ASTM A335 P5, P9, P11, P22, P91 Pipe Manufacturer, Supplier, and Exporter in India
ASTM A335 P5 Pipe, P9 Alloy Steel Pipe, P11 Alloy Steel Pipe, P22 Chrome Moly Pipe, P91 High Temperature Pipe, Alloy Steel Seamless Pipe, ASTM A335 Alloy Steel Pipe, High Pressure Boiler Pipe, Alloy Steel Pipe Manufacturer in India, A335 Grade P Pipes Supplier.
Mcneil Instruments is a leading manufacturer and exporter of Alloy Steel Pipes conforming to ASTM A335 and ASME SA335 standards, specializing in Grade P5, P9, P11, P22, and P91 pipes. Our offerings include Carbon Grade Pipes, Chrome Moly Pipes, and Molybdenum Grade Pipes, certified under ISO 9001:2008, we provide high-quality chrome moly pipes suitable for high-temperature applications in the power, petrochemical, and energy sectors. We maintain a robust inventory and offer protective finishes including black painting, anti-corrosion oil, and galvanization for long-lasting durability.
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
Carbon, Chrome Moly & Molybdenum Grade Pipes – ASTM A335 / ASME SA335 P-Series Pipes by Material Composition
Mcneil Instruments offers a wide variety of Alloy Steel Pipes categorized by material composition and industry standards. Our ASTM A335 and ASME SA335 P-Series Pipes are available in Carbon Grade, Chrome Moly, and Molybdenum Grade variants — each engineered to meet high-temperature, high-pressure service conditions.
Below are the various material grades we supply:
Carbon Grade Pipes
- Carbon Grade P5 Pipes – Ideal for moderate-temperature applications requiring high toughness.
- Carbon Grade P9 Pipes – Used in heat exchangers and refineries for stable thermal performance.
- Carbon Grade P11 Pipes – Suited for boiler systems and power plant piping.
- Carbon Grade P22 Pipes – Offers excellent weldability and oxidation resistance.
- Carbon Grade P91 Pipes – High creep strength and superior thermal resistance.
Molybdenum Grade Pipes
- Molybdenum Grade P5 Pipes – Enhances strength and corrosion resistance in high-stress systems.
- Molybdenum Grade P9 Pipes – Designed for applications involving elevated temperatures.
- Molybdenum Grade P11 Pipes – Delivers long-term durability in power and petrochemical plants.
- Molybdenum Grade P22 Pipes – Ensures structural integrity in extreme heat environments.
- Molybdenum Grade P91 Pipes – A top choice for critical applications like superheaters and steam pipelines.
Chrome Moly Pipes
- Chrome Moly P5 Pipes – Combines chromium and molybdenum for strength and oxidation resistance.
- Chrome Moly P9 Pipes – Frequently used in the construction of pressure vessels.
- Chrome Moly P11 Pipes – Balances weldability, strength, and cost-effectiveness.
- Chrome Moly P22 Pipes – Popular in power generation and thermal plants.
- Chrome Moly P91 Pipes – Suitable for ultra-high-pressure and high-temperature operations.
These pipes meet the rigorous specifications of ASTM A335 and ASME SA335 standards, ensuring global compliance, quality, and reliability. Whether you require Carbon Steel Pipes, Chrome Moly Pipes, or Molybdenum-based Alloy Pipes, Mcneil Instruments has the right solution for your project. These pipes are known for their high toughness, wear resistance, and ability to withstand elevated temperatures. Chrome content ranges from 1.00% to 10.00%, and molybdenum from 0.44% to 1.10% depending on the grade
Comprehensive Grade Comparison – ASTM A335 / ASME SA335 Pipes
| Grade | ASTM Standard | ASME Standard | Carbon Grade | Chrome Moly | Molybdenum Grade |
| P5 | ASTM A335 P5 | ASME SA335 P5 | ✔️ P5 | ✔️ P5 | ✔️ P5 |
| P9 | ASTM A335 P9 | ASME SA335 P9 | ✔️ P9 | ✔️ P9 | ✔️ P9 |
| P11 | ASTM A335 P11 | ASME SA335 P11 | ✔️ P11 | ✔️ P11 | ✔️ P11 |
| P22 | ASTM A335 P22 | ASME SA335 P22 | ✔️ P22 | ✔️ P22 | ✔️ P22 |
| P91 | ASTM A335 P91 | ASME SA335 P91 | ✔️ P91 | ✔️ P91 | ✔️ P91 |
Technical Specifications:
Each ASTM A335 grade—P5, P9, P11, P22, and P91—is manufactured to meet global standards. We are a leading supplier and exporter of chrome moly seamless pipes in these grades.
Chemical Composition (%):
| Grade | C | Mn | P (max) | S (max) | Si | Cr | Mo |
| P5 | 0.15 max | 0.30–0.60 | 0.025 | 0.025 | 0.50 max | 4.00–6.00 | 0.45–0.65 |
| P9 | 0.15 max | 0.30–0.60 | 0.025 | 0.025 | 0.25–1.00 | 8.00–10.00 | 0.90–1.10 |
| P11 | 0.05–0.15 | 0.30–0.60 | 0.025 | 0.025 | 0.50 max | 1.00–1.50 | 0.44–0.65 |
| P22 | 0.05–0.15 | 0.30–0.60 | 0.025 | 0.025 | 0.50 max | 1.90–2.60 | 0.87–1.13 |
| P91 | 0.08–0.12 | 0.30–0.60 | 0.020 | 0.010 | 0.20–0.50 | 8.00–9.50 | 0.85–1.05 |
Mechanical Properties:
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Impact Energy (J) | Hardness (HB) |
| P5 | ≥ 415 | ≥ 205 | ≥ 22 | ≥ 35 | ≤ 187 |
| P9 | ≥ 585 | ≥ 275 | ≥ 30 | ≥ 35 | ≤ 250 |
| P11 | ≥ 415 | ≥ 205 | ≥ 22 | ≥ 35 | ≤ 163 |
| P22 | ≥ 415 | ≥ 205 | ≥ 22 | ≥ 35 | ≤ 163 |
| P91 | 585–760 | 415–585 | ≥ 20 | ≥ 35 | ≤ 250 |
Heat Treatment Requirements
| Grade | Treatment Type | Normalizing Temp (°F) | Tempering Temp (°F) |
| P5 | Normalize & Temper / Full Anneal | – | 1250 [675] |
| P5c | Subcritical Anneal | – | 1325–1375 [715–745] |
| P9 | Normalize & Temper / Full Anneal | – | 1250 [675] |
| P11 | Normalize & Temper / Full Anneal | – | 1200 [650] |
| P22 | Normalize & Temper / Full Anneal | – | 1250 [675] |
| P91 | Normalize & Temper / Quench and Temper | 1900–1975 [1040–1080] | 1350–1470 [730–800] |
Comparative Chemical Composition of ASTM A335 Alloy Steel Pipe Grades (P5, P9, P11, P22)
| Element | P5 (%) | P9 (%) | P11 (%) | P22 (%) |
| C | 0.05–0.15 | 0.05–0.15 | 0.05–0.15 | 0.05–0.15 |
| Cr | 4.00–6.00 | 8.00–10.00 | 1.00–1.50 | 1.90–2.60 |
| Mn | 0.30–0.60 | 0.30–0.60 | 0.30–0.60 | 0.30–0.60 |
| Mo | 0.45–0.65 | 0.90–1.10 | 0.44–0.65 | 0.87–1.13 |
| P | 0.025 max | 0.025 max | 0.025 max | 0.025 max |
| S | 0.025 max | 0.025 max | 0.025 max | 0.025 max |
| Si | 0.50–1.00 | 0.25–1.00 | 0.50 max | 0.50 max |
ASTM A335 Alloy Steel Pipes – Grade-Wise Product Range
We manufacture and supply ASTM A335 Alloy Steel Pipes in multiple grade variants suitable for high-pressure, high-temperature applications.
Available Grades:
- ASTM A335 Grade P5 Alloy Steel Pipe
- ASTM A335 Grade P9 Alloy Steel Pipe
- ASTM A335 Grade P11 Alloy Steel Pipe
- ASTM A335 Grade P22 Alloy Steel Pipe
- ASTM A335 Grade P91 Alloy Steel Pipe
Also available in:
| Chrome Moly Pipes | Carbon Grade Pipes | Molybdenum Grade Pipes |
| ASTM A335 P5 Chrome Moly Pipe | ASTM A335 Carbon Grade P5 Pipe | ASTM A335 Molybdenum Grade P5 Pipe |
| ASTM A335 P9 Chrome Moly Pipe | ASTM A335 Carbon Grade P9 Pipe | ASTM A335 Molybdenum Grade P9 Pipe |
| ASTM A335 P11 Chrome Moly Pipe | ASTM A335 Carbon Grade P11 Pipe | ASTM A335 Molybdenum Grade P11 Pipe |
| ASTM A335 P22 Chrome Moly Pipe | ASTM A335 Carbon Grade P22 Pipe | ASTM A335 Molybdenum Grade P22 Pipe |
| ASTM A335 P91 Chrome Moly Pipe | ASTM A335 Carbon Grade P91 Pipe | ASTM A335 Molybdenum Grade P91 Pipe |
ASME SA335 Alloy Steel Pipes – Grade-Wise Product Range
Our ASME SA335 Alloy Steel Pipes deliver consistent performance across industrial applications, from power plants to petrochemical systems.
Available Grades:
- ASME SA335 Grade P5 Alloy Steel Pipe
- ASME SA335 Grade P9 Alloy Steel Pipe
- ASME SA335 Grade P11 Alloy Steel Pipe
- ASME SA335 Grade P22 Alloy Steel Pipe
- ASME SA335 Grade P91 Alloy Steel Pipe
Also available in:
| Chrome Moly Pipes | Carbon Grade Pipes | Molybdenum Grade Pipes |
| ASME SA335 P5 Chrome Moly Pipe | ASME SA335 Carbon Grade P5 Pipe | ASME SA335 Molybdenum Grade P5 Pipe |
| ASME SA335 P9 Chrome Moly Pipe | ASME SA335 Carbon Grade P9 Pipe | ASME SA335 Molybdenum Grade P9 Pipe |
| ASME SA335 P11 Chrome Moly Pipe | ASME SA335 Carbon Grade P11 Pipe | ASME SA335 Molybdenum Grade P11 Pipe |
| ASME SA335 P22 Chrome Moly Pipe | ASME SA335 Carbon Grade P22 Pipe | ASME SA335 Molybdenum Grade P22 Pipe |
| ASME SA335 P91 Chrome Moly Pipe | ASME SA335 Carbon Grade P91 Pipe | ASME SA335 Molybdenum Grade P91 Pipe |
Why Choose Mcneil Instruments?
- ISO Certified manufacturer
- Global supply chain and prompt delivery
- Advanced quality testing procedures
- Customized stock & cutting services
- Competitive pricing for bulk orders
Call to Action
Looking for a reliable P5 Alloy Steel Pipe Supplier, P11 Chrome Moly Pipe Exporter, or P91 Pipe Manufacturer in India? Contact Mcneil Instruments today for best-in-class pricing, immediate stock availability, and global shipping.
FAQs
Who is the top manufacturer and supplier of ASTM A335 P-grade alloy steel pipes?
Mcneil Instruments is a trusted manufacturer, supplier, and exporter of ASTM A335 P5, P9, P11, P22, and P91 pipes, known for quality and global delivery.
What industries use ASTM A335 P-grade pipes?
Power generation, petrochemicals, oil & gas, and boiler manufacturing.
What are the differences between P5 and P91 Alloy Steel Pipes?
P5 and P91 Alloy Steel Pipes differ mainly in their chemical composition, mechanical properties, and temperature resistance.
- P5 pipes contain chromium (4-6%) and molybdenum (0.45-0.65%), suitable for moderate high-temperature service.
- P91 pipes have enhanced levels of chromium (8-9%) and added vanadium and niobium, making them ideal for extreme temperature and pressure applications. P91 also offers higher creep strength and longer service life in power generation and petrochemical environments.
Are ASME SA335 and ASTM A335 standards interchangeable?
ASME SA335 and ASTM A335 standards are often considered equivalent in material specifications, but they serve different regulatory purposes.
- ASTM A335 is a standard specification for seamless ferritic alloy-steel pipe for high-temperature service.
- ASME SA335 is the pressure vessel code version of the same specification, approved for use in ASME-certified boilers and pressure vessels. While they share the same grades and chemistry, SA335 is used in code-stamped applications that require ASME compliance.
Do you offer third-party inspection and testing certificates?
Absolutely. We provide test reports and third-party inspection approvals.
Are these pipes suitable for high-pressure and high-temperature conditions?
Yes. Their chrome-moly composition makes them ideal for elevated conditions.
Can Mcneil Instruments export to the Middle East and Europe?
Yes, we export globally with a presence in over 30+ countries.