Technical Specification of Carbon Grade P9 Pipes
| Parameter | Specification |
|---|---|
| Composition | Chromium 8–10%, Molybdenum 0.9–1.1% |
| Temperature Range | Up to 650°C |
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 205 MPa |
| Hardness | ≤ 90 HRB |
| Standards | ASTM A335 / ASME SA335 |
Chemical Composition of ASTM A335 Grade P9
| Element | Composition (%) |
| Carbon (C) | 0.15 Max |
| Chromium (Cr) | 8.00 – 10.00 |
| Molybdenum (Mo) | 0.90 – 1.10 |
| Manganese (Mn) | 0.30 – 0.60 |
| Silicon (Si) | 0.25 – 1.00 |
| Phosphorus (P) | 0.025 Max |
| Sulfur (S) | 0.025 Max |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
| Tensile Strength | 415 MPa Min |
| Yield Strength | 205 MPa Min |
| Elongation | 30% Min |
| Hardness | 163 HB Max |
| Density | 7.85 g/cm³ |
| Melting Point | Approx. 1450°C |
Equivalent Grades
| Standard | Grade |
| ASTM | A335 P9 |
| ASME | SA335 P9 |
| ASTM | A213 T9 |
| ASME | SA213 T9 |
| DIN | X12CrMo9-1 (Comparable) |
What are ASTM A335 Grade P9 Carbon Steel Pipes?
ASTM A335 Grade P9 Carbon Steel Pipes are seamless ferritic chromium-molybdenum alloy steel pipes specifically developed for high-temperature and pressure-retaining applications. These pipes contain approximately 8.00–10.00% chromium and 0.90–1.10% molybdenum, providing excellent resistance to oxidation, scaling, creep deformation and high-temperature degradation.
ASTM A335 P9 Pipes are widely used in industries where piping systems operate under demanding temperatures and pressures. Their combination of high-temperature strength, thermal stability, oxidation resistance and long-term durability makes them suitable for critical industrial applications.
Mcneil Instruments supplies ASTM A335 P9 Pipes in Turkey, USA and Nigeria, along with India and other international markets. These pipes are commonly used in:
- Thermal power plants
- High-pressure steam systems
- Oil & gas refineries
- Petrochemical facilities
- Boilers and superheaters
- Heat exchangers
- Pressure piping systems
- High-temperature process plants
ASTM A335 P9 Pipes in Turkey
Mcneil Instruments supplies ASTM A335 P9 Carbon Steel Pipes in Turkey for power generation, refinery, petrochemical, EPC and industrial projects. Pipes can be supplied according to applicable ASTM/ASME specifications with required quality documentation and export support.
ASTM A335 P9 Pipes in USA
We supply ASTM A335 P9 Pipes in the USA for high-temperature steam, power generation, refinery, petrochemical and industrial applications. Project-specific sizes, schedules, wall thicknesses and documentation can be accommodated based on requirements.
ASTM A335 P9 Pipes in Nigeria
Mcneil Instruments supplies ASTM A335 P9 Alloy Steel Pipes in Nigeria for oil & gas, power generation, refinery, petrochemical and process industry applications. We provide specification-based supply along with inspection documentation and international export logistics support.
Types of ASTM A335 P9 Carbon Steel Pipes We Supply
Mcneil Instrument manufactures and supplies:
- ASTM A335 P9 Seamless Pipes
- ASTM A335 P9 Welded Pipes
- ASTM A335 P9 ERW Pipes
- ASTM A335 P9 EFW Pipes
- ASTM A335 P9 Round Pipes
- ASTM A335 P9 Boiler Pipes
- ASTM A335 P9 Heat Exchanger Pipes
- ASTM A335 P9 High Pressure Pipes
- ASTM A335 P9 Alloy Steel Pipes
- ASTM A335 P9 Chrome Moly Pipes
Features of ASTM A335 P9 Carbon Steel Pipes
- Excellent high-temperature strength
- Superior oxidation and scaling resistance
- Outstanding creep resistance
- Excellent thermal fatigue resistance
- High pressure handling capability
- Superior corrosion resistance at elevated temperatures
- Excellent weldability and fabrication
- Long operational service life
- High dimensional accuracy
- Low maintenance requirements
Applications of ASTM A335 Grade P9 Carbon Steel Pipes
Our ASTM A335 P9 Carbon Steel Pipes are widely used in:
- Thermal Power Plants
- Oil & Gas Industry
- Petrochemical Plants
- Petroleum Refineries
- Chemical Processing Plants
- Boiler Systems
- Heat Exchangers
- Superheaters
- High Pressure Steam Pipelines
- Pressure Vessels
- Fertilizer Plants
- Industrial Furnace Systems
- Process Piping Systems
- Offshore Platforms
- Power Generation Facilities
Countries We Export To
Mcneil Instrument exports ASTM A335 Grade P9 Carbon Steel Pipes to:
- United States
- Canada
- United Kingdom
- Germany
- France
- Italy
- Netherlands
- UAE
- Saudi Arabia
- Qatar
- Kuwait
- Oman
- Bahrain
- South Africa
- Nigeria
- Australia
- Singapore
- Malaysia
- Indonesia
- Thailand
- Vietnam
- Brazil
Frequently Asked Questions – Carbon Grade P9 Pipes
What are ASTM A335 P9 Carbon Steel Pipes?
ASTM A335 P9 Pipes are seamless ferritic chromium-molybdenum alloy steel pipes designed for high-temperature and pressure-retaining applications. Although commonly referred to as carbon steel pipes, P9 is technically an alloy steel grade containing chromium and molybdenum.
What is the chemical composition of ASTM A335 P9 Pipes?
ASTM A335 P9 typically contains approximately 8.00%–10.00% Chromium and 0.90%–1.10% Molybdenum. These alloying elements provide improved oxidation resistance, high-temperature strength and creep resistance.
Where are ASTM A335 P9 Pipes used?
P9 pipes are widely used in thermal power plants, refineries, petrochemical facilities, boilers, superheaters, reheaters, heat exchangers and high-pressure steam piping systems.
What quality tests are performed on ASTM A335 P9 Pipes?
Depending on project requirements, P9 pipes can undergo hydrostatic testing, ultrasonic testing, chemical analysis, PMI testing, mechanical testing, hardness testing, dimensional inspection and visual inspection. Third-party inspection is also available.
Does Mcneil Instruments supply ASTM A335 P9 Pipes internationally?
Yes. Mcneil Instruments supplies and exports ASTM A335 P9 Alloy Steel Pipes from India to markets including Turkey, USA, Nigeria, Middle East, Europe and Africa, with quality documentation and export logistics support.






