Alloy steel castings
ASTM A217 WC9 — chemistry & properties
ASTM A217 WC9 (Alloy steel castings, UNS J21890): chemical composition and mechanical properties. High-temperature steam valve bodies (2¼Cr-1Mo)
Chemical composition (wt %)
| C | 0.05 – 0.18 |
| Mn | 0.4 – 0.7 |
| P | ≤ 0.04 |
| S | ≤ 0.045 |
| Si | ≤ 0.6 |
| Cr | 2 – 2.75 |
| Mo | 0.9 – 1.2 |
Mechanical properties
| Tensile strength, min | 485 MPa |
| Yield strength, min | 275 MPa |
| Elongation, min | 20 % |
| Hardness | Not specified |