductor-servomechanims.md), 10 × [Harmonic absorber](https://factorio.kalzumeus.com/item/harmonic-absorber.md), 10 × [Metastable Quasicrystal](https://factorio.kalzumeus.com/item/metastable-quasicrystal.md), 3 × [Superconducting Claw-pole Engine](https://factorio.kalzumeus.com/item/sc-engine.md), 1 × [Mechanical Parts 04](https://factorio.kalzumeus.com/item/mechanical-parts-04.md) - Results: 1 × [Basic oxygen furnace MK 04](https://factorio.kalzumeus.com/item/bof-mk04.md) - Made in: Burner assembling machine MK 01, Burner assembling machine MK 02, Burner assembling machine MK 03, Automated factory MK 01, Automated factory MK 02, Automated factory MK 03, Automated factory MK 04, Character, Character (flying), Mutagenic infusion, (flying) - Unlocked by: [Smelters - Stage 4](https://factorio.kalzumeus.com/tech/smelters-mk04.md) ### Electric arc furnace MK 04 (`eaf-mk04`) - 2 s · tier 10 - Ingredients: 1 × [Electric arc furnace MK 03](https://factorio.kalzumeus.com/item/eaf-mk03.md), 15 × [Concrete](https://factorio.kalzumeus.com/item/concrete.md), 30 × [Super steel](https://factorio.kalzumeus.com/item/super-steel.md), 10 × [Low density structure](https://factorio.kalzumeus.com/item/low-density-structure.md), 10 × [Iron niobium alloy](https://factorio.kalzumeus.com/item/nbfe-alloy.md), 10 × [Super alloy](https://factorio.kalzumeus.com/item/super-alloy.md), 30 × [Boron carbide](https://factorio.kalzumeus.com/item/boron-carbide.md), 1 × [Advanced coating](https://factorio.kalzumeus.com/item/science-coating.md), 5 × [Intelligent unit](https://factorio.kalzumeus.com/item/intelligent-unit.md), 5 × [Superconductor servomechanisms](https://factorio.kalzumeus.com/item/superconductor-servomechanims.md), 5 × [Quantum dots](https://factorio.kalzumeus.com/item/quantum-dots.md), 6 × [Metastable Quasicrystal](https://factorio.kalzumeus.com/item/metastable-quasicrystal.md), 2 × [Superconducting Claw-pole Engine](https://factorio.kalzumeus.com/item/sc-engine.md), 1 × [Mechanical Parts 04](https://factorio.kalzumeus.com/item/mechanical-parts-04.md) - Results: 1 × [Electric arc furnace MK 04](https://factorio.kalzumeus.com/item/eaf-mk04.md) - Made in: Burner assembling machine MK 01, Burner assembling machine MK 02, Burner assembling machine MK 03, Automated factory MK 01, Automated factory MK 02, Automated factory MK 03, Automated factory MK 04, Character, Character (flying), Mutagenic infusion, (flying) - Unlocked by: [Smelters - Stage 4](https://factorio.kalzumeus.com/tech/smelters-mk04.md) ### High pressure furnace MK 04 (`hpf-mk04`) - 4 s · tier 10 - Ingredients: 1 × [High pressure furnace MK 03](https://factorio.kalzumeus.com/item/hpf-mk03.md), 20 × [Low density structure](https://factorio.kalzumeus.com/item/low-density-structure.md), 10 × [Iron niobium alloy](https://factorio.kalzumeus.com/item/nbfe-alloy.md), 30 × [Super steel](https://factorio.kalzumeus.com/item/super-steel.md), 30 × [Super alloy](https://factorio.kalzumeus.com/item/super-alloy.md), 5 × [Wall shield](https://factorio.kalzumeus.com/item/wall-shield.md), 2 × [Advanced coating](https://factorio.kalzumeus.com/item/science-coating.md), 5 × [Intelligent unit](https://factorio.kalzumeus.com/item/intelligent-unit.md), 6 × [Superconductor servomechanisms](https://factorio.kalzumeus.com/item/superconductor-servomechanims.md), 4 × [Quantum vortex storage system](https://factorio.kalzumeus.com/item/quantum-vortex-storage-system.md), 8 × [Metastable Quasicrystal](https://factorio.kalzumeus.com/item/metastable-quasicrystal.md), 3 × [Superconducting Claw-pole Engine](https://factorio.kalzumeus.com/item/sc-engine.md), 1 × [Mechanical Parts 04](https://factorio.kalzumeus.com/item/mechanical-parts-04.md) - Results: 1 × [High pressure furnace MK 04](https://factorio.kalzumeus.com/item/hpf-mk04.md) - Made in: Burner assembling machine MK 01, Burner assembling machine MK 02, Burner assembling machine MK 03, Automated factory MK 01, Automated factory MK 02, Automated factory MK 03, Automated factory MK 04, Character, Character (flying), Mutagenic infusion, (flying) - Unlocked by: [Smelters - Stage 4](https://factorio.kalzumeus.com/tech/smelters-mk04.md) ### Smelter MK 04 (`smelter-mk04`) - 4 s · tier 10 - Ingredients: 1 × [Smelter MK 03](https://factorio.kalzumeus.com/item/smelter-mk03.md), 30 × [Super steel](https://factorio.kalzumeus.com/item/super-steel.md), 15 × [Low density structure](https://factorio.kalzumeus.com/item/low-density-structure.md), 20 × [Iron niobium alloy](https://factorio.kalzumeus.com/item/nbfe-alloy.md), 20 × [Super alloy](https://factorio.kalzumeus.com/item/super-alloy.md), 2 × [Wall shield](https://factorio.kalzumeus.com/item/wall-shield.md), 1 × [Advanced coating](https://factorio.kalzumeus.com/item/science-coating.md), 5 × [Intelligent unit](https://factorio.kalzumeus.com/item/intelligent-unit.md), 5 × [Superconductor servomechanisms](https://factorio.kalzumeus.com/item/superconductor-servomechanims.md), 10 × [Harmonic absorber](https://factorio.kalzumeus.com/item/harmonic-absorber.md), 15 × [Metastable Quasicrystal](https://factorio.kalzumeus.com/item/metastable-quasicrystal.md), 4 × [Superconducting Claw-pole Engine](https://factorio.kalzumeus.com/item/sc-engine.md), 1 × [Mechanical Parts 04](https://factorio.kalzumeus.com/item/mechanical-parts-04.md) - Results: 1 × [Smelter MK 04](https://factorio.kalzumeus.com/item/smelter-mk04.md) - Made in: Burner assembling machine MK 01, Burner assembling machine MK 02, Burner assembling machine MK 03, Automated factory MK 01, Automated factory MK 02, Automated factory MK 03, Automated factory MK 04, Character, Character (flying), Mutagenic infusion, (flying) - Unlocked by: [Smelters - Stage 4](https://factorio.kalzumeus.com/tech/smelters-mk04.md)