Pressure-vessel plate
ASTM A387 Grade 11 Cl.2 — chemistry & properties
ASTM A387 Grade 11 Cl.2 (Pressure-vessel plate, UNS K11789): chemical composition and mechanical properties. Cr-Mo plate for pressure vessels and fabricated headers
Chemical composition (wt %)
| C | 0.05 – 0.17 |
| Mn | 0.4 – 0.65 |
| P | ≤ 0.025 |
| S | ≤ 0.025 |
| Si | 0.5 – 0.8 |
| Cr | 1 – 1.5 |
| Mo | 0.45 – 0.65 |
Mechanical properties
| Tensile strength, min | 515 MPa |
| Yield strength, min | 310 MPa |
| Elongation, min | 22 % |
| Hardness | Not specified |