Strength comparison among different materials
| Material | Density (g/cm³) |
Tensile strength (gpa) |
Specific strength | Elastic modulus (gpa) |
Specific modulus |
| Steel rebar rebar | 7.85 | 0.5 | 0.0637 | 210 | 26.8 |
| A-glass | 2.46 | 2.1 | 0.854 | 69 | 28 |
| C-glass | 2.46 | 2.5 | 1.02 | 69 | 28 |
| E-glass | 2.60 | 2.5 | 0.962 | 76 | 29.2 |
| S-2 glass | 2.49 | 4.83 | 1.94 | 97 | 39 |
| Silicon | 2.16 | 0.206-0.412 | 0.0954-0.191 | ||
| Quartz | 2.2 | 0.3438 | 0.156 | ||
| Carbon fiber (large) | 1.74 | 3.62 | 2.08 | 228 | 131 |
| Carbon fiber (medium) | 1.80 | 5.10 | 2.83 | 241 | 134 |
| Carbon fiber (small) | 1.80 | 6.21 | 3.45 | 297 | 165 |
| Kevlar K-29 | 1.44 | 3.62 | 2.51 | 41.4 | 28.7 |
| Kevlar K-149 | 1.47 | 3.48 | 2.37 | ||
| Polypropylene | 0.91 | 0.27-0.65 | 0.297-0.714 | 38 | 41.8 |
| Polyacrylonitrile | 1.18 | 0.50-0.91 | 0.424-0.771 | 75 | 63.6 |
| Basalt fiber | 2.65 | 2.9-3.1 | 1.09-1.17 | 85-87 | 32.1-32.8 |