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| Grade Introduction of Rods | |||||||||
| Grade | Co | Grain Size of WC | Hardness | Density | Flexural Strength | Fracture Toughness | Elastic Modulus | Coefficient of Thermal Expansion | |
| % | HRA | HV30 | g/cm³ | MPa | MNm-3/2 | GPa | 10-6/°c | ||
| ST10F | 6 | Sub-Micron | 92.9 | 1840 | 14.8 | 4200 | 10 | 530 | 4.9 |
| ST10UF | 6 | Ultra-fine | 93.8 | 2040 | 14.7 | 3900 | 9 | 530 | 4.9 |
| ST10NF | 6 | Nano | 94.5 | 2180 | 14.6 | 3200 | 9 | 530 | 4.9 |
| ST10C | 7 | Fine | 90.7 | 1480 | 14.7 | 4000 | 12 | 520 | 5 |
| ST11F | 8 | Sub-Micron | 92.3 | 1720 | 14.6 | 4400 | 10 | 510 | 5.1 |
| ST11UF | 8 | Ultra-fine | 93.5 | 1960 | 14.5 | 4200 | 9 | 510 | 5.1 |
| ST12F | 9 | Ultra-fine | 93.5 | 1960 | 14.4 | 5500 | 10 | 500 | 5.3 |
| ST12NF | 9 | Nano | 94.2 | 2100 | 14.3 | 5600 | 9 | 500 | 5.3 |
| ST15D | 9 | Sub-Micron | 91.2 | 1520 | 14.4 | 4100 | 13 | 500 | 5.3 |
| ST15F | 10 | Sub-Micron | 92.0 | 1670 | 14.3 | 4600 | 11 | 490 | 5.4 |
| ST20F | 10 | Sub-Micron | 91.7 | 1620 | 14.4 | 4700 | 11 | 490 | 5.4 |
| ST20D | 10 | Sub-Micron | 92.0 | 1670 | 14.3 | 4300 | 11 | 490 | 5.4 |
| ST25F | 12 | Ultra-fine | 92.4 | 1740 | 14.1 | 5100 | 10 | 470 | 5.7 |
| ST25EF | 12 | Ultra-fine | 92.2 | 1700 | 14.1 | 4800 | 10 | 470 | 5.7 |
| ST25D | 12 | Ultra-fine | 91.5 | 1570 | 14.2 | 4600 | 13 | 470 | 5.7 |
| ST37NF | 15 | Nano | 92 | 1670 | 13.8 | 5700 | 10 | 430 | 6.3 |
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