# Solder - Stage 2 (technology)

internal name `solder-mk02` · tier 2 (Logistic science pack, [tier 2](https://factorio.kalzumeus.com/tier/2.md))
HTML page: https://factorio.kalzumeus.com/tech/solder-mk02/

## Cost

175 units of (1 × [Logistic science pack](https://factorio.kalzumeus.com/item/logistic-science-pack.md), 2 × [pY science pack 1](https://factorio.kalzumeus.com/item/py-science-pack-1.md), 3 × [Automation science pack](https://factorio.kalzumeus.com/item/automation-science-pack.md)), 60 s each.

## Requires (2)

- [Lead processing - Stage 2](https://factorio.kalzumeus.com/tech/lead-mk02.md)
- [Tin processing - Stage 2](https://factorio.kalzumeus.com/tech/tin-mk02.md)

## Leads to (2)

- [Casting - Stage 2](https://factorio.kalzumeus.com/tech/casting-mk02.md)
- [Solder - Stage 3](https://factorio.kalzumeus.com/tech/solder-mk03.md)

## Unlocks (4 recipes)

### Solder (`hotair-solder`)

- 4 s · tier 2
- Ingredients: 50 × [Molten solder](https://factorio.kalzumeus.com/fluid/molten-solder.md), 50 × [Hot air](https://factorio.kalzumeus.com/fluid/hot-air.md)
- Results: 7 × [Solder](https://factorio.kalzumeus.com/item/solder.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: [Solder - Stage 2](https://factorio.kalzumeus.com/tech/solder-mk02.md)

### Molten solder (`molten-solder-0`)

- 4 s · tier 2
- Ingredients: 10 × [Molten tin](https://factorio.kalzumeus.com/fluid/molten-tin.md), 20 × [Molten lead](https://factorio.kalzumeus.com/fluid/molten-lead.md)
- Results: 20 × [Molten solder](https://factorio.kalzumeus.com/fluid/molten-solder.md)
- Made in: Basic oxygen furnace MK 01, Basic oxygen furnace MK 02, Basic oxygen furnace MK 03, Basic oxygen furnace MK 04
- Unlocked by: [Solder - Stage 2](https://factorio.kalzumeus.com/tech/solder-mk02.md)

### Molten solder (`molten-solder-1`)

- 2 s · tier 2
- Ingredients: 10 × [Molten tin](https://factorio.kalzumeus.com/fluid/molten-tin.md), 20 × [Molten lead](https://factorio.kalzumeus.com/fluid/molten-lead.md), 30 × [Tar](https://factorio.kalzumeus.com/fluid/tar.md)
- Results: 40 × [Molten solder](https://factorio.kalzumeus.com/fluid/molten-solder.md)
- Made in: Basic oxygen furnace MK 01, Basic oxygen furnace MK 02, Basic oxygen furnace MK 03, Basic oxygen furnace MK 04
- Unlocked by: [Solder - Stage 2](https://factorio.kalzumeus.com/tech/solder-mk02.md)

### Solder (`solder`)

- 4 s · tier 2
- Ingredients: 50 × [Molten solder](https://factorio.kalzumeus.com/fluid/molten-solder.md)
- Results: 5 × [Solder](https://factorio.kalzumeus.com/item/solder.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: [Solder - Stage 2](https://factorio.kalzumeus.com/tech/solder-mk02.md)