Alloy seamless pipe
ASTM A335 P11 — chemistry & properties
ASTM A335 P11 (Alloy seamless pipe, UNS K11597): chemical composition and mechanical properties. 1¼Cr-½Mo for steam and high-temperature service.
Chemical composition (wt %)
| C | 0.05 – 0.15 |
| Mn | 0.3 – 0.6 |
| P | ≤ 0.025 |
| S | ≤ 0.025 |
| Si | 0.5 – 1 |
| Cr | 1 – 1.5 |
| Mo | 0.44 – 0.65 |
Mechanical properties
| Tensile strength, min | 415 MPa |
| Yield strength, min | 205 MPa |
| Elongation, min | 30 % |