ASTM A335 P9 Seamless Ferritic Alloy-Steel Pipe
Description
ASTM A335 P9 Seamless Ferritic Alloy-Steel Pipe
A335 P9 is a high temperature chromium molybdenum alloy heat-resistant steel. Because of its good oxidation resistance, high temperature strength and sulfide corrosion resistance, A335 P9 is widely used in high temperature, high pressure, flammable and explosive pipelines of petroleum refining and chemical equipment, especially the direct heating pipes of heating furnace. The medium temperature can reach 550-600 ℃.
Standard:ASTM A 335/A 335M
Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
ASTM A335 P9 Seamless Ferritic Alloy-Steel Pipes cover nominal (average) wall seamless alloy-steel pipe intended for high-temperature service.
| Grade | Standard | Country |
| STBA26 | JIS G3462 | Japan |
| T9 | ASTM A213 | U.S.A |
| HT7 | SAVDNIK | Sweden |
ASTM A335 P9 Seamless Ferritic Alloy-Steel Pipe Quick Details
Manufacture:Seamless process ,Hot-finished or Cold-finished
Wall thickness(WT): 2.1mm——20 mm.
Outer diameter (OD): 21 mm——509mm
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Treaded
Additional Info
Port of Shipment: Tianjin, China
Payment Terms:T / T, LC
Delivery: 7-15 days after payment
Surface: Tubes will be varnished (Outside only) to prevent rust.
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Bundles (hexagonal),Wooden Boxes,Crates (steel/wooden) or as required
Materials and Manufacture
Grade P9 Pipe may be either hot finished or cold drawn with the finishing treatment.
Heat Treatment:
P9 Seamless Ferritic Alloy-Steel Pipe will be reheated and furnished in the full-annealed, isothermal annealed, or normal-ized and tempered condition. If furnished in the normalized and tempered condition, the minimum tempering temperature are 1250°F [675°C].
Chemical Composition of ASTM A335 P9
| Grade | Chemical Composition(%) | ||||||
| C | Mn | P | S | Si | Cr | Mo | |
| P9 | ≤0.015 | 0.30-0.60 | ≤0.025 | ≤0.025 | ≤0.50 | 4.00-6.00 | 0.45-0.65 |
Mechanical Properties of ASTM A335 P9
| Grade | Mechanical property | ||
| Tensile Strength(MPa) | Yield Strength(MPa) | Elongation(%) | |
| P9 | ≥415 | ≥205 | ≥30 |
Outside diameter tolerances of ASTM A335 Seamless Ferritic Alloy-Steel Pipe
| NPS Designator | Over | Under | ||
| in. | mm | in. | mm | |
| 1⁄8 to 1 1⁄2 , incl. | 1 ⁄ 64 (0.015) | 0.40 | 1 ⁄ 64 (0.015) | 0.40 |
| Over 1 1⁄2 to 4, incl. | 1 ⁄ 32 (0.031) | 0.79 | 1 ⁄ 32 (0.031) | 0.79 |
| Over 4 to 8, incl. | 1 ⁄ 16 (0.062) | 1.59 | 1 ⁄ 32 (0.031) | 0.79 |
| Over 8 to 12, incl. | 3 ⁄ 32 (0.093) | 2.38 | 1 ⁄ 32 (0.031) | 0.79 |
| Over 12 | ± 1 % | |||