ASTM A335 P11 is a grade of seamless ferritic alloy steel pipe specifically intended for high-temperature service. It is one of the grades specified in the ASTM A335 standard, which covers seamless ferritic alloy-steel pipe for various applications, particularly those involving elevated temperatures and pressures.
Here are some key details about ASTM A335 P11 material:
Chemical Composition:
Chromium (Cr): 1.00-1.50%
Molybdenum (Mo): 0.44-0.65%
Carbon (C): 0.05-0.15%
Manganese (Mn): 0.30-0.60%
Phosphorus (P): 0.025% max
Sulfur (S): 0.025% max
Silicon (Si): 0.50-1.00%
Mechanical Properties:
Tensile Strength: 415 MPa (60,000 psi) minimum
Yield Strength: 205 MPa (30,000 psi) minimum
Elongation: 30% minimum
Hardness: Brinell (HB) 163 max
Applications:
ASTM A335 P11 is commonly used in high-temperature applications such as power generation, petrochemical, refineries, and other industries where elevated temperatures and high pressures are encountered.
Manufacturing:
The pipe is manufactured through either the seamless or welded process. For ASTM A335 P11, the seamless manufacturing process is more common.
End Finishes:
ASTM A335 P11 pipes can have various end finishes, including plain end, beveled end, and threaded end.
Coating and Protection:
The pipes may be supplied with various coatings for protection against corrosion. Common coatings include black and hot-dipped galvanized.
Standards:
ASTM A335 P11 is part of the ASTM A335/A335M standard, which covers seamless ferritic alloy-steel pipe for high-temperature service.
ASTM A335 P11 is known for its good strength at elevated temperatures and excellent corrosion resistance. It is often used in applications involving high-temperature steam and hot water, such as in power plants and boiler systems.
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