# Smelters - Stage 2 (technology) internal name `smelters-mk02` · tier 5 (Chemical science pack, [tier 5](https://factorio.kalzumeus.com/tier/5.md)) HTML page: https://factorio.kalzumeus.com/tech/smelters-mk02/ ## Cost 700 units of (1 × [Chemical science pack](https://factorio.kalzumeus.com/item/chemical-science-pack.md), 2 × [pY science pack 2](https://factorio.kalzumeus.com/item/py-science-pack-2.md), 3 × [Logistic science pack](https://factorio.kalzumeus.com/item/logistic-science-pack.md), 6 × [pY science pack 1](https://factorio.kalzumeus.com/item/py-science-pack-1.md), 10 × [Automation science pack](https://factorio.kalzumeus.com/item/automation-science-pack.md)), 120 s each. ## Requires (1) - [Chemical science pack](https://factorio.kalzumeus.com/tech/chemical-science-pack.md) ## Leads to (1) - [Smelters - Stage 3](https://factorio.kalzumeus.com/tech/smelters-mk03.md) ## Unlocks (4 recipes) ### Basic oxygen furnace MK 02 (`bof-mk02`) - 2 s · tier 5 - Ingredients: 1 × [Basic oxygen furnace MK 01](https://factorio.kalzumeus.com/item/bof-mk01.md), 15 × [Duralumin](https://factorio.kalzumeus.com/item/duralumin.md), 10 × [Lead plate](https://factorio.kalzumeus.com/item/lead-plate.md), 5 × [Engine unit](https://factorio.kalzumeus.com/item/engine-unit.md), 15 × [Nexelit plate](https://factorio.kalzumeus.com/item/nexelit-plate.md), 10 × [Complex circuit board](https://factorio.kalzumeus.com/item/advanced-circuit.md), 10 × [Advanced small parts](https://factorio.kalzumeus.com/item/small-parts-02.md), 10 × [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 × [Basic oxygen furnace MK 02](https://factorio.kalzumeus.com/item/bof-mk02.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 2](https://factorio.kalzumeus.com/tech/smelters-mk02.md) ### Electric arc furnace MK 02 (`eaf-mk02`) - 2 s · tier 5 - Ingredients: 1 × [Electric arc furnace MK 01](https://factorio.kalzumeus.com/item/eaf-mk01.md), 15 × [Duralumin](https://factorio.kalzumeus.com/item/duralumin.md), 10 × [Lead plate](https://factorio.kalzumeus.com/item/lead-plate.md), 10 × [Engine unit](https://factorio.kalzumeus.com/item/engine-unit.md), 10 × [Nexelit plate](https://factorio.kalzumeus.com/item/nexelit-plate.md), 20 × [Complex circuit board](https://factorio.kalzumeus.com/item/advanced-circuit.md), 10 × [Advanced small parts](https://factorio.kalzumeus.com/item/small-parts-02.md), 6 × [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 × [Electric arc furnace MK 02](https://factorio.kalzumeus.com/item/eaf-mk02.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 2](https://factorio.kalzumeus.com/tech/smelters-mk02.md) ### High pressure furnace MK 02 (`hpf-mk02`) - 2 s · tier 5 - Ingredients: 1 × [High pressure furnace MK 01](https://factorio.kalzumeus.com/item/hpf.md), 10 × [Nexelit plate](https://factorio.kalzumeus.com/item/nexelit-plate.md), 10 × [Complex circuit board](https://factorio.kalzumeus.com/item/advanced-circuit.md), 15 × [Steel plate](https://factorio.kalzumeus.com/item/steel-plate.md), 10 × [Concrete](https://factorio.kalzumeus.com/item/concrete.md), 30 × [Duralumin](https://factorio.kalzumeus.com/item/duralumin.md), 30 × [Tin plate](https://factorio.kalzumeus.com/item/tin-plate.md), 8 × [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 × [High pressure furnace MK 02](https://factorio.kalzumeus.com/item/hpf-mk02.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 2](https://factorio.kalzumeus.com/tech/smelters-mk02.md) ### Smelter MK 02 (`smelter-mk02`) - 2 s · tier 5 - Ingredients: 1 × [Smelter MK 01](https://factorio.kalzumeus.com/item/smelter-mk01.md), 30 × [Duralumin](https://factorio.kalzumeus.com/item/duralumin.md), 40 × [Lead plate](https://factorio.kalzumeus.com/item/lead-plate.md), 15 × [Nexelit plate](https://factorio.kalzumeus.com/item/nexelit-plate.md), 10 × [Complex circuit board](https://factorio.kalzumeus.com/item/advanced-circuit.md), 20 × [Engine unit](https://factorio.kalzumeus.com/item/engine-unit.md), 50 × [Ceramic](https://factorio.kalzumeus.com/item/ceramic.md), 15 × [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 × [Smelter MK 02](https://factorio.kalzumeus.com/item/smelter-mk02.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 2](https://factorio.kalzumeus.com/tech/smelters-mk02.md)