Cast Iron

1. Ferrous Metal
2. Alloy

1. Fe

   Iron

2. C

   Carbon

1. ✅ Strong
2. ✅ Cheap

1. 👎 Brittle

Carbon Steel

1. Ferrous Metal
2. Alloy

1. Fe

   Iron

2. C

   Carbon

1. ✅ Strong
2. ✅ Cheap
3. ✅ Weldable
4. ✅ Excellent strength-to-weight

1. 👎 Rust-prone

Stainless Steel

1. Ferrous Metal
2. Alloy

1. Fe

   Iron

2. Cr

   Chromium

1. ✅ Strong
2. ✅ Cheap
3. ✅ Corrosion-resistant

1. 👎 Heavy

Bronze

1. Nonferrous Metal
2. Alloy

1. Cu

   Copper

2. Sn

   Tin

1. ✅ Strong
2. ✅ Corrosion-resistant

Brass

1. Nonferrous Metal
2. Alloy

1. Cu

   Copper

2. Zn

   Zinc

1. ✅ Corrosion-resistant

Aluminum

1. Nonferrous Metal

1. Al

   Aluminum

1. ✅ Fairly Strong
2. ✅ Very Flexible
3. ✅ Lightweight
4. ✅ Corrosion-resistant

1. 👎 Expensive

Copper

1. Nonferrous Metal

1. Cu

   Copper

1. ✅ Cheap
2. ✅ Conductive

Titanium

1. Nonferrous Metal

1. Ti

   Titanium

1. ✅ Very Strong
2. ✅ Heat-resistant
3. ✅ Corrosion-resistant
4. ✅ Bio-compatible

1. 👎 Very Expensive

Silicon

1. Metalloid

1. Si

   Silicon

1. ✅ Essential for semiconductors, solar cells, and ceramics
2. ✅ Cheap

Boron

1. Metalloid

1. B

   Boron

1. ✅ Used as a dopant for semiconductors

Arsenic

1. Metalloid

1. As

   Arsenic

1. ✅ Used as a dopant for semiconductors

Wood

1. Natural Polymer

1. C

   Carbon

1. ✅ Cheap
2. ✅ Abundant

Cellulose

1. Natural Polymer

1. C

   Carbon

1. ✅ Cheap
2. ✅ Abundant

Natural Rubber

1. Natural Polymer

1. C

   Carbon

1. ✅ Durable
2. ✅ Flexible

Polyethylene

1. Synthetic Polymer

1. C

   Carbon

1. ✅ Cheap
2. ✅ Chemical-resistant
3. ✅ Tough
4. ✅ Flexible

Polyvinyl Chloride

1. Synthetic Polymer

1. C

   Carbon

1. ✅ Cheap
2. ✅ Durable
3. ✅ Chemical-resistant
4. ✅ Flexible
5. ✅ Strong

Polystyrene

1. Synthetic Polymer

1. C

   Carbon

1. ✅ Cheap
2. ✅ Flexible
3. ✅ Lightweight

Polyethylene Terephthalate

1. Synthetic Polymer

1. C

   Carbon

1. ✅ Cheap
2. ✅ Strong
3. ✅ Lightweight

Brick

1. Ceramic

1. O

   Oxygen

2. Si

   Silicon

1. ✅ Durable
2. ✅ Heat-resistant

Porcelain

1. Ceramic

1. O

   Oxygen

2. Si

   Silicon

1. ✅ Heat-resistant

1. 👎 Brittle

Glass

1. Ceramic

1. O

   Oxygen

2. Si

   Silicon

1. ✅ Transparent

1. 👎 Brittle

Carbon Fiber

1. Composite

1. C

   Carbon

1. ✅ Strong
2. ✅ Lightweight

1. 👎 Very Expensive