ASTM A335 Grade P9 Black Painting Alloy Steel Seamless Pipe For Oil And Gas Plant
ASTM A335 / ASME SA335 grade P9 alloy steel pipe is seamless ferritic alloy steel pipes, which is designed for long-term service under high temperature, high pressure and steam corrosion environments. This ASTM A335 P9 alloy steel seamless pipe offers excellent high-temperature creep resistance, thermal stability, oxidation resistance and hydrogen attack resistance. It is the preferred material for main steam lines, reheater tubes, superheater tubing and high-temperature process piping in thermal power plants, refineries and hydrogenation units. In addition to P9 material, YUHONG GROUP can also produce P1, P2, P5, P11, P12, P22, P91, P92 material grades. The outer diameter ranges from 1/2" to 48". And the length can be cut into fixed length according to the client's request.
Chemical Composition(%):
| Element |
Specification |
| Carbon (C) |
0.08 – 0.12 |
| Manganese (Mn) |
0.30 – 0.60 |
| Phosphorus (P) |
≤ 0.020 |
| Sulfur (S) |
≤ 0.010 |
| Silicon (Si) |
0.20 – 0.50 |
| Chromium (Cr) |
8.00 – 10.00 |
| Molybdenum (Mo) |
0.85 – 1.05 |
| Nickel (Ni) |
≤ 0.40 |
| Copper (Cu) |
≤ 0.25 |
| Vanadium (V) |
≤ 0.15 |
| Titanium (Ti) |
≤ 0.010 |
| Columbium (Nb) |
≤ 0.010 |
| Aluminum (Al) |
≤ 0.040 |
Mechanical Properties:
| Tensile Strength, Rm |
585 – 760 MPa |
| Yield Strength, Rp0.2 |
≥ 370 MPa |
| Elongation (longitudinal, 50 mm gauge) |
≥ 20 % |
| Hardness |
≤ 250 HBW |
Main Features:
High creep strength
Good oxidation resistance
Hydrogen resistance
Good weldability
Good high-temperature strength
Moderate thermal conductivity, low thermal expansion
Typical Applications Of ASTM A335 P9 Alloy Steel Pipes:
Boiler superheater and reheater tubes and piping
Steam headers and main steam piping
High-temperature steam and process piping in power plants
Heat-exchanger tubes and shells in high-temperature service
Refinery and petrochemical furnace piping
High-temperature/high-pressure hydrogen service piping
Chemical and process industries
High-temperature manifolds, collectors, and connecting piping
Ordering information:
When ordering ASTM A335 Grade P9 Alloy Steel Seamless Pipe, specify:
Standard: ASTM A335/A335M
Grade: P9
Size: NPS × schedule or OD × WT
Length: random, fixed, or double random
Heat treatment
Surface finish and end finish
Testing: HT, NDT(ET, UT, etc.), etc.
Marking
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