ASME/ASTM Standard
High Temperature Alloy Steel Seamless Ferrite Nominal Pipe
Standard
ASME SA335/SA335M
Main Steel Tube Grades
A335P1, A335P2, A335P5, A335P5b, A335P5c, A335P9, A335P11, A335P12, A335P22, A335P91 etc.
Other grades can also be provided after consulting with customers.
Chemical Composition
| Grade | Chemical Composition % | |||||||
| C | Mn | P≤ | S≤ | Si | Cr | Mo | Others | |
| P1 | 0.10-0.20 | 0.30-0.80 | 0.025 | 0.025 | 0.10-0.50 | / | 0.44-0.65 | / |
| P2 | 0.10-0.20 | 0.30-0.61 | 0.025 | 0.025 | 0.10-0.30 | 0.50-0.81 | 0.44-0.65 | / |
| P5 | ≤0.15 | 0.30-0.60 | 0.025 | 0.025 | ≤0.50 | 4.00-6.00 | 0.45-0.65 | / |
| P5b | ≤0.15 | 0.30-0.60 | 0.025 | 0.025 | 1.00-2.00 | 4.00-6.00 | 0.45-0.65 | / |
| P5c | ≤0.12 | 0.30-0.60 | 0.025 | 0.025 | ≤0.50 | 4.00-6.00 | 0.45-0.65 | / |
| P9 | ≤0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50-1.00 | 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 | / |
| P12 | 0.05-0.15 | 0.30-0.61 | 0.025 | 0.025 | ≤0.50 | 0.80-1.25 | 0.44-0.65 | / |
| P21 | 0.05-0.15 | 0.30-0.60 | 0.25 | 0.025 | ≤0.50 | 2.65-3.35 | 0.80-1.06 | / |
| P22 | 0.05-0.15 | 0.30-0.60 | 0.25 | 0.025 | ≤0.50 | 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 0.030-0.070; Ni ≤0.40; Al ≤0.04; Nb 0.06-0.10
Mechanical Properties
| Grade | Mechanical Properties | ||
| Tensile Strength MPa | Yield Strength MPa | Elongation % | |
| P1 | 380 | 205 | 30 |
| P2 | 380 | 205 | 30 |
| P5 | 415 | 205 | 30 |
| P5b | 415 | 205 | 30 |
| P5c | 415 | 205 | 30 |
| P9 | 415 | 205 | 30 |
| P11 | 415 | 205 | 30 |
| P12 | 415 | 220 | 30 |
| P21 | 415 | 205 | 30 |
| P22 | 415 | 205 | 30 |
| P91 | 585 | 415 | 20 |
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