| Material | Grey  Cast Iron |
Nodular  Iron |
1018 / 1020 | SAE Â 1045 |
SAE Â 4140 |
6061 Â Aluminum |
7075 Â Aluminum |
Titanium |
| Tensile | 30,000 | 60,000 | 55,000 | 90,500 | 148,000 | 45,000 | 83,000 | 144,000 |
| Thermal Expansion |
0 – 6 | 6.6 – 10.4 | 5.9 – 7.5 |  5.9 – 7.5 | 8 – 8.3 | 11.7 – 13.7 | 11.7 – 13.7 |  4.3 – 7.5 |
| Hardness  bhn |
100 – 120 | 150 | 101 | 197 | 302 | 95 | 150 | 320 – 380 |
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