Mcneil Instruments INC is a trusted ASTM A335 Alloy Steel Pipe manufacturer, supplier, and exporter in Saudi Arabia, offering a complete range of chrome moly seamless pipes for high-temperature and high-pressure applications. Leading manufacturers produce alloy steel pipes in accordance with ASTM A335 / ASME SA335 standards to deliver exceptional durability, corrosion resistance, and long service life. With a large inventory and quick delivery options, we serve clients across Riyadh, Dammam, Jeddah, Jubail, and Yanbu, as well as across GCC and Middle Eastern countries.
What is ASTM A335 Alloy Steel Pipe?
According to ASTM A335, seamless ferritic alloy-steel pipes are designed for high-temperature service. Consequently, manufacturers ensure these pipes withstand elevated pressures and extreme temperatures, thereby making them ideal for critical applications in power generation, oil and gas refineries, petrochemical plants, and industrial boilers.
“Alloy steel” refers to steels alloyed with elements such as chromium (Cr) and molybdenum (Mo). These elements enhance mechanical strength, oxidation resistance, and creep strength — essential for pipes that operate under thermal stress. Because of these properties, ASTM A335 alloy steel pipes are the preferred choice for steam lines, pressure vessels, and heat exchangers in Saudi Arabia’s industrial sector.
ASTM A335 Pipe Grades and Specifications
The ASTM A335 standard includes several grades based on composition and performance requirements. Each grade is optimized for specific service conditions.
| Grade | Chromium (%) | Molybdenum (%) | Application |
|---|---|---|---|
| P1 | 0.50 | 0.44 | Low-temperature & general service |
| P5 | 4.00–6.00 | 0.44–0.65 | Refinery & petrochemical service |
| P9 | 8.00–10.00 | 0.90–1.10 | High-temperature piping |
| P11 | 1.00–1.50 | 0.44–0.65 | Boiler & pressure vessels |
| P22 | 1.90–2.60 | 0.87–1.13 | Superheater tubes & refineries |
| P91 | 8.00–9.50 | 0.85–1.05 | Ultra-high temperature applications |
Specifically, grades P11, P22, and P91 are the most commonly used in power plants and oil refineries. Therefore, manufacturers carefully heat-treat each pipe according to ASTM requirements, ensuring optimal tensile strength and hardness.
Chemical Composition and Mechanical Properties
The strength and heat resistance of ASTM A335 pipes come from their unique alloying composition. Chromium increases oxidation resistance, while molybdenum enhances tensile strength and prevents embrittlement.
| Property | Range |
|---|---|
| Tensile Strength | 415–620 MPa |
| Yield Strength | 205–415 MPa |
| Elongation | ≥ 20% |
| Hardness | ≤ 250 HB |
| Temperature Resistance | Up to 600°C (depending on grade) |
These properties make ASTM A335 alloy steel pipes ideal for boiler tubes, steam pipelines, and pressure vessels operating in high-temperature environments.
Manufacturing Process of ASTM A335 Alloy Steel Pipes
Our manufacturing process ensures precision, consistency, and adherence to global quality standards.
- Raw Material Selection: High-quality alloy steel billets sourced from approved mills.
- Seamless Pipe Production: The billets are pierced and rolled using a hot extrusion process to form seamless tubes.
- Heat Treatment: Pipes undergo normalizing, quenching, and tempering to improve mechanical properties.
- Testing & Inspection: Each pipe is subjected to hydrostatic testing, ultrasonic inspection, and eddy current testing.
- Dimensional & Visual Checks: Ensuring tight tolerances and surface finish.
- Marking & Certification: As per ASTM A335 and customer requirements (EN 10204 3.1 / 3.2).
By following strict QA/QC protocols, Mcneil Instruments INC guarantees defect-free, high-performance alloy steel pipes suitable for demanding industrial environments.
Applications of ASTM A335 Alloy Steel Pipes
Thanks to their superior temperature and pressure resistance, many industries in Saudi Arabia use ASTM A335 alloy steel pipes for critical applications.
- Power Plants: Superheater tubes, reheater lines, and steam pipelines.
- Oil Refineries: High-temperature crude oil transport and distillation columns.
- Petrochemical Industries: Process piping and heat exchanger systems.
- Boiler Manufacturing: Furnace tubes, economizers, and air preheaters.
- Fertilizer and Chemical Plants: Reactors and heat recovery units.
- Energy & Desalination Projects: Piping for high-pressure steam and condensate systems.
Their long life, corrosion resistance, and strength make these pipes the preferred choice for infrastructure and energy projects throughout the GCC region.
ASTM A335 vs Other Standards (A213, A333, A106)
Understanding the difference between ASTM A335 and other popular standards helps buyers choose the right product:
- ASTM A213: Covers boiler tubes made from ferritic and austenitic steel — typically used for heat exchangers but in smaller diameters.
- ASTM A333: Designed for low-temperature service, commonly used in cryogenic and refrigeration systems.
- ASTM A106: Specifies carbon steel seamless pipes, suitable for moderate temperature and pressure applications.
In contrast, leading manufacturers specifically engineer ASTM A335 pipes for high-temperature service. Consequently, these pipes deliver superior strength, enhanced thermal stability, and excellent oxidation resistance, making them essential for power generation and petrochemical industries. As a result, this combination makes them indispensable for use in power generation as well as, moreover, petrochemical plants.
Alloy Steel Pipe Supply in Saudi Arabia
Mcneil Instruments INC is among the largest stockists and distributors of ASTM A335 alloy steel pipes in Saudi Arabia. We maintain a comprehensive inventory in sizes ranging from ½” NB to 24” NB in schedules 40, 80, 160, and XXS.
We supply and deliver across:
- Riyadh – for energy projects and EPC contractors
- Dammam – serving refineries and fabrication shops
- Jubail – for petrochemical industries
- Jeddah and Yanbu – for oil & gas plants and maintenance contractors
With a robust logistics network, we ensure timely delivery, competitive pricing, and export-quality packaging for all shipments.
Why Choose Mcneil Instruments INC?
- ISO 9001:2015 Certified Manufacturer with full traceability and material certification.
- State-of-the-art production facility with advanced testing and heat treatment equipment.
- Experienced engineering team ensuring compliance with ASTM, ASME, and EN standards.
- Large ready stock of ASTM A335 P11, P22, and P91 grades.
- Global export experience across GCC, Europe, and Africa.
- Competitive pricing and customized solutions for large-scale industrial projects.
We focus on delivering reliable quality, fast service, and total customer satisfaction, establishing long-term partnerships with our clients.
Packing, Marking, and Shipping
All ASTM A335 alloy steel pipes are packed with utmost care to ensure product integrity during transit.
- Pipes are end-capped, poly-wrapped, and bundled with steel strips.
- For exports, pipes are packed in wooden boxes or crates to avoid mechanical damage.
- Each pipe is clearly marked with size, grade, heat number, and specification as per ASTM standards.
- Shipping available to all major ports in Saudi Arabia, UAE, Oman, and Kuwait.
Our dedicated export team ensures smooth documentation, customs clearance, and safe delivery to your project site.
ASTM A335 Alloy Steel Pipe Price in Saudi Arabia
The price of ASTM A335 alloy steel pipes depends on several factors:
- Grade (P11, P22, P91)
- Size and wall thickness
- Quantity and delivery location
- Surface finish and additional testing requirements
At Mcneil Instruments INC, we offer competitive prices without compromising on quality.
Contact our sales team today for the latest ASTM A335 alloy steel pipe price list in Saudi Arabia or to request a customized quotation for your project.
To learn more about our commitment to quality and industry expertise, visit our About Us page. For inquiries, quotations, or project support, please reach out through our Contact Us page — our team will be glad to assist you.
Conclusion
Mcneil Instruments INC stands as a leading ASTM A335 Alloy Steel Pipe Manufacturer, Supplier & Exporter in Saudi Arabia, providing top-quality pipes for the most demanding industrial applications. With decades of experience, certified production facilities, and strong logistics support, we deliver premium alloy steel pipes across Saudi Arabia and worldwide.
For more information or to request a quotation for ASTM A335 Alloy Steel Pipes, contact us today — we ensure high performance, reliability, and value in every product we deliver
FAQ – ASTM A335 Alloy Steel Pipe
1. What is ASTM A335 Alloy Steel Pipe?
ASTM A335 Alloy Steel Pipe provides seamless ferritic alloy-steel construction that handles high-temperature and high-pressure service. Moreover, it contains alloying elements such as chromium and molybdenum (Cr-Mo), which significantly enhance its strength, heat resistance, and oxidation resistance. These pipes are commonly used in power plants, refineries, and petrochemical industries.
2. What are the grades available in ASTM A335 pipes?
ASTM A335 pipes are available in several grades, including:
- P1 – General service, low-temperature use
- P5 / P9 – Refinery and petrochemical applications
- P11 / P22 – Boilers, heat exchangers, and superheaters
- P91 – High-pressure and high-temperature power plant service
Each grade offers different mechanical and chemical properties, making it suitable for specific operating conditions.
3. What is the difference between ASTM A335 and ASTM A106?
- ASTM A335: Alloy steel (Cr-Mo) seamless pipes for high-temperature service.
- ASTM A106: Carbon steel seamless pipes for moderate temperature applications.
In short, A335 offers superior strength, creep resistance, and heat stability, making it ideal for boiler tubes and steam lines.
4. What is the chemical composition of ASTM A335 Alloy Steel Pipe?
Typical alloying elements include:
- Chromium (Cr): 0.50% – 9.50%
- Molybdenum (Mo): 0.44% – 1.05%
- Carbon (C): 0.05% – 0.15%
- Manganese (Mn), Silicon (Si), and Nickel (Ni) in smaller amounts.
This composition improves tensile strength, corrosion resistance, and high-temperature stability.
5. Where are ASTM A335 Alloy Steel Pipes used?
Various industries rely on these pipes for applications that demand high strength at elevated temperatures, including:
- Power generation plants (superheater & reheater lines)
- Oil & gas refineries
- Petrochemical and fertilizer plants
- Boilers and heat exchangers
- Steam piping and pressure vessels
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