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ASTM A335 P11 Pipe
Material Overview
ASTM A335 P11 Pipe is a seamless ferritic alloy steel pipe commonly used in high-temperature applications. It is suitable for bending, flanging, and similar forming operations, and has excellent tensile, yield, and creep-rupture properties.
Specification
The ASTM A335 P11 specification covers nominal wall and minimum wall seamless ferritic alloy-steel pipe intended for high-temperature service. The pipe shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding.
Chemical Composition
The table below presents the chemical composition of ASTM A335 P11:
| Element | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Silicon (Si) | Chromium (Cr) | Molybdenum (Mo) |
| Percentage | 0.05 - 0.15 | 0.30 - 0.60 | 0.025 | 0.025 | 0.50 - 1.00 | 1.00 - 1.50 | 0.44 - 0.65 |
Mechanical Properties
The mechanical properties of ASTM A335 P11 vary after different heat treatment processes. The table below shows the mechanical properties of the normalized and tempered condition:
| Property | Value |
| Tensile Strength, min | 415 MPa (60,200 psi) |
| Yield Strength, min | 205 MPa (29,700 psi) |
| Elongation, min | 30% |
| Hardness (HB), max | 163 (obtained from hot hardness testing) |
Steel Grade
ASTM A335 P11 is classified as a low alloy steel grade. It contains a significant amount of chromium and molybdenum, which enhances its high-temperature strength and corrosion resistance.
Application
ASTM A335 P11 is widely used in various high-temperature applications in industries such as:
- Power generation plants
- Petrochemical refineries
- Oil and gas industry
- Chemical processing plants
- High-temperature services in general engineering
Its excellent mechanical properties and resistance to high-temperature environments make it a preferred choice for these demanding applications.
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