Cemented Carbide Roll Rings Grades
1.Table of grades and properties of cemented carbide roll ring and related data
| Grade | Chemical composition | Mechanical properties | Physical properties | |||||
| Co+Ni % | WC % | Hardness HRA | Transverse rupture strength(Sample B)MPa | Compressive Strength MPa | Young's modulus of elasticity KN/mm2 | Density g/cm3 | Thermal conductivity Cal/cm sec/℃ | |
| YGH20 | 10 | 90 | ≥86.0 | ≥2500 | 3500 | 560 | 14.2~14.5 | 0.2 |
| YGH25 | 12 | 88 | ≥84.0 | ≥2300 | 3400 | 550 | 14.0~14.3 | 0.21 |
| YGH30 | 15 | 85 | ≥83.5 | ≥2520 | 3300 | 540 | 13.8~14.2 | 0.2 |
| YGH40 | 18 | 82 | ≥83.0 | ≥2570 | 3200 | 500 | 13.4~13.9 | 0.19 |
| YGH45 | 20 | 80 | ≥82.0 | ≥2570 | 3100 | 480 | 13.3~13.9 | 0.18 |
| YGH55 | 26 | 74 | ≥81.0 | ≥2570 | 3000 | 450 | 12.6~13.2 | 0.17 |
| YGR20 | 10 | 90 | ≥85.0 | ≥2400 | 3400 | 550 | 14.2~14.8 | 0.2 |
| YGR25 | 12.5 | 87.5 | ≥83.0 | ≥2270 | 3300 | 540 | 14.0~14.3 | 0.22 |
| YGR30 | 15 | 85 | ≥83.0 | ≥2360 | 3200 | 530 | 13.8~14.3 | 0.2 |
| YGR40 | 18 | 82 | ≥82.0 | ≥2400 | 3200 | 430 | 13.5~13.9 | 0.2 |
| YGR45 | 20 | 80 | ≥80.5 | ≥2250 | 3000 | 480 | 13.4~13.9 | 0.18 |
| YGR55 | 25 | 75 | ≥79.0 | ≥2400 | 2800 | 420 | 12.9~13.40 | 0.17 |
| YGR60 | 30 | 70 | ≥78.5 | ≥2200 | 2600 | 300 | 12.6~13.1 | 0.16 |
2.Recommended applications of grades for carbide roll rings
| Grade | Recommended applications |
| YGH20 | Maximum hardness, excellent wears resistance in the series. Used in the last 1-2stands of good high speed finishing mills for rolling common and hard steel bars. |
| YGH25 | Higher wear resistance, moderate impact in the series. Used in the last 1-3stands of good high speed finishing mills for rolling common and hard steel bars. |
| YGH30 | Moderate wear resistance and impact resistance, good for general purposes. Used in the last 1-4stands or all stands of finishing mills. |
| YGH40 | Best for general purposes. Used on the front stands of good mills and in the rear stands of common mills. |
| YGH45 | Used in the first and second stands of finishing mills and in the stands of pre-finishing rolling mills; For every stand of rolling lines for low speed rolling, low precision and unstable operation. |
| YGH55 | Maximum binder content in YGH series, good toughness and thermal crack resistance. Used in the stands of pre-finishing rolling mills and for roll rings for hot rolling of ribbed steel. |
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