ASME SA335 Alloy Steel Pipes Grades P5/P9/P11/P22/P91 Manufacturer, Supplier & Exporter in India – Mcneil Instruments
Mcneil Instruments is a leading manufacturer, supplier, and exporter of ASME SA335 Alloy Steel Pipes in India, offering durable and high-strength piping solutions built for high-temperature and high-pressure applications. Our range includes ASME SA335 Grade P5, P9, P11, P22, and P91 Alloy Steel Pipes, designed to meet global industrial standards for power generation, refineries, petrochemicals, and energy sectors.
Each pipe is precision-engineered under ASTM A335 / ASME SA335 standards, ensuring dimensional accuracy, corrosion resistance, and excellent mechanical strength for efficient performance in demanding conditions.
Grades We Offer
We are recognized as a leading manufacturer and supplier of P5, P9, P11, P22, and P91 grade alloy steel pipes designed to perform in demanding environments. We supply seamless alloy steel pipes in the following ASME SA335 grades:
P5 Pipes
P9 Pipes
P11 Pipes
P22 Pipes
P91 Pipes
ASME SA335 Grade P5 Alloy Steel Pipes
P5 Alloy Steel Pipes are ideal for high-temperature environments where oxidation and scaling resistance are crucial. These pipes offer excellent durability and are widely used in boilers, heat exchangers, and refineries.
✅ Technical Specification
| Parameter | Specification |
| Composition | Chromium 4–6%, Molybdenum 0.45–0.65% |
| Temperature Range | Up to 600°C |
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 205 MPa |
| Hardness | ≤ 85 HRB |
| Standards | ASTM A335 / ASME SA335 |
Key Highlights:
- Superior resistance to scaling and oxidation
- High mechanical strength under elevated temperatures
- Ideal for superheaters, boilers, and high-pressure systems
ASME SA335 Grade P9 Alloy Steel Pipes
P9 Alloy Steel Pipes offer outstanding creep resistance, high strength, and stability under extreme pressure and temperature. They are suitable for steam systems, refinery lines, and power generation units.
✅ Technical Specification
| 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 |
Key Highlights:
- Excellent performance in prolonged high-temperature conditions
- Resistant to oxidation and thermal fatigue
- Used in refinery heaters, steam lines, and chemical plants
ASME SA335 Grade P11 Alloy Steel Pipes
P11 Alloy Steel Pipes provide an ideal balance between toughness, weldability, and strength. These pipes are trusted for pressure vessels, heat exchangers, and power plant piping systems.
✅ Technical Specification
| 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 |
Key Highlights:
- Excellent weldability and oxidation resistance
- Retains shape and strength under thermal stress
- Commonly used in boilers, steam lines, and heat exchangers
ASME SA335 Grade P22 Alloy Steel Pipes
P22 Alloy Steel Pipes are known for their superior strength, creep resistance, and fatigue endurance. These pipes are built to perform in high-pressure, high-temperature conditions such as boilers, power plants, and petrochemical facilities.
✅ Technical Specification
| Parameter | Specification |
| Composition | Chromium 1.9–2.6%, Molybdenum 0.87–1.13% |
| Temperature Range | Up to 650°C |
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 205 MPa |
| Hardness | ≤ 90 HRB |
| Standards | ASTM A335 / ASME SA335 |
Key Highlights:
- Excellent resistance to thermal creep and fatigue
- Long service life under high-temperature exposure
- Ideal for refineries, reheaters, and industrial furnaces
ASME SA335 Grade P91 Alloy Steel Pipes
P91 Alloy Steel Pipes are the most advanced and durable grade in the ASME SA335 series. With a composition that includes Chromium, Molybdenum, Vanadium, and Niobium, these pipes provide exceptional strength, oxidation resistance, and creep rupture performance.
✅ Technical Specification
| Parameter | Specification |
| Composition | Chromium 8–9.5%, Molybdenum 0.85–1.05%, Vanadium & Niobium |
| Temperature Range | Up to 700°C |
| Tensile Strength | ≥ 620 MPa |
| Yield Strength | ≥ 440 MPa |
| Hardness | ≤ 100 HRB |
| Standards | ASTM A335 / ASME SA335 |
Key Highlights:
- Outstanding mechanical strength and durability
- Excellent resistance to oxidation and corrosion
- Perfect for turbines, ultra-high-pressure steam systems, and boilers
Why Choose Mcneil Instruments?
✔ ISO/CE-certified manufacturing with strict quality control
✔ CNC-processed pipes ensuring dimensional precision and leak-proof connections
✔ Wide range of custom sizes, wall thicknesses, and pressure ratings
✔ Full material traceability with MTC certification
✔ Robust export packaging and on-time international delivery
Applications Across Industries
🔹 Power Plants: Steam lines, boilers, and heat transfer systems
🔹 Oil & Gas: Refineries, offshore pipelines, and high-pressure networks
🔹 Petrochemical Plants: Process reactors and heaters
🔹 Boiler Systems: Superheaters and reheaters
🔹 Energy & Thermal Plants: Long-term high-temperature piping
🔹 Industrial Furnaces: High oxidation resistance applications
Contact Us
Looking for ASME SA335 Alloy Steel Pipes in India?
Mcneil Instruments offers P5, P9, P11, P22, and P91 Alloy Steel Pipes engineered for superior performance, strength, and thermal resistance.
📞 Get in touch today for expert technical advice, custom manufacturing options, and competitive pricing for your industrial needs.
FAQs
What are ASME SA335 Alloy Steel Pipes used for?
ASME SA335 Alloy Steel Pipes are designed for high-pressure and high-temperature applications. They are widely used in power plants, refineries, petrochemical units, boilers, and energy systems due to their exceptional strength, thermal resistance, and durability.
What grades are available in ASME SA335 Alloy Steel Pipes?
Mcneil Instruments supplies ASME SA335 Alloy Steel Pipes in five major grades — P5, P9, P11, P22, and P91, each engineered for specific temperature ranges and operational needs.
What is the difference between the grades P5, P9, P11, P22, and P91?
P5: Excellent for boilers and heaters (up to 600°C)
P9: Strong oxidation resistance, ideal for refineries and steam systems (up to 650°C)
P11: Great weldability and toughness for heat exchangers and power plants
P22: Superior creep resistance and fatigue endurance (up to 650°C)
P91: Highest strength and oxidation stability for turbines and ultra-high-pressure systems (up to 700°C)
What standards do ASME SA335 Alloy Steel Pipes follow?
All pipes are manufactured under ASTM A335 / ASME SA335 specifications, ensuring global compliance for ferritic alloy steel seamless pipes used in elevated temperature services.
Are ASME SA335 Alloy Steel Pipes suitable for welding?
Yes. These pipes are highly weldable and can be fabricated easily with appropriate preheating and post-weld heat treatment, maintaining mechanical strength and minimizing cracking.
What are the key benefits of using ASME SA335 Alloy Steel Pipes?
High tensile and yield strength
Excellent corrosion and oxidation resistance
Long service life under extreme heat and pressure
Reliable for continuous and cyclic temperature operations
Which industries commonly use ASME SA335 Alloy Steel Pipes?
These pipes are used across industries like:
Power Generation and Thermal Plants
Oil & Gas Refineries
Petrochemical Processing Units
Boilers and Steam Lines
Industrial Furnaces and Reactors