# Smelters - Stage 3 (technology) internal name `smelters-mk03` · tier 7 (Production science pack, [tier 7](https://factorio.kalzumeus.com/tier/7.md)) HTML page: https://factorio.kalzumeus.com/tech/smelters-mk03/ ## Cost 1600 units of (1 × [Production science pack](https://factorio.kalzumeus.com/item/production-science-pack.md), 2 × [pY science pack 3](https://factorio.kalzumeus.com/item/py-science-pack-3.md), 3 × [Chemical science pack](https://factorio.kalzumeus.com/item/chemical-science-pack.md), 6 × [pY science pack 2](https://factorio.kalzumeus.com/item/py-science-pack-2.md), 10 × [Logistic science pack](https://factorio.kalzumeus.com/item/logistic-science-pack.md), 20 × [pY science pack 1](https://factorio.kalzumeus.com/item/py-science-pack-1.md), 30 × [Automation science pack](https://factorio.kalzumeus.com/item/automation-science-pack.md), 6 × [Military science pack](https://factorio.kalzumeus.com/item/military-science-pack.md)), 300 s each. ## Requires (3) - [Alloy smelting - Stage 4](https://factorio.kalzumeus.com/tech/alloys-mk04.md) - [Smelters - Stage 2](https://factorio.kalzumeus.com/tech/smelters-mk02.md) - [Superconductor](https://factorio.kalzumeus.com/tech/superconductor.md) ## Leads to (2) - [BioFET](https://factorio.kalzumeus.com/tech/biofet.md) - [Zinc oxide nanoparticles](https://factorio.kalzumeus.com/tech/zno-nanoparticles.md) ## Unlocks (5 recipes) ### Basic oxygen furnace MK 03 (`bof-mk03`) - 2 s · tier 7 - Ingredients: 1 × [Basic oxygen furnace MK 02](https://factorio.kalzumeus.com/item/bof-mk02.md), 20 × [Titanium plate](https://factorio.kalzumeus.com/item/titanium-plate.md), 20 × [Super steel](https://factorio.kalzumeus.com/item/super-steel.md), 5 × [Electric engine unit](https://factorio.kalzumeus.com/item/electric-engine-unit.md), 20 × [Glass](https://factorio.kalzumeus.com/item/glass.md), 20 × [Tin plate](https://factorio.kalzumeus.com/item/tin-plate.md), 10 × [High tech circuit board](https://factorio.kalzumeus.com/item/processing-unit.md), 20 × [Niobium titanium alloy](https://factorio.kalzumeus.com/item/nbti-alloy.md), 20 × [Heavy fermion material](https://factorio.kalzumeus.com/item/heavy-fermion.md), 20 × [Carbon aerogel](https://factorio.kalzumeus.com/item/carbon-aerogel.md), 15 × [Graphene roll](https://factorio.kalzumeus.com/item/graphene-roll.md), 10 × [Special small parts](https://factorio.kalzumeus.com/item/small-parts-03.md), 10 × [Nano Structured Material](https://factorio.kalzumeus.com/item/ns-material.md), 1 × [Mechanical Parts 02](https://factorio.kalzumeus.com/item/mechanical-parts-02.md) - Results: 1 × [Basic oxygen furnace MK 03](https://factorio.kalzumeus.com/item/bof-mk03.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 3](https://factorio.kalzumeus.com/tech/smelters-mk03.md) ### Electric arc furnace MK 03 (`eaf-mk03`) - 2 s · tier 7 - Ingredients: 1 × [Electric arc furnace MK 02](https://factorio.kalzumeus.com/item/eaf-mk02.md), 20 × [Titanium plate](https://factorio.kalzumeus.com/item/titanium-plate.md), 20 × [Stainless steel](https://factorio.kalzumeus.com/item/stainless-steel.md), 20 × [Tin plate](https://factorio.kalzumeus.com/item/tin-plate.md), 6 × [Electric engine unit](https://factorio.kalzumeus.com/item/electric-engine-unit.md), 10 × [High tech circuit board](https://factorio.kalzumeus.com/item/processing-unit.md), 20 × [Niobium titanium alloy](https://factorio.kalzumeus.com/item/nbti-alloy.md), 10 × [Paramagnetic material](https://factorio.kalzumeus.com/item/paramagnetic-material.md), 5 × [Superconductor](https://factorio.kalzumeus.com/item/superconductor.md), 20 × [Cobalt chromium alloy](https://factorio.kalzumeus.com/item/crco-alloy.md), 10 × [Special small parts](https://factorio.kalzumeus.com/item/small-parts-03.md), 6 × [Nano Structured Material](https://factorio.kalzumeus.com/item/ns-material.md), 1 × [Mechanical Parts 02](https://factorio.kalzumeus.com/item/mechanical-parts-02.md) - Results: 1 × [Electric arc furnace MK 03](https://factorio.kalzumeus.com/item/eaf-mk03.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 3](https://factorio.kalzumeus.com/tech/smelters-mk03.md) ### High pressure furnace MK 03 (`hpf-mk03`) - 3 s · tier 7 - Ingredients: 1 × [High pressure furnace MK 02](https://factorio.kalzumeus.com/item/hpf-mk02.md), 1 × [Electric engine unit](https://factorio.kalzumeus.com/item/electric-engine-unit.md), 10 × [Kevlar](https://factorio.kalzumeus.com/item/kevlar.md), 5 × [High tech circuit board](https://factorio.kalzumeus.com/item/processing-unit.md), 10 × [Niobium pipe](https://factorio.kalzumeus.com/item/niobium-pipe.md), 20 × [Titanium plate](https://factorio.kalzumeus.com/item/titanium-plate.md), 15 × [Stainless steel](https://factorio.kalzumeus.com/item/stainless-steel.md), 20 × [Niobium titanium alloy](https://factorio.kalzumeus.com/item/nbti-alloy.md), 1 × [Heat exchanger MK01](https://factorio.kalzumeus.com/item/py-heat-exchanger.md), 15 × [Phosphate glass](https://factorio.kalzumeus.com/item/phosphate-glass.md), 10 × [Heavy fermion material](https://factorio.kalzumeus.com/item/heavy-fermion.md), 10 × [Carbon aerogel](https://factorio.kalzumeus.com/item/carbon-aerogel.md), 8 × [Nano Structured Material](https://factorio.kalzumeus.com/item/ns-material.md), 1 × [Mechanical Parts 02](https://factorio.kalzumeus.com/item/mechanical-parts-02.md) - Results: 1 × [High pressure furnace MK 03](https://factorio.kalzumeus.com/item/hpf-mk03.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 3](https://factorio.kalzumeus.com/tech/smelters-mk03.md) ### Sinter plant (`sinter-unit`) - 2 s · tier 7 - Ingredients: 200 × [Titanium plate](https://factorio.kalzumeus.com/item/titanium-plate.md), 50 × [Super steel](https://factorio.kalzumeus.com/item/super-steel.md), 10 × [Electric engine unit](https://factorio.kalzumeus.com/item/electric-engine-unit.md), 1 × [Advanced foundry MK 02](https://factorio.kalzumeus.com/item/advanced-foundry-mk02.md), 25 × [Complex circuit board](https://factorio.kalzumeus.com/item/advanced-circuit.md), 15 × [Stainless steel](https://factorio.kalzumeus.com/item/stainless-steel.md), 20 × [Carbon aerogel](https://factorio.kalzumeus.com/item/carbon-aerogel.md), 20 × [Self assembly monolayer material](https://factorio.kalzumeus.com/item/self-assembly-monolayer.md), 1 × [Mechanical Parts 01](https://factorio.kalzumeus.com/item/mechanical-parts-01.md) - Results: 1 × [Sinter plant](https://factorio.kalzumeus.com/item/sinter-unit.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 3](https://factorio.kalzumeus.com/tech/smelters-mk03.md) ### Smelter MK 03 (`smelter-mk03`) - 3 s · tier 7 - Ingredients: 1 × [Smelter MK 02](https://factorio.kalzumeus.com/item/smelter-mk02.md), 3 × [Storage tank](https://factorio.kalzumeus.com/item/storage-tank.md), 30 × [Duralumin](https://factorio.kalzumeus.com/item/duralumin.md), 30 × [Lead plate](https://factorio.kalzumeus.com/item/lead-plate.md), 20 × [Nexelit plate](https://factorio.kalzumeus.com/item/nexelit-plate.md), 20 × [Electric engine unit](https://factorio.kalzumeus.com/item/electric-engine-unit.md), 10 × [High tech circuit board](https://factorio.kalzumeus.com/item/processing-unit.md), 15 × [Niobium titanium alloy](https://factorio.kalzumeus.com/item/nbti-alloy.md), 20 × [Boron carbide](https://factorio.kalzumeus.com/item/boron-carbide.md), 1 × [Heat exchanger MK01](https://factorio.kalzumeus.com/item/py-heat-exchanger.md), 20 × [Heavy fermion material](https://factorio.kalzumeus.com/item/heavy-fermion.md), 20 × [Carbon aerogel](https://factorio.kalzumeus.com/item/carbon-aerogel.md), 15 × [Graphene roll](https://factorio.kalzumeus.com/item/graphene-roll.md), 15 × [Nano Structured Material](https://factorio.kalzumeus.com/item/ns-material.md), 1 × [Mechanical Parts 02](https://factorio.kalzumeus.com/item/mechanical-parts-02.md) - Results: 1 × [Smelter MK 03](https://factorio.kalzumeus.com/item/smelter-mk03.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 3](https://factorio.kalzumeus.com/tech/smelters-mk03.md)