Atomcraft Reactions Cheatsheet

Use this Atomcraft cheatsheet when a forge is hot and your memory is not. It compresses the recipes expanded in Early Game Materials, Ores and Smelting, and Rare Elements. For physical layouts, open Builds; for tutorials, open Guides.

How to Read This Sheet

Each line assumes sorted reagents, adequate containment, and appropriate heat. If a line fails, debug temperature, contact, and contamination before assuming the wiki is wrong. Pipette with Left-Ctrl, pin ores in F1 Help, and keep Charcoal topped up.

Ignition and Fuel

Reaction / process	Inputs	Output / notes
Firestarter chain	Flint, Pyrite (surface)	Ignition for campfires and forges
Charcoal	Wood piles + fire	Primary early forge fuel
Glass	Sand + melt heat	Clear structural / vessel material

Soft Metals and Alloys

Reaction / process	Inputs	Output / notes
Copper smelt	Cuprite + heat	Copper
Tin smelt	Cassiterite + heat	Tin
Bronze alloy	Copper + Tin	Mid hardness tools
Iron smelt	Hematite + heat	Iron
Steel	Carbon into molten Iron	Premium tools / structures
Lead path	Galena processing	Lead

Acids

Reaction / process	Inputs	Output / notes
Sulfuric Acid	Sulfur + Water	Gateway acid
HF pathway	Sulfuric Acid + Fluorite	Unlocks Columbite processing

Store acids in dedicated basins. Never pipette from an acid pool into a food or water stock without washing the selection habit out of your hands — meaning: consciously reselect materials.

High Temperature Reductions

Reaction / process	Inputs	Output / notes
Aluminum line	Bauxite → Alumina → Carbon reduce ~2300 K	Aluminum
Silicon	Sand + Carbon at ~2500–3000 K	Silicon
Chromium line	Chromite → Ferrochrome + Aluminum step	Chromium

These are session-length projects. Clear your schedule, stock carbon, and verify forge geometry from Builds before lighting the long burn.

Specialty Minerals

Target	Source / path	Notes
Silver / Gold	Sylvanite	Pin the ore, not only the metals
Cobalt	Cobaltite	Mid-late discovery
Vanadium	Vanadinite	Process after mining
Germanium	Mine Sphalerite	Easy to overlook
Mercury	Near coal	Watch side pockets
Rubies	Limestone caves	Hardness gated
Borax	Buried City	Expedition item
Lithium	Lepidolite path	Multi-step
Ta / Nb	Columbite + HF	Acid gated
Noble gases	Cooling Element structures	Engineered harvest

Launch-Window Acid and Reclaim Reactions (July 2026)

Reaction / process	Inputs	Output / notes
Hydrobromic Acid	Hydrogen Bromide + H2O	Gateway bromine acid
Manganese reclaim	Manganese(II) Oxide / Chloride / Sulfate routes	Fixes dead-end manganese compounds

These landed during the July 2026 launch window alongside Material Tracking. Hydrobromic Acid extends the acid ladder past Sulfuric → HF; manganese reclaim routes rescue oxide, chloride, and sulfate dead ends that otherwise stall mid-game chemistry.

Post-launch reaction updates (late July 2026)

Reaction / process	Inputs	Output / notes
Grass Seed	Mine from Grass	Plant on Dirt or Loam
Vanadium extract	Vanadium Dioxide + Molten Aluminum	Easier heat-range path
Granite dissolve	Sulfuric Acid + Water (gravel)	Granite gravel pathway
Alumina / Corundum	Corundum Walls → Alumina; Alumina → Corundum Walls	Molten Glass→Molten Silica cleanup

Grass Seed gives a renewable planting loop once surface Grass is mined. Vanadium extract lowers the temperature window compared to older Vanadinite-only assumptions. Granite gravel via acid plus water opens a gravel route for builds that need coarse aggregate. The Alumina / Corundum rename clears Molten Glass versus Molten Silica confusion on wall recipes.

Field Debugging

No Firestarter? Return to surface Flint/Pyrite loops in Early Game Materials.

Ore will not break? Hardness gate — check Tools.

Melt sits inert? More Charcoal, better airflow, longer heat, cleaner ore.

Acid does nothing? Wrong rock, evaporated water, or you brought Fluorite without Sulfuric Acid ready.

No nobles? You are mining; you should be building cooling arrays (Builds).

Lost in caves? Map plus flashlight F and a timbered retreat shaft.

Production Order Suggestion

1. Wood → Charcoal → Cuprite Copper.
2. Cassiterite Tin → Bronze.
3. Hematite Iron → Carbon Steel.
4. Sulfur + Water → Sulfuric Acid; + Fluorite → HF.
5. Bauxite Aluminum line; Chromite Chromium line.
6. Columbite Ta/Nb; Lepidolite Lithium; city Borax; Hydrobromic Acid; Manganese reclaim.
7. Cooling Element nobles; Silicon heats; Sylvanite precious metals as needed for ship goals (Walkthrough).

UI Speed Tips

Bind material slots you use every forge night: Charcoal, Copper, Iron, Carbon source, Sulfuric Acid, HF. Keyboard players rebind in settings; controller players use bumpers for tools and D-pad for materials — see Controls and Hotkeys. Enter interacts with machines; do not stand in the melt while mashing inputs.

Related Pages

• Materials Hub — directory.
• Materials Overview — mental model.
• Rare Elements — deep explanations.
• Guides — how-to steel, forge, electrolysis.
• Tools — interactive finders when available.
• Walkthrough — when each reaction becomes mandatory.

Print this page mentally before dangerous batches. Atomcraft rewards chemists who can recite Sulfuric → HF → Columbite while still remembering where they left the Charcoal.