# Copper (grade 4)

Pyanodons item · internal name `grade-4-copper` · stack size 100 · first craftable in tier 2 (Logistic science pack, [tier 2](https://factorio.kalzumeus.com/tier/2.md))
HTML page: https://factorio.kalzumeus.com/item/grade-4-copper/

## Produced by (2 recipes)

### Copper (grade 4) (`grade-4-copper`)

- 2.5 s · tier 2
- Ingredients: 2 × [Copper (grade 3)](https://factorio.kalzumeus.com/item/grade-3-copper.md)
- Results: 1 × [Copper (grade 4)](https://factorio.kalzumeus.com/item/grade-4-copper.md), 2 × [Low grade copper rejects](https://factorio.kalzumeus.com/item/low-grade-rejects.md)
- Made in: Automated screener MK 01, Automated screener MK 02, Automated screener MK 03, Automated screener MK 04
- Unlocked by: [Copper processing - Stage 2](https://factorio.kalzumeus.com/tech/copper-mk02.md)

### Copper (grade 4) (`classify-low-grade`)

- 2 s · tier 2
- Ingredients: 4 × [Low grade copper rejects](https://factorio.kalzumeus.com/item/low-grade-rejects.md)
- Results: 0.3 × [Copper (grade 4)](https://factorio.kalzumeus.com/item/grade-4-copper.md) (30% chance), 1 × [Low grade copper dust](https://factorio.kalzumeus.com/item/copper-low-dust.md)
- Made in: Classifier MK 01, Classifier MK 01 (Legacy), Classifier MK 02, Classifier MK 02 (Legacy), Classifier MK 03, Classifier MK 03 (Legacy), Classifier MK 04, Classifier MK 04 (Legacy)
- Unlocked by: [Copper processing - Stage 2](https://factorio.kalzumeus.com/tech/copper-mk02.md)

## Used in (3 recipes)

- Molten copper (`molten-copper-04`, tier 2) → [Molten copper](https://factorio.kalzumeus.com/fluid/molten-copper.md)
- Copper solution (`copper-solution`, tier 5) → [Copper solution](https://factorio.kalzumeus.com/fluid/copper-solution.md)
- Dimethyldichlorosilane (`dimethyldichlorosilane`, tier 5) → [Dimethyldichlorosilane](https://factorio.kalzumeus.com/fluid/dimethyldichlorosilane.md)