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Home > Products > Industrial Metal Pipe > API 5L Pipes > ASTM A335 P11 Pipe
ASTM A335 P11 Alloy Steel Pipes – High-Quality Manufacturer and Supplier from Kwality Steelage Pvt. Ltd., Mumbai, India
Kwality Steelage Pvt. Ltd., based in Mumbai, India, is a premier manufacturer and supplier of ASTM A335 P11 Alloy Steel Seamless Pipes. Our P11 pipes, also known as “1 ¼ Chrome” pipes, are designed to withstand high temperatures and pressures, making them ideal for demanding applications in industries such as oil refineries, petrochemical plants, power plants, and marine engineering. These pipes are made from high-quality chrome-moly alloy, containing chromium (1.00-1.50%) and molybdenum (0.44-0.65%), which enhances the material’s strength, wear resistance, and high-temperature resilience. Our P11 pipes are available in a range of sizes from ½ inch to 24 inches, with customizable lengths up to 12 meters.
The ASTM A335 P11 pipes we offer are crafted using seamless manufacturing techniques, including both hot rolling and cold drawing processes, ensuring precision and reliability. The mechanical properties of these pipes include a minimum tensile strength of 415 MPa and a minimum yield strength of 205 MPa, with an elongation range of 20-30%. This robust design enables the pipes to endure extensive wear and high-stress conditions, making them suitable for pipe fittings such as elbows, tees, reducers, and flanges, manufactured per ASTM A234 WP11 and ASTM A182 F11 standards.
Kwality Steelage’s P11 pipes comply with various international standards, including ASME SA335 and ASTM A335, ensuring compatibility with diverse industrial applications. These pipes are available in standard thicknesses such as SCH 40, SCH 80, SCH 160, XS, and XXS, and can be finished with options like beveled or plain ends. To further enhance corrosion resistance, we provide surface treatments, including 3LPE, FBE, and anti-corrosion oil coatings, ensuring long-lasting performance even in corrosive environments.
In addition to standard applications, ASTM A335 P11 pipes are widely used in high-temperature and high-pressure applications, such as jet engines, nuclear reactors, and power plant turbines, due to their excellent heat tolerance and high durability. Our P11 pipes are also ferromagnetic, making them suitable for transformers and electric motors where magnetic properties are essential. For optimal weld quality, post-weld heat treatment (PWHT) is recommended for P11 pipes over 13 mm in thickness, while preheating to 120°C is sufficient for thinner sections.
As a trusted supplier of high-grade alloy steel P11 pipes, Kwality Steelage Pvt. Ltd. supports a global customer base, ensuring timely delivery and adherence to quality standards. We maintain an extensive stock to meet urgent demands and provide customization to meet specific project requirements. Contact us today to discuss your requirements and receive a quote for ASTM A335 P11 Alloy Steel Pipes tailored to your needs.
| Specification | Details |
| Size Range | 1/8 to 30 inch NB |
| Schedule Thickness Range | SCH 40, SCH 80, SCH 160, XS, XXS, All Schedules |
| Applications | Oil Refineries, Petrochemical Industries, Power Plants, Boilers, Chemical Industries, Marine and Shipbuilding, Fluid and Gas Transmission |
| Pipe Type | Seamless |
| Pipe & Tube Form | Round, Square, Rectangular, Hydraulic Pipes |
| Manufacturing Process | Hot-Finished, Cold Drawn, Heat Treated (Annealed, Normalized, Quenched, and Tempered) |
| Material Composition | Alloy Steel with Chromium (1.00-1.50%), Molybdenum (0.44-0.65%) |
| End Type | Plain, Beveled, Threaded |
| Length Options | Single, Double Random, Custom Lengths (up to 12 meters) |
| End Protection | Plastic Caps |
| Outside Coating | Anti-Corrosion Oil, Black Painting |
| Tolerance Type | Outside Diameter (OD) | Wall Thickness (WT) |
| Size Tolerance | +1% / -1% of specified OD | +12.5% / -10% of specified WT |
| Outside Diameter (mm) | Wall Thickness (mm) | Nominal Size (in.) | Schedule | Weight (Kg/m) |
| 13.72 | 1.65 | 1/4 | SCH 40 | 0.52 |
| 21.34 | 3.73 | 1/2 | SCH 80 | 1.70 |
| 60.33 | 7.11 | 2 | SCH 160 | 9.58 |
| 88.90 | 11.13 | 3 | SCH 160 | 21.80 |
| 168.28 | 18.26 | 6 | SCH 160 | 69.00 |
Note: Additional sizes and weights are available upon request.
| Grade | Yield Strength (Min) | Tensile Strength (Min) | Elongation (%) |
| P11 | 205 MPa | 415 MPa | 20-30 |
| Element | % Composition |
| Carbon (C) | 0.05-0.15% |
| Manganese (Mn) | 0.30 – 0.60% |
| Phosphorus (P) | 0.025% max |
| Sulfur (S) | 0.025% max |
| Silicon (Si) | 0.50 – 1.00% |
| Chromium (Cr) | 1.00 – 1.50% |
| Molybdenum (Mo) | 0.44 – 0.65% |
| Pipe Type | Price Range (USD) |
| ASTM A335 P11 Seamless Pipes | $750 – $1,700 |
For welding ASTM A335 P11 pipes, precise handling is essential to maintain structural integrity and prevent excessive hardness. Post-Weld Heat Treatment (PWHT) is recommended for thicker pipes, particularly over 13 mm, while preheating to around 120°C is typically sufficient for thinner sections. This treatment minimizes residual stress and ensures strong, durable connections in high-temperature environments.
| Feature | P11 | P22 |
| Carbon Content | 0.05-0.15% | 0.05-0.15% |
| Yield Strength | 205 MPa | 310 MPa |
| Applications | High-Temperature, Moderate Pressure | High-Temperature, High Pressure |
Contact Kwality Steelage Pvt. Ltd. for a quote on ASTM A335 P9 Alloy Steel Pipes tailored to meet your high-temperature application needs.
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We Kwality Steelage Pvt. Ltd. are professionally organized firm engaged in exporting and supplying Stainless Steel, Carbon Steel, Alloy Steel, Nickel Alloys, Duplex, Super duplex and other Ferrous & Non-Ferrous Metal products such as Pipes, tubes, Pipe, Tubes, Pipe Fittings, Piping Spools, LR Bends, Sheets, Plates, Rods, Flanges, Fasteners, Gaskets.
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