Place of Origin:
China
Brand Name:
YUHONG
Certification:
ISO 9001/TUV/PED
Model Number:
ASTM A335 P11 Seamless Tube
ASTM A335 P11 Seamless Pipe For Boiler Heat Exchanger For High Temperature Steam Pipe
ASTM A335 P11 steel pipes are a well-known standard and material for boiler tubes. Certain components in boilers operate under high temperature and pressure, such as superheaters, reheaters, main steam piping, and headers.
The properties of P11 material perfectly meet the requirements of these critical components.
It maintains sufficient strength even under the high temperatures of boiler operation.
ASTM A335 P11 steel pipes are widely used in boilers and pressure vessels. They are also commonly used as the base tube for fin tubes.
| Chemical Composition (%) | ||
| Element | Standard Requirement (≤) | Typical Value / Note |
| Carbon (C) | 0.15 max | 0.09–0.13 |
| Manganese (Mn) | 0.30–0.60 | 0.40–0.60 |
| Phosphorus (P) | 0.025 max | 0.020 max |
| Sulfur (S) | 0.025 max | 0.015 max |
| Silicon (Si) | 0.25–1.00 | 0.50–0.80 |
| Chromium (Cr) | 8.00–10.00 | 8.50–9.50 |
| Molybdenum (Mo) | 0.90–1.10 | 0.95–1.05 |
| Iron (Fe) | Balance | Balance |
| Others | — | Residuals |
| Mechanical Properties | ||
| Property | Standard Requirement | Note / Condition |
| Tensile Strength, min | 415 MPa (60 ksi) | |
| Yield Strength, min | 205 MPa (30 ksi) | 0.2% offset |
| Elongation in 2 in (50 mm), min | 30% | For wall thickness ≥ 0.007 in (0.18 mm) |
| Hardness, max | 179 HBW | Brinell Hardness (typical) |
| Heat Treatment | Full Anneal | Or normalized and tempered |
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