Hardness matching between wheels and rails of high-speed railway in China
| Rail material | Rail surface hardness/HB | Wheel material | Rim hardness/HB | Wheel–rail hardness ratio |
|---|---|---|---|---|
| U71MnG | 260∼300 | SSW-Q3R | 311∼363 | >1：1 |
| ER8 | ≥245 | <1：1 | ||
| ER8C | ≥245 | <1：1 | ||
| ER9 | ≥255 | ≈1：1 | ||
| D2 | ≥260 | ≈1：1 | ||
| U75VG | 280∼320 | SSW-Q3R | 311∼363 | >1：1 |
| ER8 | ≥245 | <1：1 | ||
| ER8C | ≥245 | <1：1 | ||
| ER9 | ≥255 | <1：1 | ||
| D2 | ≥260 | <1：1 |
| Rail material | Rail surface hardness/HB | Wheel material | Rim hardness/HB | Wheel–rail hardness ratio |
|---|---|---|---|---|
| U71MnG | 260∼300 | SSW-Q3R | 311∼363 | >1：1 |
| ER8 | ≥245 | <1：1 | ||
| ER8C | ≥245 | <1：1 | ||
| ER9 | ≥255 | ≈1：1 | ||
| D2 | ≥260 | ≈1：1 | ||
| U75VG | 280∼320 | SSW-Q3R | 311∼363 | >1：1 |
| ER8 | ≥245 | <1：1 | ||
| ER8C | ≥245 | <1：1 | ||
| ER9 | ≥255 | <1：1 | ||
| D2 | ≥260 | <1：1 |
Source(s): Authors’ own work
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