At Namo Alloy, we are premier exporters of high-performance Alloy Steel Pipes, engineered specifically for environments where carbon steel falls short. Our inventory includes a full range of chrome-moly grades, including ASTM A335 P5, P9, P11, P22, and P91. These pipes are designed to retain exceptional mechanical properties at elevated temperatures, offering superior creep resistance and toughness. Ideal for power generation, steam headers, chemical reactors, and boiler piping, our alloy steel pipes provide the critical reliability needed for 24/7 industrial operations. Every pipe in our inventory is 100% mill-certified, ensuring precise chemical balancing and rigorous compliance with international pressure vessel standards.
| Grade | C | Mn | P (Max) | S (Max) | Si | Cr (Chromium) | Mo (Moly) | Others |
|---|---|---|---|---|---|---|---|---|
| ASTM A335 P11 | 0.05 - 0.15 | 0.30 - 0.60 | 0.025 | 0.025 | 0.50 - 1.00 | 1.00 - 1.50 | 0.44 - 0.65 | - |
| ASTM A335 P22 | 0.05 - 0.15 | 0.30 - 0.60 | 0.025 | 0.025 | 0.50 max | 1.90 - 2.60 | 0.87 - 1.13 | - |
| ASTM A335 P91 | 0.08 - 0.12 | 0.30 - 0.60 | 0.020 | 0.010 | 0.20 - 0.50 | 8.00 - 9.50 | 0.85 - 1.05 | V, Nb, N |
| Grade | Tensile Strength (MPa) min. | Yield Strength (MPa) min. | Elongation (% in 50mm) min. | Heat Treatment | Hardness (HB) max. |
|---|---|---|---|---|---|
| ASTM A335 P11 | 415 | 205 | 30 | Normalized & Tempered | 163 HB |
| ASTM A335 P22 | 415 | 205 | 30 | Normalized & Tempered | 163 HB |
| ASTM A335 P91 | 585 | 415 | 20 | Normalized & Tempered | 250 HB |
|
Specifications / Standards
|
ASTM A335 / SA335 (High-Temp Seamless) ASTM A213 / SA213 (Boiler & Heat-Exchanger) ASTM A691 (EFW Alloy Steel Pipes) ASTM A333 Grade 3/6 (Low Temp) Grades: P5, P9, P11, P22, P91, T11, T22 |
|
Manufacturing Condition
|
Hot Rolled Seamless Cold Drawn Seamless Electric Fusion Welded (EFW) Normalized & Tempered Isothermal Annealed |
|
Outer Diameter (OD) Range
|
Seamless: 1/8" NB to 24" NB Welded/EFW: 16" NB to 100" NB Tubes: 6.35 mm OD to 101.60 mm OD (Custom heavy-wall thickness for power plant headers available) |
|
Wall Thickness / Schedule
|
SCH 40 / STD
SCH 80 / XS
SCH 160
SCH XXS
Thickness Range: 2.0 mm to 150.0 mm (Custom Heavy Wall) |
|
Standard Lengths
|
Single Random (5m - 7m) Double Random (11m - 13m) Fixed Lengths up to 18 Meters |
|
Surface Finishes
|
Bare / Black Varnished Shot Blasted Oiled (Rust Prevention) Galvanized Finish |
|
Pipe End Connections
|
Plain End (PE) Beveled End (BE) Threaded Ends (Project Specific) |
|
Testing & Certificates
|
EN 10204 3.1 MTC IGC Test (ASTM A262) High-Temp Tensile Testing Ultrasonic (UT) & Eddy Current Impact Testing at Low Temp |
|
Export Packaging
|
Metal Protectors on Ends Hexagonal Bundles Strong Wooden Crates Anti-corrosion VCI Bags |
Namo Alloy is a leading stockist and global exporter of premium Stainless Steel, Carbon Steel, and High Nickel Alloys.
© Copyright by Namo Alloy | Designed by Mesotek
