| Grade | C |
Mn |
P |
S |
Si |
Cr |
Mo |
| P5 | 0.15max |
0.30-0.60 |
0.025 |
0.025 |
0.50 max |
4.00-6.00 |
0.45-0.65 |
| P9 | 0.15 max |
0.30-0.60 |
0.025 |
0.025 |
0.25-1.00 |
8.00-10.00 |
0.90-1.10 |
| P11 | 0.05-0.15 |
0.30-0.60 |
0.025 |
0.025 |
0.50-1.00 |
1.00-1.50 |
0.44-0.65 |
| P22 | 0.05-0.15 |
0.30-0.60 |
0.025 |
0.025 |
0.50 max |
1.90-2.60 |
0.87-1.13 |
| P91 | 0.08-0.12 |
0.30-0.60 |
0.020 |
0.010 |
0.20-0.50 |
8.00-9.50 |
0.85-1.05 |
V 0.18-0.25 |
N 0.03-0.07 |
Ni 0.40 max |
Al 0.02 max |
Cb 0.06-0.10 |
Ti 0.01 max |
Zr 0.01 max |
Mechanical Properties
Grade P11, P22, P5, P9 Grade P91
Tensile strength, min, psi, (MPa) 60,000 (415) 85,000 (585)
Yield strength, min, (MPa) 30.000(205) 60,000 (415)