Inconel Products
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Stellar Alloys Steel Pipes and Tubes is a reputable manufacturer, supplier and exporter of high-quality Inconel pipes and tubes and Inconel plate and sheet that are intended to be used when subjected to extreme service conditions. Inconel is a nickel-chromium-based superalloy which possesses good corrosion, oxidation, and high heat resistance. Applications of our products are common in the aerospace and oil and gas industries, power generation, chemical processing, marine and heavy engineering. The Inconel pipes and tubes are produced under stringent quality control, which comprises metallurgical examination and dimensional measurement to make sure that the strength, the endurance, and the long-term performance in high-pressure and corrosive conditions remain consistent.
Table of Contents
- Introduction to Inconel Products
- Inconel Grades Overview
- Standard Specifications of Inconel
- Chemical Composition Comparison of Inconel
- Mechanical Properties of Inconel Products
- Physical Properties of Inconel Alloys
- Inconel Equivalent Grades
- Inconel Melting Point
- Key Applications by Industry
- Heat Treatment Processes
- Why Choose Stellar Alloys Steel Pipes and Tubes for Inconel Products?
- Quality Assurance & Testing
- Stock Availability
- Frequently Asked Questions
Inconel Grades We Supply
Inconel Flanges & Fittings
Complete range of forged fittings, flanges, and pipe fittings.
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Inconel Products Manufacturer in India, Inconel Nickel Alloy Stockist
The Inconel is a high-performance family of nickel-chromium superalloys, which is aimed at providing outstanding strength and stability at high temperatures and at extreme corrosion conditions. These alloys have excellent resistance to oxidation, carburisation, pitting corrosion, crevice corrosion, and stress corrosion cracking and thus are preferred in important industrial applications where failure is never an option.
Stellar Alloys steel pipes and tubes is a known manufacturer and supplier of Inconel in India, which supplies a full profile of inconel pipes & tubes, Inconel plates & sheets, and fittings, and bars in round, square, hex, and flat profiles. Our popular Inconel grades include Inconel 600, 601, 625, 718, 800, 825 and X-750 that serve various operating environments with the different industries. All materials are manufactured as per ASTM, ASME, UNS, EN, and DIN, and thus they get accepted internationally.
All products made by Stellar Alloys steel Pipes and Tubes under the brand Inconel are thoroughly tested to ensure that they have good mechanical strength, corrosion, thermal and dimensional stability, as well as quality. We also have an experienced technical team that helps customers to choose the best Inconel grade with maximum temperature, pressure, and exposure conditions to guarantee long-term performance, safety, and operating efficiency.
Inconel Pipes & Tubes
Our Inconel pipes and tubes are available in both seamless and welded configurations, suitable for heat exchangers, condensers, and process piping.
| Specification | Details |
| Size Range | Seamless: 15 NB to 600 NB Tubes: 1mm OD to 254mm OD |
| Schedules | SCH 5S, 10S, 40S, 80S, 160, XXS |
| Standards | ASTM B167, ASME SB167, B407, B444, B423, B829 |
| Types | Seamless, Welded, ERW, EFW, CDW |
| Key Grades | Inconel 600, Inconel 625, Inconel 718, Incoloy 800/800H, Incoloy 825 |
Inconel Plates & Sheets
We stock a wide range of Inconel plates, sheets, and coils for fabrication of pressure vessels, tanks, and structural components.
| Specification | Details |
|
Thickness |
0.5mm to 100mm |
|
Width |
1000mm, 1219mm, 1500mm, 2000mm, 2500mm |
|
Length |
2000mm, 2440mm, 3000mm, 6000mm (Custom cut available) |
|
Finish |
2B, BA, No.4, Hairline, Mirror, Hot Rolled (HR) |
|
Standards |
ASTM B168, B162, B409, ASME SB168 |
|
Key Grades |
Inconel 600, Inconel 625, Inconel 718 |
Inconel Flanges & Fittings
High-pressure flanges and pipe fittings manufactured to precise tolerances for leak-free connections.
| Specification | Details |
|
Types |
Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint |
|
Standards |
ASME B16.5, B16.47, B16.9, B16.11 |
|
Pressure Class |
150#, 300#, 600#, 900#, 1500#, 2500# |
|
Fittings |
Elbows, Tees, Reducers, Caps, Stub Ends, Unions |
Inconel Grades Overview
Grade | UNS No. | Key Features | Temp Range | Primary Applications |
N06600 | Excellent oxidation resistance, immune to chloride stress cracking. | Up to 2000°F | Chemical processing, heat treating, furnace components. | |
Inconel 601 | N06601 | Added aluminum for outstanding high-temp oxidation resistance. | Up to 2200°F | Thermal processing, petrochemical furnaces. |
N06625 | High strength, excellent fabricability, outstanding corrosion resistance. | Cryogenic to 1800°F | Marine, aerospace, pollution control, nuclear. | |
N07718 | Age-hardenable, extremely high strength, good weldability. | -423°F to 1300°F | Gas turbine engines, rocket motors, fasteners. | |
Incoloy 800/H | N08800/10 | Resists high-temp corrosion, oxidation, and carburization. | Up to 1500°F | Petrochemical, power generation, sheathing. |
N08825 | Superior resistance to sulfuric and phosphoric acids. | Up to 1000°F | Chemical processing, acid production, pickling. |
Standard Specifications of Inconel
These Inconel standard specifications list the relevant ASTM and ASME standards for different product forms, ensuring quality, reliability, and compliance with international industry requirements.
Product Form | ASTM Standards | ASME Standards |
Pipes & Tubes | ASTM B167, B407, B444, B423, B829, B705 | ASME SB167, SB407, SB444, SB423, SB829 |
Plates & Sheets | ASTM B168, B409, B424, B906 | ASME SB168, SB409, SB424 |
Bars & Rods | ASTM B166, B408, B425, B637 | ASME SB166, SB408, SB425 |
Fittings | ASTM B366 | ASME SB366 |
Forgings | ASTM B564 | ASME SB564 |
Chemical Composition Comparison of Inconel
This table compares the chemical composition of commonly used Inconel grades, showing the percentage range of key alloying elements. It helps in understanding material differences and selecting the right grade based on strength, corrosion resistance, and high-temperature performance requirements.
Grade | Ni | Cr | Fe | Mo | Nb | Cu | Al | Ti |
600 | 72.0 min | 14.0-17.0 | 6.0-10.0 | – | – | 0.5 max | – | – |
625 | 58.0 min | 20.0-23.0 | 5.0 max | 8.0-10.0 | 3.15-4.15 | – | 0.4 max | 0.4 max |
718 | 50.0-55.0 | 17.0-21.0 | Balance | 2.8-3.3 | 4.75-5.5 | 0.3 max | 0.2-0.8 | 0.65-1.15 |
800 | 30.0-35.0 | 19.0-23.0 | 39.5 min | – | – | 0.75 max | 0.15-0.60 | 0.15-0.60 |
825 | 38.0-46.0 | 19.5-23.5 | 22.0 min | 2.5-3.5 | – | 1.5-3.0 | 0.2 max | 0.6-1.2 |
Mechanical Properties of Inconel Products
This table highlights the typical mechanical properties of Inconel grades at room temperature, including tensile strength, yield strength, elongation, and hardness. It helps compare material strength and durability for selecting the right grade for demanding applications.
Grade | Tensile Strength (min) | Yield Strength (min) | Elongation (%) | Hardness (Max) |
600 | 550 MPa (80 ksi) | 240 MPa (35 ksi) | 30% | 88 HRB |
625 | 827 MPa (120 ksi) | 414 MPa (60 ksi) | 30% | 25 HRC |
718 (Aged) | 1275 MPa (185 ksi) | 1034 MPa (150 ksi) | 12% | 36 HRC |
800 | 520 MPa (75 ksi) | 205 MPa (30 ksi) | 30% | 192 HB |
825 | 586 MPa (85 ksi) | 241 MPa (35 ksi) | 30% | 200 HB |
Physical Properties of Inconel Alloys
The physical properties of Inconel alloys play a vital role in their performance under high temperatures, mechanical loads, and corrosive conditions. Factors such as density, melting range, thermal conductivity, and elastic modulus make these materials highly reliable for critical industrial applications.
Property | Inconel 600 | Inconel 625 | Inconel 718 | Inconel 825 |
Density (g/cm³) | 8.47 | 8.44 | 8.19 | 8.25 |
Melting Point (°C) | 1350–1410 | 1290–1350 | 1260–1336 | 1350–1400 |
Thermal Conductivity (W/m·K) | 11 | 9.8 | 11.2 | 11 |
Specific Heat (J/g·K) | 0.435 | 0.42 | 0.435 | 0.43 |
Modulus of Elasticity (GPa) | 207 | 207 | 205 | 200 |
Inconel Equivalent Grades
Knowing the equivalent grades of Inconel is important for international sourcing, design compatibility, and standard compliance. This table provides a clear comparison of Inconel 600, 625, 718, and 825 with their corresponding UNS, ASTM, Werkstoff, JIS, BS, and EN designations used across global markets.
Standard | Inconel 600 | Inconel 625 | Inconel 718 | Inconel 825 |
UNS | N06600 | N06625 | N07718 | N08825 |
ASTM | B163, B164, B167 | B443, B446, B447 | B637, B637M | B423, B424 |
Werkstoff (Germany) | 2.4816 | 2.4856 | 2.4668 | 2.4858 |
JIS (Japan) | SUH660 | SUS6625 | SUS6718 | SUS8825 |
BS (UK) | N06600 | N06625 | N07718 | N08825 |
EN | NiCr20Fe | NiCr22Mo9Nb | NiCr19Fe19NbMo | NiCr22Fe |
Inconel Melting Point
The melting point of Inconel alloys plays a key role in applications operating under extreme heat and thermal cycling. These alloys maintain structural stability, low thermal expansion, and reliable performance at elevated temperatures, making them suitable for high-temperature industrial environments.
Property | Inconel 600 | Inconel 625 | Inconel 718 | Inconel 825 |
Melting Point (°C) | 1350–1413 | 1290–1350 | 1260–1336 | 1370–1400 |
Melting Point (°F) | 2462–2575 | 2354–2462 | 2300–2436 | 2498–2552 |
Thermal Conductivity (W/m·K) | 11 | 9.8 | 11 | 11.6 |
Specific Heat Capacity (J/g·K) | 0.44 | 0.42 | 0.42 | 0.42 |
Density (g/cm³) | 8.47 | 8.44 | 8.19 | 8.17 |
Coefficient of Thermal Expansion (µm/m·°C) | 13.3 | 13.0 | 13.0 | 12.5 |
Inconel Machinability
Inconel alloys are known for their high strength and tendency to work-harden, which makes machining more challenging than conventional materials. Machinability varies by grade, affecting cutting tools, speeds, lubrication needs, and achievable surface finish.
Property | Inconel 600 | Inconel 625 | Inconel 718 | Inconel 825 |
Machinability Rating | Moderate | Moderate | Difficult | Moderate |
Work Hardening Tendency | High | Moderate | High | Moderate |
Preferred Cutting Tools | Carbide, HSS | Carbide, HSS | Carbide | Carbide, HSS |
Recommended Lubrication | Yes | Yes | Yes | Yes |
Surface Finish Quality | Good | Good | Moderate | Good |
Key Applications by Industry
- Aerospace & Aviation :Â Jet engine exhaust systems, turbine blades, afterburners, and engine thrust reversers utilize Inconel 718 and 625 for their high creep-rupture strength at extreme temperatures.
- Chemical Processing :Â Reactors, heat exchangers, evaporators, and transfer piping handling alkalies, fatty acids, and chlorides. Inconel 600 and Incoloy 825 are standard materials.
- Oil & Gas :Â Downhole tubing, wellhead components, and subsea pipelines in sour gas (H2S) environments. Inconel 625 and 718 provide necessary corrosion resistance and strength.
- Power Generation :Â Nuclear reactor components, steam generator tubing, ash handling systems, and superheater tubing in waste-to-energy boilers utilize Incoloy 800H/HT.
- Marine Engineering :Â Propeller shafts, submarine auxiliary propulsion motors, and exhaust systems exposed to seawater. Inconel 625 offers virtual immunity to chloride pitting.
- Thermal Processing :Â Furnace muffles, retorts, radiant tubes, and heat treating baskets. Inconel 600 and 601 resist oxidation and carburization at red-heat temperatures.
Heat Treatment Processes
Proper heat treatment is critical to achieving the desired properties in Inconel alloys.
- Solution Annealing: Typically performed between 925°C and 980°C (1700°F – 1800°F) followed by rapid cooling to dissolve carbides and maximize corrosion resistance.
- Precipitation Hardening (Age Hardening): Used for grades like Inconel 718. Involves heating to ~720°C, holding, furnace cooling to ~620°C, and holding again to form strengthening precipitates.
- Stress Relieving: Performed after cold working or welding to reduce residual stresses and prevent distortion or stress corrosion cracking.
Why Choose Stellar Alloys Steel Pipes and Tubes for Inconel Products?
Stellar Alloys Steel Pipes and Tubes is a trusted partner for critical superalloy requirements.
- Comprehensive Inventory: Extensive stock of pipes, plates, and bars in all major Inconel grades.
- Certified Quality: All materials come with Mill Test Certificates (EN 10204 3.1) and adhere to ASTM/ASME standards.
- Global Logistics: Fast shipping and export packaging to over 40 countries worldwide.
- Technical Expertise: Our metallurgists provide guidance on grade selection and fabrication.
- Custom Solutions: In-house cutting, beveling, and fabrication services to meet specific project needs.
Quality Assurance & Testing
We perform rigorous testing to ensure material integrity:
- Positive Material Identification (PMI)
- Ultrasonic Testing (UT)
- Hydrostatic Testing
- Intergranular Corrosion Testing
- Tensile & Hardness Testing
- Radiography (RT) for welds
- Impact Testing (Charpy V-Notch)
- Microstructure Analysis
Stock Availability
We maintain ready stock of common sizes for immediate dispatch:
- Inconel 600Â Pipes, Sheets, Bars
- Inconel 625Â Seamless Pipes, Plates
- Inconel 718Â Round Bars, Sheets
- Incoloy 800H/HTÂ Heater Tubes, Plates
- Incoloy 825Â Pipes, Fittings
Other Material Products
Frequently Asked Questions
Inconel is primarily composed of Nickel (usually 50%+) and Chromium (15-25%), with additions of Iron, Molybdenum, Niobium, and Cobalt depending on the specific grade. This composition provides its superalloy properties.
Inconel 600 is a solid-solution alloy used for general corrosion and heat resistance. Inconel 625 contains added molybdenum and niobium, providing significantly higher strength and better resistance to pitting and crevice corrosion, especially in seawater.
Yes, but it requires specific procedures. Inconel can be prone to cracking during welding. Gas Tungsten Arc Welding (GTAW/TIG) is commonly used with matching filler metals like Inconel 625 or 82 (ERNiCrMo-3 or ERNiCr-3).
It depends on the grade. Inconel 600 and 601 withstand oxidation up to 2000-2200°F (1093-1200°C). Inconel 718 retains high strength up to 1300°F (700°C).
Both are high-performance nickel alloys. Inconel is generally superior for high-temperature oxidation resistance, while Hastelloy (especially C-276) is often preferred for severe chemical corrosion resistance in reducing acids.
Inconel alloys are predominantly nickel-based (>50% Ni), while Incoloy alloys have a lower nickel content (<50% Ni) and higher iron content, making them more cost-effective for certain applications while still offering excellent performance.
Most Inconel grades are non-magnetic at room temperature. This property is beneficial for applications requiring materials that do not interfere with magnetic fields.
The high cost is due to the high content of expensive alloying elements like Nickel and Molybdenum, complex manufacturing processes (vacuum induction melting), and difficulty in machining/forming compared to steel.