Ferritic seamless grade ASTM A335 P9 is available. Chromium and molybdenum, together with additional alloying elements, are used in an exceptional combination to create the high-temperature-grade ASTM A335 P9 pipe. Due to its greater tolerance and resistance to reducing and corrosive fluids in stress-induced setups, alloy steel P9 pipe is preferred. The P9 Pipe material's great strength is exhibited by excellent mechanical qualities. The minimum tensile strength for this grade is 60,000 PSI. The minimum yield strength of the A335 P9 material is 30,000 PSI, and it exhibits outstanding workability even after being easily extended by 30%.
Due to their susceptibility to high pressures and temperatures, the piping components in the P9 grade are mostly constructed in seamless forms. Precision hot billets are passed through a metal grade to create piping grades, which is how Seamless Ferritic Alloy Steel P9 Pipe is made. The ASTM A335 Gr. P9 SMLS pipes are produced using an extrusion method that gives them increased strength and exceptional load-bearing capacity. Both hot rolling and cold rolling methods can be used to prepare these pipes. A pressurized vessel grade that is created by treating the metal at extremely high temperatures in mills can employ SA 335 P9 hot-finished seamless pipes.
Mechanical Tests Specified of ASTM A335 P9 alloy steel pipe
Transverse or longitudinal tension tests as well as flattening, hardness, or bend tests can be performed. Tests must be performed on 5% of the pipe from each treated lot for material that has been heat-treated in a batch-type furnace. At least one pipe must be tested for small lots. Tests must be performed on at least 2 pipes but in no case fewer than 5% of the material that has undergone continuous heat treatment.
Notes for Bend Test of ASTM A335 P9 Alloy Steel Pipe
For pipes with a diameter greater than NPS 25 and a diameter-to-wall thickness ratio of 7.0 or less, the bend test should be performed rather than the flattening test. Subject to the buyer's consent, other pipes with diameters equal to or greater than NPS 10 may undergo the bend test instead of the flattening test. At room temperature, the bend test specimens must be bent through 180 degrees without shattering on the exterior of the bent part.
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