ASTM A335/ASME SA335 Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
Chemical Composition of ASTM A335 P91 Alloy Steel Pipes
| C % | Mn % | P % | S % | Si % | Cr % | Mo % | V % | N % | Ni % | Al % | Nb % |
| 0.08-0.12 | 0.3-0.6 | 0.02 max | 0.01 max | 0.2-0.5 | 8.0-9.5 | 0.85-1.05 | 0.18-0.25 | 0.03-0.07 | 0.4 max | 0.04 max | 0.06-0.10 max |
Mechanical Properties of ASTM A335 P91 Alloy Steel Pipes
| Tensile Strength, Mpa | Yield Strength, MPa | Elongation, % | Hardness, HB |
| 585 min | 415 min | 20 min | 250 max |