ASTM A335 P2 P5 P9 Seamless Alloy Pipes
What is the difference between P5 and P9 alloy steel pipes?
P5 contains 0.5-9% chromium and 0.5-9% molybdenum, P9 contains 9% chromium and 1-1.5% molybdenum, P11 contains 11% chromium and 1.25-1.5% molybdenum, and P12 contains 12% chromium and 1.25-1.5% molybdenum.
What is the hardness of A335 P9 seamless steel pipe?
The hardness of a335 p9 steel pipe shall not exceed 250 HB.
What is the welding process of p9 pipe?
p9 Seamless alloy boiler tube welding processes will include all traditional methods except oxyacetylene welding and submerged arc welding.
What is the thermal conductivity of A335 P9 High pressure alloy steel pipe?
The thermal conductivity of A335 P9 pipes changes according to temperature conditions. Calculated in (W/m-K), carbon steel is 24.3-65.2 and alloy steel is 26-48.6.
Heat Treatment Requirements
| Grade | UNS Number | Heat Treat Type | Austenitizing/ Solutioning Temperature, min or range °F [°C] | Subcritical Annealing or Tempering Temperature, Min or range °F [°C] |
| P5 | K41545 | full or isothermal anneal normalize and temper | … | 1250 [675] |
| P9 | S50400 | full or isothermal anneal normalize and temper | … | 1250 [675] |
Tensile Requirements and Hardness:
| Mechanical Properties | ||||
| Grade | Tensile | Yield | Elongation | Hardness |
| Strength (Mpa) | Strength (Mpa) | (%) | ||
| P5 | ≥415 | ≥205 | ≥30 | ≤89HRB |
| P9 | ≥585 | ≥415 | ≥20 | ≤25HRC |
Alloy Steel A335 P9 Pipes
Size: 50.8 to 860 mm
Wall Thickness: 2.77 to 100mm
Shape: Round
Length: Single random length/ Double random length or as customer's actual request
Grade: P1, P2, P5, P9
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