Seamless pipe
ASTM A335 P9 — chemistry & properties
ASTM A335 P9 (Seamless pipe, UNS K90941): chemical composition and mechanical properties. Furnace tubes and high-temperature refinery piping
Chemical composition (wt %)
| C | ≤ 0.15 |
| Mn | 0.3 – 0.6 |
| P | ≤ 0.025 |
| S | ≤ 0.025 |
| Si | 0.25 – 1 |
| Cr | 8 – 10 |
| Mo | 0.9 – 1.1 |
Mechanical properties
| Tensile strength, min | 415 MPa |
| Yield strength, min | 205 MPa |
| Elongation, min | 30 % |
| Hardness | Not specified |