# Stainless steel - Stage 1 (technology)

internal name `stainless-steel-mk01` · tier 4 (pY science pack 2, [tier 4](https://factorio.kalzumeus.com/tier/4.md))
HTML page: https://factorio.kalzumeus.com/tech/stainless-steel-mk01/

## Cost

900 units of (1 × [pY science pack 2](https://factorio.kalzumeus.com/item/py-science-pack-2.md), 2 × [Logistic science pack](https://factorio.kalzumeus.com/item/logistic-science-pack.md), 3 × [pY science pack 1](https://factorio.kalzumeus.com/item/py-science-pack-1.md), 6 × [Automation science pack](https://factorio.kalzumeus.com/item/automation-science-pack.md)), 90 s each.

## Requires (3)

- [Aramid](https://factorio.kalzumeus.com/tech/aramid.md)
- [Phosphorous processing](https://factorio.kalzumeus.com/tech/phosphorous-processing.md)
- [Steel - Stage 2](https://factorio.kalzumeus.com/tech/steel-mk02.md)

## Leads to (4)

- [Electronics - Stage 2](https://factorio.kalzumeus.com/tech/basic-electronics.md)
- [Electric energy distribution](https://factorio.kalzumeus.com/tech/electric-energy-distribution-3.md)
- [Small parts - Stage 2](https://factorio.kalzumeus.com/tech/small-parts-mk02.md)
- [Titanium processing - Stage 2](https://factorio.kalzumeus.com/tech/titanium-mk02.md)

## Unlocks (4 recipes)

### Ferrochrome (`fecr-alloy`)

- 3 s · tier 4
- Ingredients: 5 × [Iron plate](https://factorio.kalzumeus.com/item/iron-plate.md), 1 × [Chromium](https://factorio.kalzumeus.com/item/chromium.md), 3 × [Graphite](https://factorio.kalzumeus.com/item/graphite.md)
- Results: 2 × [Ferrochrome](https://factorio.kalzumeus.com/item/fecr-alloy.md)
- Made in: Smelter MK 01, Smelter MK 02, Smelter MK 03, Smelter MK 04
- Unlocked by: [Stainless steel - Stage 1](https://factorio.kalzumeus.com/tech/stainless-steel-mk01.md)

### Stainless steel (`hotair-stainless-steel`)

- 4 s · tier 4
- Ingredients: 2 × [Sand casting](https://factorio.kalzumeus.com/item/sand-casting.md), 1 × [Aramid fiber](https://factorio.kalzumeus.com/item/aramid.md), 100 × [Molten stainless steel](https://factorio.kalzumeus.com/fluid/molten-stainless-steel.md), 50 × [Hot air](https://factorio.kalzumeus.com/fluid/hot-air.md)
- Results: 13 × [Stainless steel](https://factorio.kalzumeus.com/item/stainless-steel.md)
- Made in: Casting unit MK 01, Casting unit MK 01 (Legacy), Casting unit MK 02, Casting unit MK 02 (Legacy), Casting unit MK 03, Casting unit MK 03 (Legacy), Casting unit MK 04, Casting unit MK 04 (Legacy)
- Unlocked by: [Stainless steel - Stage 1](https://factorio.kalzumeus.com/tech/stainless-steel-mk01.md)

### Molten stainless steel (`molten-stainless-steel`)

- 4 s · tier 4
- Ingredients: 100 × [Molten steel](https://factorio.kalzumeus.com/fluid/molten-steel.md), 1 × [Sulfur](https://factorio.kalzumeus.com/item/sulfur.md), 2 × [Copper plate](https://factorio.kalzumeus.com/item/copper-plate.md), 5 × [Nickel plate](https://factorio.kalzumeus.com/item/nickel-plate.md), 2 × [Niobium plate](https://factorio.kalzumeus.com/item/niobium-plate.md), 5 × [Ferrochrome](https://factorio.kalzumeus.com/item/fecr-alloy.md), 4 × [Phosphate rock](https://factorio.kalzumeus.com/item/phosphate-rock.md), 1 × [Cobalt extract](https://factorio.kalzumeus.com/item/cobalt-extract.md)
- Results: 50 × [Molten stainless steel](https://factorio.kalzumeus.com/fluid/molten-stainless-steel.md)
- Made in: Smelter MK 01, Smelter MK 02, Smelter MK 03, Smelter MK 04
- Unlocked by: [Stainless steel - Stage 1](https://factorio.kalzumeus.com/tech/stainless-steel-mk01.md)

### Stainless steel (`stainless-steel`)

- 4 s · tier 4
- Ingredients: 2 × [Sand casting](https://factorio.kalzumeus.com/item/sand-casting.md), 1 × [Aramid fiber](https://factorio.kalzumeus.com/item/aramid.md), 100 × [Molten stainless steel](https://factorio.kalzumeus.com/fluid/molten-stainless-steel.md)
- Results: 10 × [Stainless steel](https://factorio.kalzumeus.com/item/stainless-steel.md)
- Made in: Casting unit MK 01, Casting unit MK 01 (Legacy), Casting unit MK 02, Casting unit MK 02 (Legacy), Casting unit MK 03, Casting unit MK 03 (Legacy), Casting unit MK 04, Casting unit MK 04 (Legacy)
- Unlocked by: [Stainless steel - Stage 1](https://factorio.kalzumeus.com/tech/stainless-steel-mk01.md)