ASTM A335 P11 Pipes Manufacturer, Supplier & Exporter
Amardeep Steel Centre is a leading Manufacturer, Supplier, and Exporter of high-quality ASTM A335 P11 Pipes. As a widely specified grade of chromium-molybdenum alloy steel, our A335 P11 Alloy Steel Pipe products are engineered for robust and dependable performance in a variety of high-temperature environments. We deliver reliable P11 seamless pipe solutions that meet stringent international standards, offering an excellent balance of strength, temperature resistance, and cost-effectiveness for critical industrial applications.
What Are ASTM A335 P11 Alloy Steel Seamless Pipes?
ASTM A335 P11 Pipes, commonly known as 1.25Cr-0.5Mo or Chrome moly P11 pipe, and identified by UNS K11597 Pipe, are seamless ferritic alloy-steel pipes specifically designed for high-temperature service. The "P11" designation signifies a precise P11 Material Composition within the ASTM A335 standard, featuring approximately 1.00-1.50% chromium and 0.44-0.65% molybdenum. This alloying provides a significant improvement in high-temperature strength, creep resistance, and oxidation resistance compared to carbon steels, making these Alloy Steel P11 Pipes highly versatile.
The seamless manufacturing process, either by hot rolling or cold drawing, ensures that ASTM S335 Grade P11 pipes possess a homogenous structure, providing superior strength and integrity under high-pressure and high-temperature conditions. The ASME SA335 P11 Pipe is the equivalent standard frequently used for applications governed by boiler and pressure vessel codes. Due to its versatile properties and proven track record, P11 material is a cornerstone in industries requiring reliable P11 high-temperature pipe.
The Role of Alloying Elements in P11 Material Composition
The specific performance characteristics of ASTM A335 P11 Pipes are directly attributable to their key alloying elements:
- Chromium (Cr): Typically 1.00% to 1.50%. Chromium is vital for enhancing high-temperature strength and significantly improves resistance to oxidation and scaling in elevated temperature environments. It also contributes to the overall hardness and tensile strength of the P11 material.
- Molybdenum (Mo): Approximately 0.44% to 0.65%. Molybdenum is crucial for increasing creep resistance, which is the material's ability to resist deformation under long-term exposure to high stress at elevated temperatures. It also enhances hardenability, elastic limit, and can reduce susceptibility to temper embrittlement.
This carefully balanced P11 chemical composition ensures that the pipes can withstand demanding service conditions in power plants, refineries, and petrochemical facilities.
Key Properties & Advantages of ASTM A335 Grade P11 Pipes
Choosing ASTM A335 P11 Pipes from Amardeep Steel offers numerous advantages:
- Excellent High-Temperature Strength: The P11 Material Composition ensures good tensile and superior creep strength at elevated service temperatures.
- Good Oxidation and Corrosion Resistance: The chromium content provides effective resistance to scaling and oxidation in high-temperature atmospheres.
- Resistance to Graphitization: Suitable for prolonged service at temperatures where plain carbon steels might degrade due to graphitization.
- Versatility & Wide Application Range: A proven workhorse alloy, ideal for applications like Boiler tube P11, steam lines, and process piping.
- Good Weldability & Fabricability: A335 P11 Alloy Steel Pipe can be readily welded using standard fusion techniques. Appropriate preheat and post-weld heat treatment (PWHT) are generally recommended to optimize weld integrity and material properties. It is also suitable for bending, flanging, and similar forming operations.
- Cost-Effective Performance: Provides a strong balance of high-temperature capabilities and material cost, making it an economical choice for many applications.
- Proven Industry Standard: A long history of reliable performance in demanding industrial environments has established P11 as a trusted material.
ASTM A335 P11 Pipe Specifications
Amardeep Steel supplies ASTM A335 P11 Pipes conforming to rigorous international standards. A comprehensive understanding of the P11 chemical composition and its overall material properties is crucial for proper application.
| Specification Attribute | Details for ASTM A335 P11 Pipes |
|---|---|
| Primary Standard | ASTM A335 / ASME SA335 |
| Grade | P11 |
| UNS Designation | K11597 |
| Manufacturing Process | Seamless (Hot Finished or Cold Drawn) |
| Outer Diameter (OD) | NPS 1/2” to NPS 24” (21.3mm to 610mm). Larger sizes available on request. |
| Wall Thickness (WT) | Schedule 40, SCH STD, SCH 80, SCH XS, SCH 160, and other schedules as per ASME B36.10M. |
| Length | Single Random (SRL), Double Random (DRL), 20 ft (6m), 40 ft (12m), or Custom Cut Lengths. |
| End Connections | Plain End (PE), Bevelled End (BE) as per ASME B16.25 for welding. |
| Heat Treatment | Typically supplied in Full or Isothermal Annealed condition, or Normalized and Tempered. Tempering usually at or above 650°C (1200°F). |
| Testing & Certification | Hydrostatic Testing, NDE (Ultrasonic, Magnetic Particle, etc., as per standards/requirements), Mechanical Tests, Chemical Analysis. Mill Test Certificate (MTC) to EN 10204 3.1. |
| Referred Standards for Manufacturing & Testing: | ASTM A999/A999M (General Requirements), ASTM E213 (Ultrasonic Testing), ASTM E309 (Eddy Current), etc. |
ASTM A335 P11 Material Composition
ASTM A335 P11 is a dense alloy steel with a composition designed for high durability. It has an adjustable strength of 415 MPa minimum and yield strength of 205 MPa minimum, ensuring reliability under extreme conditions. Its expansion percentage is approximately 30% for a steel of this grade. Ductility and high strength make the P11 alloy excellent for severe service in steam pipeline, boiler, and heat exchanger applications. These are the P11 material composition carbon, manganese, phosphorus, sulfur, silicon, chromium, and molybdenum.
| ASTM A335 P11 | Manganese | Molybdenum | Phosphorus | Carbon | Sulfur | Chromium | Silicon |
|---|---|---|---|---|---|---|---|
| 0.30 – 0.60 | 0.44 – 0.65 | 0.025 max | 0.05 – 0.15 | 0.025 max | 1.00 – 1.50 | 0.50 – 1.00 |
Mechanical Properties of ASTM A335 P11 Pipes
| Property | Value |
|---|---|
| Tensile Strength | 60,000 psi (415 MPa) minimum |
| Yield Strength (0.2% offset) | 30,000 psi (205 MPa) minimum |
| Elongation in 2″ (50mm) | 30% minimum (longitudinal) |
| Hardness | 179 HBW (Brinell) / 89 HRB (Rockwell B) max (annealed condition) |
ASTM A335 P11 Pipe Equivalent Materials:
| Standard/Type | Equivalent Grade |
|---|---|
| ASME Pipe Standard | SA335 P11 |
| Tube Equivalent | ASTM A213 T11 |
| Forging/Fitting Equivalent | ASTM A182 F11 / ASTM A234 WP11 |
| Plate Equivalent | ASTM A387 Grade 11 / ASME SA387 Grade 11 |
ASTM A335 P11 Pipe Dimensional Tolerances
| ASTM A530 & ASTM A335 | NPS | Outside Diameter, inch | Tolerance, mm |
| 1/8≤Outer Diameter≤1-1/2 | ±0.40 | ||
| 1-1/2＜Outer Diameter≤4 | ±0.79 | ||
| 4＜Outer Diameter≤8 | +1.59/-0.79 | ||
| 8＜Outer Diameter≤12 | +2.38/-0.79 | ||
| Outer Diameter>12 | ±1% |
ASTM A335 P11 High Pressure Pipe Size Chart
| Outer Diameter * Thickness in MM | Outer Diameter * Thickness in MM | Outer Diameter * Thickness in MM |
|---|---|---|
| 38.1 * 3.2 | 57.0 * 4.9 | 76.2 * 4.0 |
| 38.1 * 4.0 | 57.0 * 6.3 | 76.2 * 5.0 |
| 38.1 * 6.3 | 57.0 * 7.9 | 76.2 * 6.3 |
| 42.4 * 3.2 | 60.3 * 3.2 | 82.5 * 4.5 |
| 42.4 * 4.0 | 60.3 * 3.6 | 88.9 * 3.2 |
| 44.5 * 3.2 | 60.3 * 5.0 | 88.9 * 3.6 |
| 44.5 * 6.3 | 63.5 * 3.2 | 88.9 * 4.0 |
| 48.3 * 3.2 | 63.5 * 3.6 | 101.6 * 3.6 |
| 48.3 * 3.6 | 63.5 * 4.0 | 101.6 * 4.5 |
| 50.8 * 4.5 | 63.5 * 6.3 | 101.6 * 6.3 |
| 51.0 * 3.2 | 63.5 * 7.9 | 114.3 * 3.6 |
| 51.0 * 3.6 | 70.0 * 3.2 | 114.3 * 5.0 |
| 51.0 * 6.3 | 70.0 * 3.6 | 139.7 * 4.0 |
| 57.0 * 3.2 | 70.0 * 6.3 | 139.7 * 5.0 |
| 57.0 * 3.6 | 76.2 * 3.6 | 139.7 * 6.3 |
Heat Treatment of A335 P11 Alloy Steel Pipes:
To ensure optimal mechanical properties for high-temperature service, ASTM A335 P11 Pipes are supplied in a heat-treated condition. The common heat treatments are:
- Full or Isothermal Anneal: This process involves heating the pipe to a suitable austenitizing temperature and then cooling slowly (full anneal) or holding at a specific temperature for transformation (isothermal anneal). This results in a softened material with refined grain structure and improved ductility.
- Normalize and Temper:Normalizing involves heating the pipe above its upper critical temperature and then cooling in still air. This is followed by tempering, which involves reheating to a temperature typically at or above 650°C (1200°F) and holding for a specific time. This N&T process provides an excellent combination of strength, toughness, and creep resistance for Chrome moly P11 pipe.
Applications of ASTM A335 P11 Alloy Steel Seamless Pipes
The versatile properties and proven reliability of ASTM A335 P11 Pipes make them a widely used material in various high-temperature services across multiple industries. Our Alloy Steel P11 Pipes are trusted for these critical applications:
- Power Generation: Steam piping (main steam, hot reheat at moderate conditions), headers, boiler feedwater lines, and as Boiler tube P11 in superheater and reheater sections of industrial and utility boilers.
- Petrochemical Plants: Process piping for hydrocarbons, steam, and other fluids at elevated temperatures; furnace tubes; and components for heat exchangers.
- Oil Refineries: Piping systems for crude oil distillation units, catalytic cracking units, hydrotreaters, and other high-temperature process streams.
- Gas Processing Plants: Equipment and piping handling high-temperature gases.
- General Industrial High-Temperature Service: Any application requiring good strength, oxidation resistance, and creep resistance at temperatures typically up to around 580°C (1075°F).
The reliability and favorable cost-performance ratio of A335 P11 Alloy Steel Pipe make it an industry staple for P11 high-temperature pipe requirements.
Why Choose Amardeep Steel for Your ASTM A335 P11 Pipes?
Amardeep Steel is your trusted Manufacturer, Supplier, and Exporter of ASTM A335 P11 Pipes in India and globally:
- Proven Expertise: Extensive experience and deep understanding of P11 material, its P11 Material Composition, properties, and diverse industrial applications.
- Comprehensive Inventory: We maintain a significant stock of ASTM A335 P11 Alloy Steel Seamless Pipes in a wide range of sizes and schedules to ensure prompt delivery.
- Stringent Quality Assurance: Our ISO 9001 certified processes and rigorous testing ensure every ASTM S335 Grade P11 pipe meets or exceeds international standards, supplied with a full MTC detailing the P11 chemical composition and mechanical properties.
- Competitive Pricing: We offer an excellent Price for high-quality Chrome moly P11 pipe, providing exceptional value for your projects.
- Global Export Capabilities: Efficient logistics and extensive experience in exporting P11 seamless pipe worldwide, ensuring timely and secure delivery.
- Customization & Technical Support: We provide cut-to-length services, custom orders, and expert technical assistance to help you select the right solution for your specific requirements.
Related Products to ASTM A335 P22 Pipes
Explore our comprehensive range of alloy steel pipes and related products for high-temperature service:
- ASTM A335 P1 Alloy Steel Pipes
- ASTM A335 P2 Alloy Steel Pipes
- ASTM A335 P5 Alloy Steel Pipes
- ASTM A335 P9 Alloy Steel Pipes
- ASTM A335 P12 Alloy Steel Pipes
- ASTM A335 P22 Alloy Steel Pipes
- ASTM A335 P91 Alloy Steel Pipes
- ASTM A335 P92 Alloy Steel Pipes
- ASTM A213 T11 Seamless Tubes
Other Alloy Steel Pipes & Tubes for diverse applications.
Get Your ASTM A335 P11 Pipes Price & Consultation
For the latest Price, detailed technical specifications, or to discuss your project requirements for ASTM A335 P11 Pipes, contact the alloy steel experts at Amardeep Steel Centre today. We are committed to providing high-quality ASTM A335 P11 Alloy Steel Seamless Pipes and tailored solutions for your high-temperature applications, backed by a clear understanding of P11 material and its critical P11 chemical composition.
FAQ’s About ASTM A335 P11 Alloy Steel Seamless Pipes
1. What is ASTM A335 P11 material?
ASTM A335 P11 is a seamless alloy steel pipe made with about 1.25% chromium and 0.5% molybdenum (often called "Chrome-Moly"). It's designed for high-temperature service and has a minimum tensile strength of 415 MPa.
2. What is the P11 material equivalent to?
P11 (UNS K11597) is similar to grades like DIN 13CrMo44 (German), EN 1.7335 (European), and JIS STBA22 (Japanese). Its ASME equivalent is SA335 Grade P11.
3. What is the tensile strength of A335 P11?
ASTM A335 P11 pipe has a minimum tensile strength of 415 MPa (60,000 psi) and a minimum yield strength of 205 MPa (30,000 psi).
4. What is the hardness of the P11 pipe?
The hardness of P11 pipe typically should not exceed 250 HBW (Brinell) or 25 HRC (Rockwell C), depending on the specific heat treatment and standard requirements.
5. What is the temperature range of A335 P11?
P11 pipe is suitable for continuous service at wall temperatures up to approximately 590°C (1094°F), making it ideal for steam boilers and pressure vessels.
6. Is P11 material magnetic?
Yes, as a ferritic alloy steel, P11 material is magnetic. This property can be relevant in applications like transformers and electric motors.
7. What is P11 material composition?
P11 material is primarily an alloy of iron with 1.00-1.50% Chromium (Cr) and 0.44-0.65% Molybdenum (Mo), along with controlled amounts of carbon, manganese, and silicon, which give it strength at high temperatures.