| Vendor | Spec | Unit | Price | Currency | Date |
| Hunan Qilu New Materials Technology Co., Ltd. | China national standards | MT | 1072.9 | USD | 20251107 |
| Hunan Qilu New Materials Technology Co., Ltd. | China national standards | MT | 1071.19 | USD | 20251017 |
| Hunan Qilu New Materials Technology Co., Ltd. | China national standards | MT | 1154.15 | USD | 20251010 |
| Hunan Qilu New Materials Technology Co., Ltd. | China national standards | MT | 1154.15 | USD | 20251010 |