300M Ultrahigh Strength Steel
Subcategory: Carbon Steel; Ferrous Metal; Low Alloy Steel; Medium Carbon Steel; Metal
| Component | Wt. % |  | | | C | 0.4 - 0.46 | | | Cr | 0.7 - 0.95 | | | Fe | 93.4 - 94.8 | | | Mn | 0.65 - 0.9 | |
| | Component | Wt. % | | | | Mo | 0.3 - 0.45 | | | Ni | 1.65 - 2 | | | P | Max 0.035 | |
| | Component | Wt. % | | | | S | Max 0.04 | | | Si | 1.45 - 1.8 | | | V | Min 0.05 | |
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Material Notes:
Iron content calculated as balance. Phosphorous and sulfur content may vary. Silicon content helps to prevent embrittlement when tempered at low temperatures. Easily processed by hot forging; slow cooling is needed to prevent stress cracking.
| Physical Properties | Metric | English | Comments |
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| Density | 7.87 g/cc | 0.284 lb/in³ | Typical of steel |
Mechanical Properties |
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| Modulus of Elasticity | 205 GPa | 29700 ksi | Typical of steel |
| Poisson's Ratio | 0.28 | 0.28 | Calculated |
| Shear Modulus | 80 GPa | 11600 ksi | Typical of steel |
References for this datasheet.
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