Seamless pipe
ASTM A335 P23 — chemistry & properties
ASTM A335 P23 (Seamless pipe, UNS UNS K41650): chemical composition and mechanical properties. Waterwall and header piping in supercritical boilers
Chemical composition (wt %)
| C | 0.04 – 0.1 |
| Mn | 0.1 – 0.6 |
| P | ≤ 0.03 |
| S | ≤ 0.01 |
| Si | ≤ 0.5 |
| Cr | 1.9 – 2.6 |
| Ni | ≤ 0.4 |
| Mo | 0.05 – 0.3 |
| N | ≤ 0.015 |
Mechanical properties
| Tensile strength, min | 510 MPa |
| Yield strength, min | 400 MPa |
| Elongation, min | 20 % |
| Hardness | 220 HBW max (97 HRB) |