ASTM A335 P11 Alloy Steel Pipe (ASME S/A335, Chrome-Moly)

ASTM A335 P11 is a seamless ferritic alloy-steel pipe designed for high-temperature service. Its chemical composition (by weight percentage) is as follows:

• Carbon: 0.05–0.60

• Manganese: 0.30–0.60

• Phosphorus (max): 0.025

• Sulfur (max): 0.025

• Silicon: 0.50–1.00

• Chromium: 1.00–1.50

• Molybdenum: 0.44–0.65

ASTM A335 P11 forms part of the alloy steel seamless pipe family and is suitable for bending, flanging, fusion welding, and other forming operations.

Mechanical Properties:

• Tensile Strength (min): 415 MPa

• Yield Strength (min): 205 MPa

The presence of Molybdenum enhances the material’s creep resistance, making it ideal for high-temperature applications.

Applications:

ASTM A335 P11 pipes are widely used in:

• Oil and Gas Industry

• Shipbuilding

• Construction

• Power Plants

• High-Pressure Boilers

• High-Temperature Superheaters

Applications:

• Power Generation (Turbines, Boilers).
• Oil Refineries & Petrochemical Plants.
• Heat Exchangers and Pressure Vessels.
• Industrial Piping Systems.

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