As a leading distributor of high-performance piping solutions, Excellent Overseas specializes in ASTM A335 Grade P9 Seamless Alloy Steel pipes manufactured by top-tier global mills such as Tenaris, JFE, Nippon Steel, and MSL.
Table of Content
Supply Range & Dimensions
Outer Diameter (OD)1/2" NB to 36" NB
Schedule (WT)SCH 20 up to XXS (max 250mm WT)
LengthSingle Random, Double Random & Custom Length
Grade SpecificationGrade P9 (UNS S50400)
Alloy Make-up9% Chrome (Cr), 1% Moly (Mo)
Manufacturing FormSeamless Only (Extrusion / Piercing)
Equivalent StandardsEN 10216-2, DIN 17175
TestingHydrostatic, NDT (Eddy Current / UT)
CertificationsEN 10204 3.1 / 3.2, IBR, NACE MR0175
Surface FinishBare, Black Oil, Anti-rust Paint
Value AddedBeveling, Machining, Bending
Export AreasUSA, Saudi Arabia, Kuwait, Europe
Manufacturers in Stock
Tenaris
JFE Steel
Nippon Steel
MSL
ArcelorMittal
Benteler
Tubos Reunidos
Hyundai Steel
Chemical Composition (ASTM A335 Grade P9)
| Element | Symbol | Composition (%) |
|---|---|---|
| Carbon | C | 0.15 max |
| Manganese | Mn | 0.30 - 0.60 |
| Phosphorus | P | 0.025 max |
| Sulfur | S | 0.025 max |
| Silicon | Si | 0.25 - 1.00 |
| Chromium | Cr | 8.00 - 10.00 |
| Molybdenum | Mo | 0.90 - 1.10 |
Mechanical Properties
| Property | Metric Units | Imperial Units |
|---|---|---|
| Tensile Strength (Min) | 415 MPa | 60,000 psi |
| Yield Strength (Min) | 205 MPa | 30,000 psi |
| Elongation (Longitudinal) | 30% (min) | |
Heat Treatment Requirements
| Grade | Heat Treatment Type | Minimum Temperature |
|---|---|---|
| Grade P9 | Full or Isothermal Anneal OR Normalize and Temper |
Tempering at 1250°F [675°C] min |
ASTM A335 P9 Applications
Petrochemical Plants
Refineries & Hydrocrackers
Power Generation Plants
High-Pressure Steam Lines
Furnace Tubes
Transit Timing & Delivery
| Country | Destination Port | Sea Freight Timing | Air Freight Timing |
|---|---|---|---|
 Saudi Arabia | Dammam / Jubail | 10–14 Days | 1–2 Days |
 UAE | Jebel Ali | 4–6 Days | 1 Day |
 United States | Houston | 38–45 Days | 4–5 Days |
 Germany | Hamburg | 30–34 Days | 2–3 Days |
 Singapore | Port of Singapore | 12–16 Days | 1–2 Days |
Process of Manufacturing
A335 P9 pipes are fabricated using a seamless process involving the piercing of a solid steel billet, yielding a continuous, weld-free structure ideal for extreme pressure and temperature.
Coating Material & Protection
Anti-Rust Varnish / Oil
3LPE / 3LPP Coated
FBE Coated
ASTM A335 P9 vs P91
ASTM A335 P9
- • Standard 9Cr-1Mo alloy steel.
- • Excellent resistance to high-temperature corrosion and oxidation.
- • Cost-effective for standard high-temperature refinery and petrochemical uses.
ASTM A335 P91
- • Modified 9Cr-1Mo alloy containing Vanadium, Niobium, and Nitrogen.
- • Vastly superior creep rupture strength and higher temperature tolerance (up to 600°C+).
- • Heavily used in ultra-supercritical modern power generation plants.
Types of ASTM A335 P9 Pipes
Grade P9 Seamless Pipe
P9 Alloy Boiler Tube
P9 High Temp Pipe
Chrome-Moly P9 Alloy
Countries We Export To
- United States
Canada- Saudi Arabia
- UAE
Qatar
Oman
Kuwait
Bahrain
United Kingdom- Germany
Italy
Spain
Brazil
South Africa
Australia- Singapore
Malaysia
Indonesia
Vietnam
Thailand