10CrMo9-10 (1.7380)
EUApproximate matchCEN · EN 10216-2:2013
Family of chrome-molybdenum alloy steel pipes (roughly 1 to 2.25% Cr, 0.45 to 1.1% Mo) intended for high-temperature circuits (superheated steam, refinery reactors and lines, hydrocracking units), typically between 450°C and 600°C depending on Cr-Mo content. US reference: ASTM A335 P11 (1.25Cr-0.5Mo) and P22 (2.25Cr-1Mo), with equivalents in Europe (EN 10216-2), Japan (JIS G3458) and South Korea (KS D3573).
| Grade | Region | Standard | Re (MPa) | Rm (MPa) | Delta |
|---|---|---|---|---|---|
| 10CrMo9-10 (1.7380) | EU | EN 10216-2:2013 | 280 | 450–600 | reference |
| 13CrMo4-5 (1.7335) | EU | EN 10216-2:2013 | 290 | 440–590 | +4% |
| Neighboring grades — different strength | |||||
| STPA23 | JP | JIS G3458:2019 | 205 | ≥410 | -27% |
| STPA24 | JP | JIS G3458:2019 | 205 | ≥410 | -27% |
| SPA23 | KR | KS D3573 | 205 | ≥410 | -27% |
| SPA24 | KR | KS D3573 | 205 | ≥410 | -27% |
| A335 Grade P11 (1.25Cr-0.5Mo) | US | ASTM A335/A335M (ASME SA-335) | 205 | ≥415 | -27% |
| A335 Grade P22 (2.25Cr-1Mo) | US | ASTM A335/A335M (ASME SA-335) | 205 | ≥415 | -27% |
| Grade | C | Mn | Si | P | S | Cr | Mo |
|---|---|---|---|---|---|---|---|
| 10CrMo9-10 (1.7380) | 0.08–0.14 | 0.4–0.8 | ≤0.5 | ≤0.02 | ≤0.01 | 2–2.5 | 0.9–1.1 |
| 13CrMo4-5 (1.7335) | 0.08–0.18 | 0.4–1 | ≤0.35 | ≤0.025 | ≤0.01 | 0.7–1.15 | 0.4–0.6 |
| STPA23 | ≤0.15 | 0.3–0.6 | ≤0.5 | ≤0.03 | ≤0.03 | 1–1.5 | 0.45–0.65 |
| STPA24 | ≤0.15 | 0.3–0.6 | ≤0.5 | ≤0.03 | ≤0.03 | 1.9–2.6 | 0.87–1.13 |
| SPA23 | ≤0.15 | 0.3–0.6 | ≤0.5 | ≤0.03 | ≤0.03 | 1–1.5 | 0.45–0.65 |
| SPA24 | ≤0.15 | 0.3–0.6 | ≤0.5 | ≤0.03 | ≤0.03 | 1.9–2.6 | 0.87–1.13 |
| A335 Grade P11 (1.25Cr-0.5Mo) | 0.05–0.15 | 0.3–0.6 | 0.5–1 | ≤0.025 | ≤0.025 | 1–1.5 | 0.44–0.65 |
| A335 Grade P22 (2.25Cr-1Mo) | 0.05–0.15 | 0.3–0.6 | ≤0.5 | ≤0.025 | ≤0.025 | 1.9–2.6 | 0.87–1.13 |
Note: Equivalent in Cr-Mo composition to P22 (ASTM) and STPA24/SPA24 (JIS/KS), usable up to roughly 530-600°C depending on the source. As with 13CrMo4-5, the minimum yield strength guaranteed by the EN standard is markedly higher than P22's (280 MPa vs. 205 MPa), owing to different standard bases.
Values compiled from public sources for guidance only — always verify against the official standard before use in design or fabrication.