Inconel 825 Pipe
Steel Pipe & Tubes has been a leading supplier of Inconel alloy piping solutions.
Inconel 825 Pipe is a nickel-iron-chromium alloy with added molybdenum, copper and titanium, specifically engineered to resist some of the harshest chemical environments in industry. It offers excellent resistance to sulfuric and phosphoric acids, stress-corrosion cracking, and oxidizing as well as reducing conditions. Unlike conventional stainless steels, which often fail when exposed to aggressive acids, Inconel 825 retains both its structural integrity and corrosion resistance over prolonged service periods, making it a dependable choice for critical applications.
This alloy also provides exceptional mechanical strength at elevated temperatures, along with good impact toughness at cryogenic levels. Inconel 825 Pipes and Tubes are widely trusted in chemical processing plants, offshore oil & gas installations, marine equipment, and pollution-control units, where uninterrupted performance, safety and efficiency are vital.
Reliable Inconel 825 Alloy Pipes Manufacturer in India | UNS N08825 / WERKSTOFF 2.4858 Certified Supplier
Stellar Alloys is a trusted leader in the global piping industry with over two decades of expertise in supplying premium nickel alloy pipes and tubes to demanding sectors worldwide. As a recognized manufacturer and exporter, we specialize in Inconel 825 Pipe and Tube including Seamless Pipe, Welded Pipe, Seamless Tube and Welded Tube serving industries such as chemical processing, oil & gas, marine engineering, pollution control and nuclear power.
With a strong export presence across multiple continents, Stellar Alloys has established itself as the preferred partner for clients who prioritize reliability, timely delivery, and internationally certified quality. Our ISO and PED-approved manufacturing facilities adhere to stringent global standards, ensuring every pipe and tube is tested, certified, and ready for critical service. A robust supply chain system enables us to fulfill both large-scale requirements and specialized project-based orders with efficiency.
By integrating advanced manufacturing expertise, rigorous quality testing, and global logistics support, Stellar Alloys delivers not only high-performance Inconel 825 products but also the assurance of a dependable, long-term supplier that industries can trust for operational excellence.
What Are Inconel 825 Pipe / Tubes?
Inconel 825 Pipes and Tubes are produced in both seamless and welded forms to address a wide variety of industrial requirements. Seamless Inconel 825 Pipes and Tubes are the preferred choice for critical and high-pressure applications due to their joint-free structure, uniform strength, and leak-proof performance. They are extensively used in heat exchangers, condensers, pressure vessels, and piping systems handling aggressive acids, where reliability and safety are essential. Welded Inconel 825 Pipes and Tubes, on the other hand, are more cost-effective for larger diameters where seamless production is not practical. These welded variants are commonly used in chemical process piping, marine exhaust systems, and large-scale industrial installations, providing dependable performance while optimizing overall project costs.
The alloy, designated as Inconel 825 (UNS N08825 / WNR 2.4858), is stabilized with titanium and contains a balanced composition of nickel, iron, chromium, copper, and molybdenum. This unique chemistry makes it highly resistant to both oxidizing and reducing environments, as well as sulfuric and phosphoric acids. It is particularly effective against chloride-induced stress corrosion cracking, making it suitable for seawater and offshore applications.
These advanced properties make Inconel 825 Pipes and Tubes an indispensable material for industries such as chemical processing, oil & gas, pollution control, marine engineering, and nuclear fuel reprocessing. By combining exceptional corrosion resistance with mechanical strength and thermal stability, they deliver long-term, uninterrupted performance in some of the most aggressive environments. This resilience and versatility have established Inconel 825 as a trusted choice for engineers and project managers worldwide.
Types of Inconel Alloy 825 Pipes
Inconel Alloy 825 is available in several forms to suit diverse industrial applications. From seamless and welded options to customized tubes for high-performance systems, each product offers a balance of corrosion resistance, strength and cost efficiency. Here are the types of Inconel 825 Pipe available with us:
Incoloy 825 Pipe
UNS N08825 Welded Pipe
Alloy 825 Seamless Pipe
Inconel 825 Pipe Specifications
Our Inconel 825 Pipes and Tubes are manufactured in line with strict international standards to ensure reliability in critical industries. Each specification is carefully designed to deliver superior corrosion resistance, mechanical strength, and long service life, making them ideal for applications in chemical processing, marine, and high-temperature environments.
| Parameter | Details |
| Standards | ASTM B423 / ASME SB423 |
| Grade | Inconel 825 (UNS N08825, WNR 2.4858) |
| Forms | Seamless Pipe, Welded Pipe, Seamless Tube, Welded Tube |
| End Finish | Plain End, Beveled End, Threaded |
| Surface Finish | Pickled, Bright Annealed, Polished |
Available Size Range of Inconel 825 Pipe
Stellar Alloys supplies Inconel 825 Pipes and Tubes in a wide range of dimensions to meet diverse project requirements. The table below outlines the commonly available outside diameters, wall thicknesses, schedules, and approximate weight per meter, helping engineers and buyers select the right fit for their applications.
| Outside Diameter (OD) mm | Wall Thickness (WT) mm | Nominal Pipe Size (in.) | Schedule (Sch) | Weight (Kg/m) |
| 13.72 | 1.65 | 1/4 | 10S | 0.50 |
| 21.34 | 2.77 | 1/2 | 40S | 1.29 |
| 33.40 | 3.38 | 1 | 40S | 2.54 |
| 60.33 | 5.54 | 2 | 80S | 7.60 |
| 114.30 | 6.02 | 4 | 40S | 16.32 |
| 168.28 | 10.97 | 6 | 80S | 43.21 |
| 219.08 | 12.70 | 8 | 80S | 65.63 |
ASTM B425 UNS N08825 Pipe Dimensions & Thickness Chart
The dimensions and wall thickness of Inconel 825 Pipes are standardized under ASTM B425 to guarantee uniformity, consistency, and reliable performance across diverse industrial applications. These specifications ensure compatibility in fabrication, installation, and long-term service. The table below highlights common nominal pipe sizes (NPS), outside diameters, and wall thicknesses for frequently used schedules.
| NPS (Nominal Pipe Size) | Outside Diameter (mm) | Wall Thickness (mm) | Schedule |
| ½” | 21.34 | 2.77 | SCH 40 |
| 1” | 33.40 | 3.38 | SCH 40 |
| 2” | 60.33 | 5.54 | SCH 40 |
| 4” | 114.30 | 6.02 | SCH 40 |
| 6” | 168.27 | 7.11 | SCH 40 |
Pressure Ratings of Inconel 825 Pipe
The pressure ratings of Inconel 825 Pipes and Tubes are essential in evaluating their suitability for high-pressure and corrosive service environments. This nickel-iron-chromium alloy, enriched with molybdenum, copper, and titanium, is specifically designed to resist both oxidizing and reducing media, while maintaining strength and reliability in aggressive chemical conditions. Its proven ability to perform under stress makes it a trusted material in industries where conventional stainless steels quickly deteriorate.
Key Performance Highlights
Outstanding Corrosion & Pressure Resistance: Inconel 825 pipes maintain their mechanical strength even when exposed to highly aggressive environments such as sulfuric, phosphoric, and nitric acids. This resistance prevents premature degradation, ensuring safe and continuous operation in chemical plants, marine applications, and pollution-control units.
Retains Strength at Elevated Temperatures: Unlike carbon steels that lose integrity under prolonged heat exposure, Inconel 825 withstands internal pressures at temperatures exceeding 540°C. Its ability to retain structural stability minimizes risks of rupture, leaks, or distortion during extended high-temperature service.
Extensively Used in High-Pressure Systems: With excellent creep resistance and toughness, Inconel 825 pipes are widely used in reactors, heat exchangers, seawater piping, and nuclear fuel reprocessing units. Their durability under pressure extends operational life, reduces downtime, and minimizes costly maintenance cycles.
Indicative Pressure Ratings (38 °C / 100 °F)
| Size × WT (mm) | Seamless Pipe (bar) | Welded Pipe (bar) |
| 25 × 2.0 | 340 | 290 |
| 40 × 2.5 | 255 | 215 |
| 50 × 3.0 | 240 | 205 |
| 50 × 5.0 | 450 | 380 |
| 75 × 3.0 | 155 | 130 |
| 100 × 5.0 | 200 | 170 |
Weight Chart of WERKSTOFF NR. 2.4858 Rectangular Pipes
The weight of Inconel 825 rectangular pipes (Werkstoff Nr. 2.4858) depends on their dimensions and wall thickness. Accurate weight calculations are critical for engineers and procurement teams to estimate material requirements, optimize design, and manage project costs. The chart below provides indicative weight per meter values for commonly supplied rectangular sizes.
| Size (mm) | Thickness (mm) | Weight (kg/m) |
| 50 x 25 | 3.0 | 3.3 |
| 75 x 50 | 4.0 | 6.9 |
| 100 x 50 | 5.0 | 10.4 |
HSN Code of Inconel 825 Seamless Pipe
The HSN (Harmonized System of Nomenclature) Code is an internationally recognized system for classifying goods in global trade. For Inconel 825 Seamless Pipes, the HSN code simplifies customs documentation, GST compliance, and international trade procedures, ensuring smooth transactions for buyers and exporters.
ASME SB425 Inconel 825 Pipe HS Code
The following HS Code classifications apply to Inconel 825 Pipes and Tubes manufactured as per ASTM/ASME SB425 specifications. These codes are widely referenced in import-export paperwork, taxation systems, and customs clearance processes.
| HS Code | Description |
| 73044900 | Hot Rolled Inconel 825 Pipe as per ASME/ASTM SB425 |
| 73044100 | Cold Finished Inconel 825 Pipe as per ASME/ASTM SB425 |
| 75051220 | Nickel Alloy Seamless Pipes & Tubes including Inconel 825 grade |
| 73042900 | Welded Inconel Alloy 825 Pipes & Tubes, corrosion and heat resistant |
| 73044900 | Inconel 825 Hot Rolled Pipe for high-temperature and chemical service |
Manufacturing Process of Alloy 825 Pipe
The production of Inconel 825 Pipes and Tubes at Stellar Alloys is carried out under strict international quality protocols to ensure maximum durability, precision, and performance. Every stage of manufacturing is closely monitored to deliver seamless and welded products that comply with ASTM/ASME SB425 standards and meet the demands of critical industries.
Selection of Premium Nickel-Iron-Chromium-Molybdenum Billets: Only certified billets containing the correct balance of nickel, iron, chromium, molybdenum, copper, and titanium are selected. This precise composition guarantees superior corrosion resistance in both oxidizing and reducing environments, consistent mechanical strength, and metallurgical stability, making the pipes suitable for aggressive chemical service.
Hot Extrusion or Piercing for Seamless Pipe: Billets are heated and pierced to form hollow shells, which are then hot-extruded into seamless pipes. This eliminates weld seams, producing joint-free pipes with high dimensional accuracy and strength. Such seamless Inconel 825 Pipes are leak-proof and ideal for demanding applications like heat exchangers, chemical reactors, and marine service lines.
Advanced TIG/MIG Welding for Welded Pipe: For welded variants, high-precision TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas) welding techniques are employed to fuse alloy plates or coils. These methods create uniform, defect-free weld seams with strong metallurgical bonds. Welded Inconel 825 Pipes are particularly suited for larger diameters, offering cost-effective solutions for process piping, pollution-control equipment, and marine exhaust systems.
Cold Drawing and Pilgering for Tubes: Pipes and tubes undergo cold drawing and pilgering to refine thickness, diameter, and surface finish. This step ensures tight tolerance control, smooth internal surfaces for enhanced flow, and improved strength through controlled work hardening, making them reliable for instrumentation systems and high-efficiency condensers.
Solution Annealing & Pickling: Heat treatment through solution annealing restores ductility, corrosion resistance, and microstructural stability. The pickling process removes surface oxides and impurities, resulting in a clean, smooth finish. These treatments guarantee dimensional stability and longer service life, even in highly corrosive or acidic environments.
Non-Destructive Testing & Quality Assurance: Each Inconel 825 Pipe undergoes rigorous ultrasonic, radiographic, and hydrostatic testing to detect surface or internal defects. Additional mechanical and PMI (Positive Material Identification) tests confirm material accuracy and compliance with ASTM/ASME standards. This comprehensive testing framework ensures that every product delivered is structurally sound, dimensionally precise, and certified safe for critical applications.
Physical Properties of Incoloy 825 Pipe (Annealed Condition)
The physical properties of Incoloy 825 Pipes determine their reliability in corrosive chemical environments and moderate high-temperature conditions. When supplied in the annealed condition, these properties reflect the alloy’s superior corrosion resistance, stability, and durability, making it suitable for industries that require long-term performance in aggressive service environments.
| Property | Details |
| Density | 8.14 g/cm³ |
| Melting Range | 1370–1400 °C |
| Tensile Strength | 550 MPa (min) |
| Yield Strength (0.2% offset) | 220 MPa (min) |
| Elongation | 30% |
Temperature Range of UNS N08825 Welded Pipe
The temperature resistance of UNS N08825 Welded Pipes makes them a dependable choice for industries where continuous exposure to both heat and corrosive environments is unavoidable. These pipes retain mechanical stability, strength, and corrosion resistance even under demanding thermal conditions, ensuring safe and long-lasting performance.
Continuous Service up to 540°C (1000°F): Incoloy 825 welded pipes can withstand extended exposure to moderately high temperatures while resisting a wide range of corrosive acids. This makes them suitable for chemical plants, pollution-control units, and marine exhaust systems.
Resists Oxidation and Scaling: At elevated temperatures, the alloy develops a stable oxide layer that prevents scaling and surface degradation during thermal cycling, ensuring extended service life.
Superior Acid & Chloride Resistance: Thanks to its nickel, molybdenum, and copper content, Incoloy 825 maintains excellent resistance to sulfuric and phosphoric acids, as well as chloride-induced corrosion, even in heated environments.
Stable Mechanical Properties at Heat: The pipes retain tensile and yield strength even under prolonged high-temperature service. This ensures dimensional stability and reduces the risk of deformation or mechanical failure during continuous operation.
Stress Rupture Properties of Inconel 825 Pipe
The stress rupture performance of Inconel 825 Pipes makes them a reliable choice for industries operating in corrosive environments under moderate heat and pressure. While not designed for the extreme creep resistance of high-temperature grades like 800HT, Inconel 825 provides consistent durability in applications where both chemical resistance and mechanical stability are required over long service periods.
Resistance to Creep and Stress Rupture: Inconel 825 pipes retain structural integrity during prolonged exposure to stress in chemical and thermal environments. This prevents premature failure in systems handling high-pressure corrosive fluids.
Stable Microstructure in Service: The alloy maintains metallurgical stability under operational thermal cycles, resisting grain boundary weakening. This property makes it suitable for reactors, acid production equipment, and pollution-control scrubbers.
Reliable Long-Term Durability: Even when subjected to continuous stress in corrosive service, Inconel 825 maintains its mechanical properties. This reduces the frequency of replacements and ensures longer operational cycles.
Ideal for Chemical & Marine Environments: The combination of stress rupture resistance and outstanding corrosion protection makes these pipes effective in chemical processing plants, offshore piping systems, and nuclear fuel reprocessing units applications that demand dependable, decades-long performance.
Testing & Quality Standards for Nickel Alloy 825 Pipes
Every Incoloy 825 Pipe and Tube undergoes rigorous testing to ensure safety, reliability, and adherence to international quality standards. These checks guarantee that each product performs consistently in critical chemical, marine, and high-pressure applications.
100% PMI Testing (Positive Material Identification): Confirms the correct alloy grade and chemical composition. This prevents material mix-ups and ensures buyers receive pipes that meet the specified requirements.
Ultrasonic & Radiographic Testing: Non-destructive tests are carried out to detect internal defects, cracks, or porosity in both seamless and welded pipes. These inspections safeguard structural integrity without causing damage to the product.
Hydrostatic Test for Pressure Integrity: Pipes are tested under high-pressure water conditions to check for leakage or weaknesses. This ensures dependable performance in corrosive and high-pressure systems.
Tensile & Hardness Tests: Mechanical tests verify tensile strength, yield strength, elongation, and hardness. These parameters confirm that the alloy is fit for demanding service environments.
Certifications: EN 10204 3.1 / 3.2, ISO 9001, PED Approved: All Incoloy 825 Pipes and Tubes are supplied with globally recognized certifications, assuring clients of compliance with export norms, industry standards, and project specifications.
Specification Sheet of Inconel 825 Hex / Bush Pipes
Our Inconel 825 Pipes and Tubes are manufactured to meet stringent international standards, ensuring durability, precision, and corrosion resistance in aggressive service environments. The specification sheet below provides a quick reference for buyers covering technical standards, certifications, finishes, and global availability.
| Category | Details |
| ASTM Specification | ASTM B423, ASTM B424, ASTM B425, ASTM B464, ASTM B704, ASTM B705 |
| UNS Grades | N08825 |
| Werkstoff Nr. | 2.4858 |
| Standard | ASTM, ASME, AISI, EN, DIN, JIS, GB, NF, AMS |
| International Specifications | ISO 6207, BS 3074 NA16, VdTüV 432, DIN 17754 |
| Seamless Pipe Size | 4.0 mm to 219 mm, Wall Thickness: 0.5 mm to 20 mm |
| Welded / EFW Pipe Size | 5.0 mm to 1219.2 mm |
| Schedules Available | SCH 5, SCH 10, SCH 10S, SCH 20, SCH 30, SCH 40, SCH 40S, SCH 60, SCH 80, SCH 80S, SCH 120, SCH 140, SCH 160, XS, XXS, STD |
| Swg & Bwg | 10 Swg, 12 Swg, 14 Swg, 16 Swg, 18 Swg, 20 Swg |
| Surface Finish | BA (Bright Annealed), AP (Annealed & Pickled), Polished, No.1, 2B, No.4, HL, MF, Mirror, 8K Finish |
| Length | Single Random, Double Random, Cut Lengths |
| Pipe Forms | Round, Square, Rectangular, Hollow, Hydraulic, Coiled, Straight Pipes, “U” Shape, Pancake Coils |
| Pipe Ends | Plain End, Beveled End, Threaded / Screwed Ends |
| Pipe Types | Seamless, Welded, ERW, EFW, CEW, DOM, CDW, Fabricated |
| Applications | Chemical Processing Pipe, Oil & Gas Pipe, Marine Pipe, Pollution Control Pipe, Heat Exchanger & Condenser Pipe |
| Marking on Pipes | Grade, Standard, OD, Thickness, Heat No., Length (custom marking available) |
| Specialization | Large Diameter Inconel 825 Pipes |
| Value Added Services | Electro & Commercial Polish, Annealing & Pickling, Bending, Draw & Expansion, CNC Machining as per size & length |
| Manufacturing Techniques | Hot Drawn, Cold Drawn, Hot Extruded, Solution Annealed, Bright Annealed |
| Test Certificates | Manufacturer Test Certificate (MTC), Government Lab Certificate, Third-Party Inspection Reports |
| Quality Reports | Radiography Test Report, Heat Treatment Charts, PMI Reports, Raw Material Certificates |
| MTC Standards | EN 10204 / 3.1, EN 10204 / 3.1B, EN 10204 / 3.2 |
| HSN Code | 75051220 |
| Export Documents | Commercial Invoice, Form A (GSP – Generalized System of Preferences) |
| Major Manufacturers (Sourcing) | Kobe Steel (Japan), Nippon Steel (Japan), Sumitomo Metals (Japan), Sanyo Special Steel (Japan), Tubacex (Spain), Schoeller Bleckmann (Austria), Seah Steel (Korea) |
| Global Supply Locations | India (Mumbai, Delhi, Pune, Rajkot, Surat, Ahmedabad, Bangalore, Chennai, Coimbatore, Vadodara, Ludhiana, Kolkata, Hyderabad, Nagpur, Indore, Jamshedpur, Baroda, Noida, Ranchi, Howrah, Thiruvananthapuram, Ernakulam), UAE (Abu Dhabi, Dubai), Saudi Arabia (Riyadh, Dammam, Khobar), Iran (Ahvaz, Tehran), Qatar (Doha), Oman (Muscat), Bahrain (Manama), Kuwait, Turkey (Istanbul, Ankara), Europe (London, Courbevoie, Madrid, Vienna), North America (Montreal, Calgary, Mexico City), South America (Bogota, Caracas, Rio de Janeiro, Santiago), Asia-Pacific (Melbourne, Sydney, Perth, Gimhae-si, Seoul), Africa (Lagos) and more. |
Latest Price List of Alloy 825 Seamless Tubes (Per Kg)
Our Inconel 825 Pipes and Tubes are offered at competitive international prices. The table below provides indicative price ranges for seamless and welded variants, enabling engineers, procurement teams and project managers to plan cost estimations efficiently.
| Description | Price (INR) |
| Inconel 825 Seamless Alloy Steel Pipe | ₹1,75,000 – ₹3,50,000 / Ton |
| Inconel 825 Nickel Alloy Pipe (UNS N08825) | ₹29,50,000 – ₹50,00,000 / Ton |
| Inconel 825 Alloy Seamless Pipe | ₹95 / Kg |
| Inconel 825 Seamless Stainless Steel Pipe | ₹90,000 / Ton |
| DIN 2.4858 Inconel 825 Nickel Alloy Pipe (Sheathing & Nuclear Tubing) | ₹1,950 / Kg |
| Inconel 825 Seamless Pipe (FM60 Grade) | ₹35,000 – ₹85,000 / Ton |
| Inconel 825 Alloy Welded Pipe | ₹1,950 – ₹2,250 / Kg |
| Inconel 825 Heat-Resistant Alloy Pipe (WERKSTOFF 2.4858) | ₹6,00,000 / Ton |
| Inconel 825 Nickel Alloy Seamless Pipe | ₹4,30,000 / Ton |
Note: Prices are indicative and subject to change based on market conditions, material availability, order quantity and delivery location. Please contact us for the latest quote.
Why Choose Stellar Alloys for Inconel 825 Pipes & Tubes?
Choosing Stellar Alloys for your Inconel 825 Pipes and Tubes means partnering with a manufacturer that combines technical precision with global dependability. With over two decades of experience, we have established ourselves as a trusted supplier of Inconel 825 Pipes and Tubes across industries such as chemical processing, oil & gas, marine engineering, pollution control, and nuclear power. Our ISO and PED-certified facilities are equipped with state-of-the-art manufacturing and testing technologies, ensuring every seamless and welded product meets stringent international standards. Beyond product quality, we prioritize complete documentation, supplying mill test certificates, PMI reports, and export-ready compliance records with every order.
What sets Stellar Alloys apart is our ability to provide competitive pricing without compromising on quality or delivery timelines. With a strong export and logistics network, we serve clients worldwide with both small-scale project requirements and bulk industrial orders. Our customer-focused approach, supported by technical expertise and responsive after-sales service, has made us the preferred choice for global buyers seeking long-term reliability, superior performance, and consistent value in Inconel 825 piping solutions.
Frequently Asked Questions About Inconel 825 Pipe
Inconel 825 Pipes are primarily used in environments that involve aggressive chemical exposure. They are widely applied in chemical processing plants, pollution-control equipment, marine systems, and nuclear fuel reprocessing units. Their resistance to sulfuric, phosphoric, and nitric acids makes them ideal for handling corrosive fluids and gases under pressure.
While both are nickel-iron-chromium alloys, Inconel 825 contains added molybdenum, copper, and titanium, which significantly improve its resistance to reducing acids and chloride-induced stress corrosion cracking. Inconel 800, on the other hand, is designed mainly for high-temperature strength and oxidation resistance. In short, Inconel 825 excels in corrosive environments, whereas Inconel 800 is preferred for extreme heat resistance.
No. Inconel 825 is a non-magnetic alloy in its annealed condition. This property, along with its corrosion resistance, makes it suitable for use in sensitive applications such as instrumentation, marine systems, and chemical plants where non-magnetic materials are required.
Inconel 825 Pipes are commonly used in chemical processing, oil & gas, marine engineering, pollution control, and nuclear reprocessing industries. Their unique ability to resist both oxidizing and reducing acids makes them reliable in environments where stainless steels and other alloys cannot withstand long-term service.
Yes. Inconel 825 Pipes can be welded using standard welding techniques such as TIG and MIG. The alloy’s titanium stabilization prevents intergranular corrosion during welding, making it highly suitable for fabrications and repairs in corrosive environments.
