ASTM A335 P9 Alloy Steel Seamless Pipes | Seamless Ferritic Alloy-Steel P9 Pipe
At ASC LLP, we take pride in offering high-quality ASTM A335 P9 pipes to meet the diverse needs of our clients across industries. These seamless ferritic alloy-steel pipes are specifically designed for high-temperature service, making them a popular choice in industries like power generation, petrochemicals, and oil and gas. Below, we delve into the key features, benefits, and technical specifications of ASTM A335 P9 pipes to provide you with a comprehensive understanding of this product.
What Are ASTM A335 P9 Pipes?
ASTM A335 P9 pipes, also known as ASME SA335 P9 pipes, are seamless ferritic alloy-steel pipes engineered for high-temperature applications. These pipes are part of the Chrome Moly Alloy family, which combines chromium and molybdenum for enhanced strength, corrosion resistance, and heat tolerance.
Key Features:
- High-temperature resistance
- Superior mechanical strength
- Excellent corrosion resistance
- Compatibility with extreme environments
These attributes make ASTM / ASME A/SA P9 pipes an ideal choice for industries requiring durable and efficient piping solutions.

Advantages of ASTM A335 P9 Pipes
Investing in ASME SA335 P9 pipes offers numerous benefits, including:
- Durability: With high tensile strength and yield strength, these pipes provide long-lasting performance.
- Corrosion Resistance: The chromium content ensures excellent resistance to oxidation and corrosion.
- Heat Tolerance: Ideal for applications involving extreme temperatures.
- Versatility: Suitable for a variety of industrial applications.
Types of ASTM A335 P9 Pipes Available at ASC LLP
At ASC LLP, we offer a wide range of A335/SA335 seamless P9 pipes to meet diverse industrial needs. Our product range includes:
- Alloy Steel P9 Square Pipes: Ideal for structural and mechanical applications.
- Low Alloy ASTM A335 P9 Steel Pipe: Engineered for high-temperature and high-pressure environments.
- SA 335 Grade P9 Chrome Moly Pipe Equivalent Material: Designed to meet specific industry standards.


Schedule and Size Chart for ASTM A335 P9 Pipes
Nominal Pipe Size (NPS) | Outer Diameter (OD) | Wall Thickness (WT) (SCH 40) | Wall Thickness (WT) (SCH 80) |
1/2″ | 21.3 mm | 2.77 mm | 3.73 mm |
1″ | 33.4 mm | 3.38 mm | 4.55 mm |
2″ | 60.3 mm | 5.54 mm | 7.01 mm |
4″ | 114.3 mm | 6.02 mm | 8.56 mm |
ASME SA335 Mechanical Properties Chart
Property | Value |
Tensile Strength | ≥ 445 MPa |
Yield Strength | ≥ 295 MPa |
Elongation | Minimum 30% |
Hardness (Max) | 163 HB |
Technical Specifications of ASME SA335 P9 pipes
Parameter | Details |
Standard | ASTM A335, ASME SA335 |
Grade | P9 |
Outer Diameter | 1/4” – 24” |
Wall Thickness | SCH 40 – SCH 160, XXS |
Length | Single Random, Double Random |
Ends | Plain, Beveled, Threaded |
Chemical Requirements for ASME SA335 P9 Pipes
Element | Composition (%) |
Carbon | 0.05 – 0.15 |
Manganese | 0.30 – 0.60 |
Phosphorus | ≤0.025 |
Sulfur | ≤0.025 |
Silicon | 0.50 max |
Chromium | 8.00 – 10.00 |
Molybdenum | 0.90 – 1.10 |
Low Alloy ASTM A335 P9 Physical Properties Chart
Property | Value |
Density | 7.8 g/cm³ |
Melting Point | ~1390-1440°C |
Thermal Conductivity | 26 W/m.K |
Electrical Resistivity | 1.25 μΩ.m |
Heat Treatment Chart for ASTM A335 P9 Pipes
Heat Treatment Type | Temperature Range (°C) | Cooling Method |
Normalizing | 900 – 950 | Air cooling |
Tempering | 650 – 750 | Controlled cooling |
Stress Relieving | 600 – 650 | Slow cooling in furnace |
Annealing (Optional) | 800 – 850 | Furnace cooling |
Applications of ASTM A335 P9 Pipes
Industry | Application Areas |
Power Generation | Boiler systems, superheaters, reheaters |
Petrochemical | Process piping, refinery systems |
Oil and Gas | Pipeline transportation, heat exchangers |
Marine | Heat-resistant piping systems |
Aerospace | High-performance exhaust systems |
ASTM A335 P9 Pipe Equivalent Materials
When considering alternatives, it’s crucial to choose materials that match the chemical and mechanical properties of A335 P9. Common equivalents include EN 10216-2 X10CrMoVNb9-1 and DIN 17175 10CrMo910.
Why Choose ASC LLP for ASME SA335 P9 Pipes?
ASC LLP is a leading supplier of high-quality ASTM A335 P9 Alloy Steel Seamless Pipes. Here’s why clients trust us:
- Quality Assurance: We ensure all our products meet stringent international standards.
- Custom Solutions: Tailored solutions to meet specific client requirements.
- Competitive Pricing: Affordable rates without compromising on quality.
- Global Reach: Reliable supply chain and prompt delivery worldwide.
For more details or to place an order for ASME SA335 P9 pipes, contact ASC LLP today. Our team of experts is here to help you find the perfect piping solution for your needs.
Global Reach
Amardeep Steel Centre boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality ASTM A335 P9 Pipes. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.

Countries We Export To
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