| 标样编号 | IARM 24B Chips |
| 分类 | 化学 |
| 基体 | 铁基 |
| 牌号 | FE Invar-36 |
| Al | 0.002 |
| As | <0.005 |
| B | *0.001 |
| C | 0.053 |
| Co | 0.036 |
| Cr | 0.121 |
| Cu | 0.052 |
| Fe | 62.6 |
| Mn | 0.82 |
| Mo | 0.011 |
| N | 0.0017 |
| Nb | <0.01 |
| Ni | 35.86 |
| P | 0.009 |
| S | 0.001 |
| Si | 0.28 |
| Sn | 0.0018 |
| Ta | <0.005 |
| Ti | 0.002 |
| V | <0.005 |
| W | <0.04 |
| Zr | <0.005 |
| O | 0.003 |
| Se | 0.19 |