What is ASTM A335 P1 low-alloy steel pipe?

ASTM A335 P1 (ASME SA335 P1) is a seamless ferritic low-alloy steel pipe for high-temperature service. P1 contains 0.44 – 0.65% molybdenum alloying elements and has a tensile strength of 380 MPa and a yield strength of 205 MPa.
P1 is more suitable for lower temperature and pressure applications than other high-grade tubes.

Scope of ASTM A335 GR.P1

This specification covers nominal wall and minimum wall seamless ferritic alloy-steel pipe intended for high-temperature service. Pipe ordered to this specification shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Selection will depend upon design, service conditions, mechanical properties, and high-temperature characteristics.

ASTM A335 P1 Equivalent

Applications of ASTM A335 P1 Alloy Steel Seamless Pipes

The reliable performance of ASTM A335 P1 Pipes at moderate elevated temperatures makes them suitable for various applications. Our Alloy Steel P1 Pipes are commonly used in:

• Power Generation: Low-to-moderate temperature steam lines, auxiliary piping, boiler feed water lines, and as Boiler tube P1 in lower temperature sections of industrial and utility boilers.
• Petrochemical Plants: Process piping for fluids and gases at moderate temperatures where the higher alloy content of P5, P9, P11, or P22 is not required.
• Refineries: Utility lines, low-temperature process lines.
• General Industrial Heating: Piping for industrial heating systems and process equipment operating at moderate temperatures.
• Heat Exchangers: Used as Heat exchanger pipe P1 in applications with less aggressive media and moderate temperatures.

While ASTM S335 Grade P1 is a foundational alloy steel, it provides a dependable and economical solution for many moderate P1 high-temperature pipe service requirements.