1. Bronze:

* Copper + Tin (and sometimes other elements like aluminum, manganese, or nickel)

2. Brass:

* Copper + Zinc (and sometimes other elements like lead, aluminum, or manganese)

3. Steel:

* Iron + Carbon (and sometimes other elements like chromium, nickel, manganese, or silicon)

4. Stainless Steel:

* Iron + Chromium + Nickel (and sometimes other elements like molybdenum, titanium, or nitrogen)

5. Aluminum Alloys:

* Aluminum + Copper, Magnesium, Manganese, Silicon (various combinations for different properties)

How do alloys work?

Metals mixed together in specific proportions create alloys. This changes the properties of the resulting material. For example, adding tin to copper makes it harder and stronger, creating bronze.

Let me know if you'd like to learn more about a specific alloy!