ASTM A335 Alloy Steel Grade-P Pipes Manufacturer, Supplier & Exporter in India – Mcneil Instruments
Mcneil Instruments is a trusted manufacturer, supplier, and exporter of ASTM A335 Alloy Steel Pipes in India, providing high-quality piping solutions for high-temperature and high-pressure industrial applications. Our product range covers ASTM A335 / ASME SA335 Alloy Steel Grade P5, P9, P11, P22, and P91 Pipes, designed for superior mechanical performance, durability, and resistance to corrosion and oxidation.
Each pipe is engineered with precision and tested under stringent international quality standards, ensuring long-lasting reliability in power plants, refineries, and petrochemical industries.
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 ASTM A335 grades:
P5 Pipes
P9 Pipes
P11 Pipes
P22 Pipes
P91 Pipes
ASTM A335 Grade P5 Alloy Steel Pipes
A335 P5 Alloy Steel Pipes are built for elevated temperature and high-pressure environments, delivering excellent thermal stability and mechanical strength. Commonly used in refineries, chemical plants, and power generation units.
✅ 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:
- Excellent resistance to oxidation and corrosion
- High mechanical strength under thermal stress
- Ideal for boilers, heaters, and high-pressure pipelines
ASTM A335 Grade P9 Alloy Steel Pipes
A335 P9 Alloy Steel Pipes provide outstanding creep resistance and dimensional stability at high temperatures. Suitable for steam systems, refinery heaters, and process piping.
✅ 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 high-temperature oxidation resistance
- Stable performance under continuous heat exposure
- Widely used in heat exchangers, superheaters, and pipelines
ASTM A335 Grade P11 Alloy Steel Pipes
A335 P11 Pipes strike a balance between ductility, strength, and corrosion resistance, making them highly reliable for steam lines and pressure systems in power plants and chemical industries.
✅ 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:
- High weldability and structural integrity
- Resistant to oxidation and thermal fatigue
- Commonly used in heat exchangers and pressure vessels
ASTM A335 Grade P22 Alloy Steel Pipes
A335 P22 Pipes combine toughness, creep strength, and fatigue resistance, making them a preferred choice for boilers, reheaters, and power plant systems.
✅ 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 long-term strength under cyclic temperatures
- Reliable for superheater and reheater tubes
- Superior oxidation and corrosion resistance
ASTM A335 Grade P91 Alloy Steel Pipes
A335 P91 Pipes are designed for extreme heat and pressure applications, offering unmatched mechanical strength and thermal stability due to the addition of Chromium, Molybdenum, Vanadium, and Niobium.
✅ 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:
- Exceptional mechanical strength and long-term durability
- High resistance to oxidation and creep
- Ideal for turbines, boilers, and ultra-high-pressure systems
Why Choose Mcneil Instruments?
✔ ISO/CE-certified production under strict quality assurance
✔ Precision machining ensuring perfect dimensional accuracy
✔ Available in custom wall thicknesses and pressure ratings
✔ 100% material traceability with MTC certification
✔ Global export packaging and on-time delivery
Applications Across Industries
🔹 Power Generation: Steam lines and turbine systems
🔹 Oil & Gas: High-pressure pipelines and refinery networks
🔹 Petrochemical: Process heaters, reactors, and exchangers
🔹 Boilers: Superheater and reheater tubes
🔹 Thermal Power Plants: High-temperature steam applications
🔹 Industrial Furnaces: Exceptional heat resistance
Contact Us
Looking for premium ASTM A335 Alloy Steel Pipes in India?
Mcneil Instruments supplies Grade P5, P9, P11, P22, and P91 Alloy Steel Pipes, trusted for strength, reliability, and performance under extreme operating conditions.
📞 Contact us today for expert consultation, customized specifications, and competitive quotes tailored to your project requirements.
FAQs
What is ASTM A335 Alloy Steel Pipe used for?
ASTM A335 Alloy Steel Pipes are used for high-temperature and high-pressure applications, such as in power plants, refineries, petrochemical industries, and boiler systems. These pipes deliver superior strength, corrosion resistance, and long-term durability under extreme operating conditions.
What are the different grades available in ASTM A335 Alloy Steel Pipes?
The main grades of ASTM A335 Alloy Steel Pipes include P5, P9, P11, P22, and P91. Each grade offers distinct mechanical and chemical properties suitable for specific temperature ranges and pressure requirements.
What is the difference between P5, P9, P11, P22, and P91 Alloy Steel Pipes?
P5: Best for high-temperature steam lines and heaters (up to 600°C)
P9: Offers superior oxidation resistance (up to 650°C)
P11: Combines strength with good weldability for power generation
P22: Ideal for reheaters and boilers with strong creep resistance
P91: Designed for ultra-high pressure and temperatures up to 700°C
Are ASTM A335 Alloy Steel Pipes suitable for welding and forming?
Yes, these pipes have excellent weldability and formability. With proper heat treatment and pre/post-weld procedures, they maintain strength and prevent cracking in welded joints.
What standards govern ASTM A335 Alloy Steel Pipes?
All pipes conform to ASTM A335 / ASME SA335 standards, ensuring compliance with global industrial specifications for ferritic alloy steel seamless pipes used in elevated temperature service.
What are the key benefits of using ASTM A335 Alloy Steel Pipes?
High tensile and yield strength
Excellent resistance to oxidation and corrosion
Reliable performance under fluctuating temperatures
Long service life and reduced maintenance costs
What testing and inspection processes are followed by Mcneil Instruments?
At Mcneil Instruments, all ASTM A335 Alloy Steel Pipes undergo rigorous non-destructive testing (NDT), hydrostatic tests, chemical analysis, and mechanical strength tests to ensure flawless quality and dimensional accuracy.