Technical Specification of Molybdenum Grade P11 Pipes
| Parameter | Specification |
|---|---|
| Composition | Chromium 1–1.5%, Molybdenum 0.44–0.65% |
| Temperature Range | Up to 600°C |
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 205 MPa |
| Hardness | ≤ 85 HRB |
| Standards | ASTM A335 / ASME SA335 |
Chemical Composition of ASTM A335 P11 Molybdenum Pipes
| Element | Composition (%) |
| Carbon (C) | 0.05 – 0.15 |
| Chromium (Cr) | 1.00 – 1.50 |
| Molybdenum (Mo) | 0.44 – 0.65 |
| Manganese (Mn) | 0.30 – 0.60 |
| Silicon (Si) | 0.50 – 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. 1420–1450°C |
Equivalent Grades
| Standard | Grade |
| ASTM | A335 P11 |
| ASME | SA335 P11 |
| ASTM | A213 T11 |
| ASME | SA213 T11 |
| DIN | 13CrMo4-5 (Comparable) |
Types of ASTM A335 P11 Molybdenum Pipes We Supply
Mcneil Instrument manufactures and supplies:
- ASTM A335 P11 Seamless Molybdenum Pipes
- ASTM A335 P11 Welded Molybdenum Pipes
- ASTM A335 P11 ERW Pipes
- ASTM A335 P11 EFW Pipes
- ASTM A335 P11 Round Pipes
- ASTM A335 P11 Boiler Pipes
- ASTM A335 P11 Heat Exchanger Pipes
- ASTM A335 P11 High Pressure Pipes
- ASTM A335 P11 Alloy Steel Pipes
- ASTM A335 P11 Chrome Moly Pipes
Features of ASTM A335 P11 Molybdenum Pipes
- Excellent High-Temperature Strength – Maintains mechanical strength and structural integrity during prolonged exposure to elevated temperatures.
- Superior Oxidation Resistance – Chromium content helps protect against oxidation, scaling and surface degradation at high temperatures.
- Outstanding Creep Resistance – Provides reliable long-term performance under continuous high-temperature and high-pressure conditions.
- Excellent Thermal Fatigue Resistance – Performs reliably during repeated heating and cooling cycles.
- High Pressure Handling Capability – Suitable for high-pressure steam lines and critical pressure-retaining applications.
- Good Corrosion Resistance – Provides improved resistance to oxidation and corrosion in demanding industrial environments.
- Good Weldability and Fabrication – Supports industrial fabrication and installation when appropriate welding procedures are followed.
- High Dimensional Accuracy – Manufactured to controlled dimensional requirements for proper fit-up and reliable system integration.
- Long Operational Service Life – Designed to deliver dependable performance in demanding power, refinery and process applications.
- Low Maintenance Requirements – Durable alloy properties support reliable operation and can help reduce maintenance needs.
Applications of ASTM A335 P11 Molybdenum Pipes
Our ASTM A335 P11 Molybdenum Pipes are extensively used in:
- Thermal Power Plants
- Petrochemical Plants
- Oil & Gas Industry
- 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 Energy Projects
- Power Generation Facilities
Countries We Export To
Mcneil Instrument exports ASTM A335 P11 Molybdenum 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
Why Choose Mcneil Instruments?
Mcneil Instruments is a leading ASTM A335 P11 Molybdenum Pipes Manufacturer, Supplier, Stockist & Exporter in India, supplying premium-quality chromium-molybdenum alloy steel pipes for critical high-temperature and high-pressure industrial applications. Our P11 pipes are manufactured using certified raw materials and undergo rigorous quality inspections to ensure superior mechanical performance, dimensional accuracy, corrosion resistance and dependable long-term operation.
We supply ASTM A335 P11 Molybdenum Pipes to customers across India, Turkey, USA, Nigeria and other international markets, supporting power generation, refinery, petrochemical, oil & gas and industrial projects.
Our Advantages
- ISO-certified manufacturing
- Certified chrome moly alloy steel raw materials
- Precision production processes
- Hydrostatic Testing
- Ultrasonic Testing (UT)
- Eddy Current Testing (ECT)
- Positive Material Identification (PMI)
- Mechanical testing
- Chemical analysis
- Dimensional inspection
- Visual inspection
- EN 10204 3.1 Mill Test Certificates
- Complete material traceability
- Third-party inspection available
- Large ready stock
- Custom sizes and schedules
- Competitive pricing
- Worldwide exports
- Dedicated technical support
- Fast delivery
Global Supply & Export Support
Mcneil Instruments supplies ASTM A335 P11 Molybdenum Pipes in India, Turkey, USA and Nigeria, along with other international markets. We support EPC contractors, industrial manufacturers and procurement teams with technical guidance, quality documentation, inspection services and international logistics.
Looking for dependable high-temperature piping solutions? Contact Mcneil Instruments today for the best quotation, technical guidance and reliable global delivery.
Frequently Asked Questions – Molybdenum Grade P11 Pipes
What are ASTM A335 P11 Molybdenum Pipes?
ASTM A335 P11 Molybdenum Pipes are seamless ferritic chromium-molybdenum alloy steel pipes designed for high-temperature and high-pressure service. They provide excellent creep resistance, oxidation resistance and thermal stability.
What are ASTM A335 P11 Pipes used for?
P11 Molybdenum Pipes are widely used in thermal power plants, boilers, superheaters, reheaters, refineries, petrochemical plants, heat exchangers and high-pressure steam piping systems.
What is the chemical composition of ASTM A335 P11?
ASTM A335 P11 typically contains approximately 1.00–1.50% chromium and 0.44–0.65% molybdenum, along with controlled amounts of carbon, manganese, silicon, phosphorus and sulfur according to the applicable specification.
What are the main advantages of P11 Molybdenum Pipes?
The key advantages include excellent high-temperature strength, creep resistance, oxidation resistance, thermal fatigue resistance, good corrosion resistance and long operational service life.
Are ASTM A335 P11 Pipes suitable for high-pressure applications?
Yes. P11 pipes are specifically designed for elevated-temperature and high-pressure service, making them suitable for steam pipelines, boilers, pressure systems and other critical industrial applications.
What testing is available for ASTM A335 P11 Pipes?
P11 pipes can undergo hydrostatic testing, ultrasonic testing, eddy current testing, PMI, mechanical testing, dimensional inspection and visual inspection. Material Test Certificates such as EN 10204 3.1 MTCs can also be supplied.
Does Mcneil Instruments export ASTM A335 P11 Molybdenum Pipes?
Yes. Mcneil Instruments exports ASTM A335 P11 Molybdenum Pipes from India to markets including the USA, Turkey, Nigeria, UAE, Saudi Arabia, Qatar, Kuwait, Oman, UK, Germany and other international destinations, with technical support, certification and export logistics.






