化学成分：
| 成分 | C | Si | Mn | P | S | Ni | Cr | Mo | Nb | Ti | B |
| WQ690D | ≤0.18 | ≤0.60 | ≤2.0 | ≤0.030 | ≤0.025 | ≤0.80 | ≤1.00 | ≤0.30 | ≤0.11 | ≤0.020 | ≤0.004 |
