ASTM A335 P9 Seamless Pipe

ASTM A335 P9 Seamless Pipe and tube
The A335 P9 pipe is made from ferritic Alloy-Steel, which is for high temperature applications. The SA335 P9 material chemically contains materials like Molybdenum and Chromium added to the alloy. By the addition of materials like Molybdenum and chromium, it can increase the tensile strength of the alloy. The yield strength of the A335 P9 seamless pipe is 205 Mpa, the tensile strength is 415 Mpa, and the elongation percentage of the pipe is about 30%.

The chromium content in the A335 P9 pipe makes it highly resistant to corrosion. Therefore, the A335 P9 Pipe has excellent resistance to oxidation at elevated temperature. Besides chromium, ASTM A335 P9 alloy steel pipes that are externally coated with either Black oil paint or anti-corrosion oil show good resistance to corrosion. It could also be galvanized with zinc. The zinc coated increases its resistance to atmospheric corrosion.

A335 P9 Pipe can be manufactured by forming them either through hot finishing or cold drawing. After forming, the pipes have to be finished with heat treatment that includes Full or Isothermal Annealing, Normalizing and Tempering. 

ASTM A335 Gr P9 Composition

 ASTM A335 P9 Properties

Heat Treatment of ASTM A335 P9 alloy steel pipe

• A / N+T
• N+T / Q+T
• N+T

HT pipe ASTM A335 P9 steel pipe do these tests:

• PMI test
• Dimension Test
• Visual Test
• Hydrostatic test
• Flattening Test

Applications:
A335 P9 pipes and tubes are used in the industries that require transportation of gas and fluid at high pressure and temperatures from the off-site or onsite to the plants. E.g: power plants, nuclear plants, petrochemical industries and industrial boilers need pipes to convey oils, water, steam and gas across from the site to the plant.