Steel

The Steel chain is the second chain of resources you can get in the game. It is achieved by researching Steel Components for 200 Research Points. The only prerequisite of it is buying Research itself. These are the items in the steel chain:

Coal Buyer
The Coal Buyer is the first component in the steel chain. It buys 2 Coal for 10$ every 10 ticks. It has a base cost of 1000$, but it uses up 1$ every tick it is on the board.

Upgrades:

Item Multiplication: Buys more coal per 10 ticks but also doubles the running cost. Cost: 40K for first.

Running Cost Reduction: Reduces the Running Cost for coal by 5% compounding. Cost: 20K for first.

Iron Ore Buyer
Also part of the Iron Chain, the Iron Ore Buyer buys 1 iron ore every 10 ticks. It has a base cost of 50$.

Upgrades:

Item Multiplication. Same as coal, but doesn't double running cost. Cost: 800$ for first.

Iron Foundry
The Iron Foundry uses up 2 Iron Ore every 10 ticks to produce 1 Iron. It has a base cost of 50$.

Upgrades:

Item Multiplication. Same as Iron Buyer, but uses twice the ore. Cost: 800 for first.

Steel Foundry
The Steel Foundry uses 4 Iron and 4 Coal to produce 1 Steel every 10 ticks. It has a base cost of 4000$ and a running cost of 4$/tick.

Upgrades:

Item Multiplication. Same as Coal Buyer, but uses twice the Iron and twice the Coal. Cost: 150,000$ for first.

Running Cost Reduction. Same as Coal. Cost: 20,000$ for first.

Steel Seller
The Steel Seller is the final component in the Steel Chain. It sells 2 steel for 272$ every 10 ticks. It has a base cost of 1,500$ and a running cost of 1$/tick.

Upgrades:

Item Multiplication. Same as Coal, except for selling steel. Cost: 50,000$ for first.

Running Cost Reduction. Same as others. Cost: 100,000$ for first.

Resource Sale Price. Sell steel for 10% more. Cost: 90,000$ for first.

Other Chains Used In
Coal is used in several other chains, such as the Plastic Chain.

The Iron Foundry and Iron Buyer are also used in the Iron Chain as well as the Research Chain.

Steel is also used in the Research Chain.