Review Article
Physical Metallurgy of Modern Creep-Resistant Steel for Steam Power Plants: Microstructure and Phase Transformations
Table 5
Nominal chemical compositions (wt%) of ferritic steels.
| Steels | C | Si | Mn | Cr | Mo | W | Co | V | Nb | B | N | Others |
| 2Cr | | | | | | | | | | | | | T22 | 0.12 | 0.3 | 0.45 | 2.25 | 1.0 | — | — | — | — | — | — | — | HCM2S | 0.06 | 0.20 | 0.45 | 2.25 | 0.1 | 1.60 | — | 0.25 | 0.05 | 0.003 | — | — |
| 9Cr | | | | | | | | | | | | | T9 | 0.12 | 0.60 | 0.45 | 9.00 | 1.0 | — | — | — | — | — | — | — | HCM9M | 0.07 | 0.30 | 0.45 | 9.00 | 2.0 | — | — | — | — | — | — | — | T91 | 0.10 | 0.40 | 0.45 | 9.00 | 1.0 | — | — | 0.20 | 0.08 | — | 0.05 | — | NF616 | 0.07 | 0.06 | 0.45 | 9.00 | 0.5 | 1.80 | — | 0.20 | 0.05 | 0.004 | 0.06 | — | Tempaloy F-9 | 0.06 | 0.50 | 0.60 | 9.00 | 1.0 | — | — | 0.25 | 0.40 | 0.005 | — | — | EM12 | 0.10 | 0.40 | 0.10 | 9.00 | 2.0 | — | — | 0.30 | 0.40 | — | — | — |
| 12Cr | | | | | | | | | | | | | HT91 | 0.20 | 0.40 | 0.60 | 12.0 | 1.0 | — | — | 0.25 | — | — | — | 0.5Ni | HT9 | 0.20 | 0.40 | 0.60 | 12.0 | 1.0 | 0.5 | — | 0.25 | — | — | — | 0.5Ni | HCM12 | 0.10 | 0.30 | 0.55 | 12.0 | 1.0 | 1.0 | — | 0.25 | 0.05 | — | 0.03 | — | HCM12A | 0.11 | 0.10 | 0.60 | 12.0 | 0.4 | 2.0 | — | 0.20 | 0.05 | 0.003 | 0.06 | 1.0Cu | NF12 | 0.08 | 0.20 | 0.50 | 11.0 | 0.2 | 2.6 | 2.5 | 0.20 | 0.07 | 0.004 | 0.05 | — | SAVE12 | 0.10 | 0.30 | 0.20 | 11.0 | — | 3.0 | 3.0 | 0.20 | 0.07 | — | 0.04 | 0.07Ta | 0.04Nd |
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