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DUCTILE IRON PROPERTIES |
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| Type | 65-45-12 | 80-55-06 | 100-70-02 |
| Tensile strength (psi) | 65,000 | 80,000 | 100,000 |
| Yield strength (psi) | 45,000 | 55,000 | 70,000 |
| Elongation % | 12 | 6 | 2 |
| Hardness (BHN) | 131-207 | 207-269 | 241-302 |
| Heat-treat response | n/a | Rc 55 min. | Rc 55 min. |
| Microstructure | Ferritic (min. 75% ferrite) | Partially pearlitic (50% pearlite) | Pearlitic (min. 75% pearlite) |
