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Product Overview
Introduction To Engineering Steel P11
MOKSH TUBES & FITTINGS LLP is a trusted manufacturer, supplier, exporter, importer, and stockist of P11 steel products including pipes, tubes, plates, and forgings.
EN P11, is a chromium-molybdenum alloy steel commonly used in high-temperature and high-pressure applications such as boilers, superheaters, and pressure vessels. It belongs to the Grade 1 group of alloy steels and is designed to provide excellent strength, creep resistance, and oxidation resistance at elevated temperatures up to 550°C (1022°F).
Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon | 0.07 – 0.15 |
| Chromium | 0.90 – 1.20 |
| Silicon | 0.10 – 0.40 |
| Manganese | 0.30 – 0.60 |
| Molybdenum | 0.44 – 0.65 |
| Sulfur | ≤ 0.035 |
| Phosphorus | ≤ 0.035 |
Technical Composition
Physical Properties
| Property | Imperial | Metric |
|---|---|---|
| Density | 0.284 lb/in³ | 7.85 g/cm³ |
| Melting Point | 2450 – 2550 °F | 1340 – 1400 °C |
| Modulus of Elasticity (Tension) | 29,000 ksi | 200 GPa |
| Modulus of Elasticity (Torsion) | 11,600 ksi | 80 GPa |
| Poisson’s Ratio | 0.29 | — |
| Thermal Conductivity | 45 W/m·K | 45 W/m·K |
| Specific Heat Capacity | 460 J/kg·K | 460 J/kg·K |
Mechanical Properties
| Property | Annealed | Hot-Finished | Cold Drawn | Hot-rolled | Sheet |
|---|---|---|---|---|---|
| Tensile Strength (ksi / MPa) | 75–95 ksi / 517–655 MPa/td> | 80–110 ksi / 552–758 MPa | — | 75–95 ksi / 517–655 MPa | — |
| Yield Strength (0.2%) | 40–60 ksi / 276–414 MPa | 45–90 ksi / 310–620 MPa | — | 40–60 ksi / 276–414 MPa | — |
| Elongation (%) | 20–30 | 15–25 | — | 20–30 | — |
| Brinell Hardness (3000 kg) | 140–190 | 160–220 | — | 140–190 | — |
| Rockwell Hardness (B / C) | 75–85 B | 85–90 B | — | 75–85 B | — |
Products in Engineering Steel P11
Engineering Steel P11 is typically available in:
Engineering Steel P11 products are produced to the following global standards:
Uses and Advantages
Excellent strength and creep resistance at elevated temperatures
Good oxidation and corrosion resistance in steam and gas environments
Suitable for high pressure and thermal cycling applications
Good weldability and machinability
Applications of Engineering Steel P11
Engineering Steel P11 is primarily used for:
Power Generation
Boiler tubes, superheater tubes, and heat exchanger tubes operating at high temperatures and pressures.
Petrochemical Industry
Pressure vessels, reactors, and piping systems handling hot gases and fluids.
Oil & Gas Industry
High-temperature pipelines and components in upstream and downstream processing.
Chemical Processing
Equipment exposed to high temperature and corrosive environments.
WHY CHOOSE US?
FAQ's
What is P11 steel used for?
P11 steel is primarily used in high temperature and high pressure applications, including boiler tubes, superheaters, pressure vessels, and heat exchanger components in power generation, petrochemical, oil & gas, and chemical processing industries.
What are the key properties of P11 steel?
P11 steel provides excellent strength, creep resistance, oxidation resistance, good weldability, and machinability, making it suitable for thermal cycling and high-pressure environments.
In what forms is P11 steel available?
P11 steel is available in seamless and welded pipes, tubes, sheets, plates, bars, flanges, fasteners, and custom fabricated components to meet diverse industrial requirements.
Why is P11 steel suitable for high-temperature applications?
Its chromium molybdenum composition ensures superior creep resistance, oxidation resistance, and strength at elevated temperatures up to 550°C (1022°F), making it ideal for boilers, superheaters, and pressure vessels.
Why choose MOKSH TUBES & FITTINGS LLP for P11 steel?
We provide certified high-quality P11 steel products with comprehensive stock, custom sizing, technical expertise, timely deliveries, competitive pricing, and full traceability for critical alloy steel applications.
Contact Us
For inquiries or quotations for P11 steel products, contact Moksh Tubes & Fittings LLP — your reliable partner for alloy steel solutions.
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