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Home Industry News ASTM A335 Chrome-Moly P5, P9, P11, P22, P91 Seamless Steel Pipe

ASTM A335 Chrome-Moly P5, P9, P11, P22, P91 Seamless Steel Pipe
2025-11-24

What is ASTM A335 Pipe?

ASTM A335 pipe, also known as Chrome-Moly Alloy Pipe, is widely used in various industries for high temperature and high pressure services. It is available in different grades such as P5, P9, P11, P22, and P91. Market data shows that it is one of the most commonly used alloy pipes in industries such as boiler manufacturing, heat exchangers, power stations, and high and super high pressure vessels.

What is ASTM A335 Pipe used for?

ASTM A335 pipe is used for the manufacturing of seamless ferritic alloy-steel pipe designed for high-temperature service. It finds applications in various industries, primarily where high-temperature and high-pressure conditions are encountered. Some common uses of ASTM A335 pipes include:

  1. Power Plants: They are used for the construction of boilers, superheaters, and heat exchangers in thermal power plants.
  2. Refineries: ASTM A335 pipes are employed for high-temperature processes in oil refineries, such as cracking units and distillation columns.
  3. Petrochemical Industry: They are utilized in the production of petrochemicals and chemicals, particularly in high-temperature reactions.
  4. Chemical Processing: These pipes find use in various chemical processes that involve elevated temperatures.
  5. High-Temperature Service: Any application where pipes need to withstand high temperatures, making them suitable for power generation and industrial processes.

Overall, ASTM A335 pipes are essential in industries where the combination of high-temperature resistance and strength is crucial for safe and efficient operations.

What is the specification of A335 pipe?

Length: 6 meters, 12 meters or customized. ASTM A335 P11 Pipe (ASME SA335 P11) is Chrome Moly Alloy Seamless Pipe that used for high-temperature services, P11 Grade Pipe Chrome content at 1.00% to 1.50%, Moly content 0.44% to 0.65%, Minimum tensile strength 415MPa, minimum yield strength 205Mpa.

Tensile Requirements

Tensile Strength, min., psi P5 P9 P11 P22 P91
ksi  60  60  60  60 85
MPa 415 415 415 415 585
Yield Strength, min., psi
ksi 30 30 30 30 60
MPa 205 205 205 205 415

Mechanical properties of ASTM A335

Grade Tensile strength Yield strength
 P1,P2  380  205
 P12  415  220
 P23  510  400
 P91  585  415
 P92,P11  620  440
 P122  620  400

 

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