Inconel Pipe Fittings Supplier in India – 600, 601, 625 & 718 Elbows, Tees & Reducers
Home > Materials > Inconel Products > Inconel Pipe Fittings
A pipeline is as strong as its weakest fitting and in high temperature or corrosive service the weakest fitting is frequently an elbow or reducer of the wrong material. Inconel pipe fittings are there to fill that void and join, turn and reduce Inconel pipe without sacrificing its inherent strength or corrosion resistance. Aashish Metals provide Inconel 600, 601, 625 and 718 elbows, tees, reducers, caps, stub ends and crosses in different type, seamless or welded, buttweld or socket weld with a heat-traceable EN 10204 3.1 mill test certificate on every order. Whether it’s a few inconel fittings for a repair job or the entire set for a new job, we machine and finish to ASME B16.9, B16.11 and B16.28 dimensions and can fit 100% radiography and third party inspection. This page explains grades, standards, sizes, pressure classes, applications and price drivers in a simple language, so that our enquiry is completed for you and will be returned as an accurate, quick quote.
What are Inconel pipe fittings?
Inconel pipe fittings are elbows, tees, reducers, caps, stub ends and crosses made from Inconel nickel-chromium alloys such as 600, 601, 625 and 718. They connect and redirect Inconel piping in high-temperature, high-pressure or corrosive service, and are supplied to ASTM B366 / ASME SB366 in buttweld, socket weld and threaded types.
Inconel Pipe Fittings Material Grades
Inconel 625 pipe fittings (UNS N06625)
Alloy 625 is solid-solution strengthened by molybdenum and niobium, which makes it tough, weldable and highly resistant to pitting, crevice attack and chloride stress-corrosion cracking. Inconel 625 pipe fittings and alloy 625 fittings are the usual choice for seawater, offshore, flue-gas and chemical process lines, and it is the most searched grade in this family.
Inconel 600 pipe fittings (UNS N06600)
Alloy 600 resists oxidation to very high temperatures and is immune to chloride stress-corrosion cracking, which is why inconel 600 fittings and inconel 600 pipe fittings turn up in furnaces, heat-treatment lines, nuclear equipment and chemical plants. It is a solid-solution alloy with moderate strength.
Inconel 601 pipe fittings (UNS N06601)
The added aluminium in alloy 601 gives outstanding scale resistance to about 1,150 °C, so inconel 601 pipe fittings are specified for furnace ducting, radiant tube fittings and high-temperature process lines. We supply 601 fittings as socket weld and threaded types; larger buttweld sizes are made to order [confirm lead time].
Inconel 718 pipe fittings (UNS N07718)
718 is precipitation-hardened for high strength, and while it is less common as a standard pipe fitting than 625, we can supply 718 buttweld and forged fittings to drawing for turbine, aerospace and high-pressure service. Condition (solution-treated or aged) should always be specified
A note on Incoloy 825 and 800 pipe fittings
“Incoloy 825 pipe fittings” is technically a different alloy family (iron-nickel-chromium, UNS N08825) rather than Inconel, but it is commonly sold and searched for alongside Inconel fittings because the applications overlap. We stock both: see Incoloy 825 pipe fittings and Incoloy 800/800H/800HT pipe fittings.
| Property / use | 600 | 601 | 625 | 718 |
|---|---|---|---|---|
| UNS | N06600 | N06601 | N06625 | N07718 |
| Werkstoff (W.Nr.) | 2.4816 | 2.4851 | 2.4856 | 2.4668 |
| Best for | Oxidation, caustic, chloride SCC | Extreme oxidation and scaling to about 1,150 °C | Seawater, chlorides, weldability | Highest strength, turbines, aerospace |
| Avoid when | High strength needed | High strength needed | Highest strength is the priority | Welding after ageing |
| Fitting standard | ASTM B366 (WPNCI) | ASTM B366 (WPNC601) | ASTM B366 (WPNiCrMo) | ASTM B366, to drawing |
| Typical density | 8.47 g/cm³ (not 8.8 as one competitor states for all grades) | 8.11 g/cm³ | 8.44 g/cm³ | 8.19 g/cm³ |
Engineer’s quick rule
Corrosion, chlorides and weldability: 625. Extreme heat and scaling in furnace ducting: 601, then 600. Highest strength for turbines or aerospace: 718, made to drawing. Acid service outside the Inconel family: ask about Incoloy 825 or 800. Send us your media, temperature and pressure and we will help you choose.
Technical data
Inconel Pipe Fittings We Supply
Inconel fittings and inconel pipe fittings cover a wide family of shapes. Here is what we stock and make to order.
| Fitting type | Common shapes | Typical connection |
|---|---|---|
| Buttweld fittings | Elbows (90°, 45°, 180°, long and short radius), tees (equal and reducing), reducers (concentric and eccentric), caps, stub ends, crosses, reducing crosses, pipe bends | Buttweld, seamless or welded, 1/2" to 48" |
| Forged fittings | 90° and 45° elbows, street elbows, tees, crosses, couplings, unions, reducers, caps, plugs, inserts | Socket weld or threaded, 1/8" to 4", 2000–9000 lb classes |
| Instrumentation fittings | Compression and tube fittings for small-bore lines | Compression, or as specified |
| Special fittings | Piggable bends, forged/plate cut rings, forged/plate circles, custom shapes | To drawing |
Looking for one grade? Go to our pages for Inconel 625 pipe fittings, Inconel 600 pipe fittings, or the 601 socket weld and threaded pages, or browse the full Inconel products range. Working with the pipe itself? See Inconel pipes and tubes.
Inconel Pipe Fittings Chemical Composition
| Element (%) | 600 | 601 | 625 | 718 |
|---|---|---|---|---|
| Nickel | 72.0 min | 58.0 – 63.0 | 58.0 min | 50.0 – 55.0 |
| Chromium | 14.0 – 17.0 | 21.0 – 25.0 | 20.0 – 23.0 | 17.0 – 21.0 |
| Iron | 6.0 – 10.0 | Balance | 5.0 max | Balance |
| Molybdenum | – | – | 8.0 – 10.0 | 2.8 – 3.3 |
| Niobium (+Ta) | – | – | 3.15 – 4.15 | 4.75 – 5.50 |
| Aluminium | – | 1.0 – 1.7 | 0.40 max | 0.20 – 0.80 |
| Carbon | 0.15 max | 0.10 max | 0.10 max | 0.08 max |
Inconel Pipe Fittings Mechanical Properties
| Typical property | 600 | 601 | 625 | 718 (aged) |
|---|---|---|---|---|
| Density | 8.47 g/cm³ | 8.11 g/cm³ | 8.44 g/cm³ | 8.19 g/cm³ |
| Tensile strength (min.) | 550 MPa (80 ksi) | 550 MPa (80 ksi) | 690 – 827 MPa (100–120 ksi) | 1240 MPa (180 ksi) |
| Yield, 0.2% (min.) | 240 MPa (35 ksi) | 205 MPa (30 ksi) | 276 – 414 MPa (40–60 ksi) | 1030 MPa (150 ksi) |
| Elongation (min.) | 30% | 30% | 30% | 12% |
| Approx. max. service temp. | About 1090 °C | About 1150 °C | About 980 °C | About 700 °C (strength-limited) |
These are typical minimums for wrought fitting material; the fitting itself is forged or formed and then annealed (or aged, for 718), so actual test results are on the MTC. Use the certified values for design, not the datasheet.
Inconel Pipe Fittings Specification and Dimensions
| Parameter | Details |
|---|---|
| Grades | Inconel 600, 601, 625, 718; Incoloy 800/800H/800HT and 825 on request |
| Standard | ASTM B366 / ASME SB366 (wrought nickel alloy fittings) |
| Dimensional standards | ASME B16.9 (buttweld fittings), ASME B16.11 (forged socket weld and threaded fittings), ASME B16.28 (short radius elbows and returns), MSS-SP-43 (small-diameter buttweld fittings) |
| Type | Seamless or welded buttweld; forged socket weld and threaded; fabricated on request |
| Size range | Buttweld 1/2" to 48"; forged socket weld and threaded 1/8" to 4" |
| Wall thickness / schedule | SCH 5S, 10S, 40S, 80S, 160, XXS, or to match your pipe wall |
| Pressure classes (forged) | 2000, 3000, 6000 and 9000 lb |
| Bending radius (elbows/bends) | 1D, 1.5D, 2D, 3D, 5D, 6D, 8D, 10D or custom |
| End finish | Bevelled end (ASME B16.25), plain end, threaded |
| Certificates | EN 10204 3.1 MTC; 3.2 with third-party inspection; NACE MR0175 / MR0103 compliance on request |
| Testing | PMI, hydrostatic, radiography (up to 100% on request), IGC, ultrasonic, dye penetrant |
| Packing | Boxed or crated, capped ends, export wooden cases |
Example Dimensions: Long-Radius 90° Buttweld Elbow (ASME B16.9)
| NPS | OD (mm) | Center-to-end, LR 90° (mm) |
|---|---|---|
| 1/2" | 21.3 | 38 |
| 1" | 33.4 | 38 |
| 2" | 60.3 | 76 |
| 3" | 88.9 | 114 |
| 4" | 114.3 | 152 |
| 6" | 168.3 | 229 |
| 8" | 219.1 | 305 |
| 10" | 273.1 | 381 |
Centre-to-end for a long-radius elbow is 1.5 × NPS (in inches, converted to mm). Short-radius elbows use 1.0 × NPS. Use this to check fit-up before ordering, and always confirm against the current edition of ASME B16.9 for your exact size and schedule.
Inconel vs Other Alloy Pipe Fittings
| Fitting material | Strong at | Weak at | Relative cost |
|---|---|---|---|
| Inconel 600 / 601 / 625 / 718 | High-temperature strength, oxidation and chloride resistance | Higher cost than stainless steel | $$$ |
| Hastelloy C276 / C22 | Hot acids, wet chlorine, broad chemical resistance | Highest cost | $$$$ |
| Monel 400 | Hydrofluoric acid, seawater, alkalis | Oxidising acids; lower temperature limit | $$$ |
| Incoloy 825 / 800 series | Acid service (825), carburising and creep (800H/HT) | Lower strength than 718 | $$ |
| Stainless steel 316L / 904L | Moderate corrosion, lower cost | Chlorides, high temperature | $ – $$ |
Not every job needs Inconel. If a Hastelloy, Monel or stainless fitting will do the job, we will say so.
Inconel Pipe Fittings Applications
| Industry | Where Inconel pipe fittings are used | Preferred grade |
|---|---|---|
| Power generation | Boiler and steam-line piping, exhaust systems | 600, 625, 718 |
| Aerospace and defence | High-temperature ducting, engine bay piping | 718, 625 |
| Oil & gas | Offshore, sour-service and high-pressure piping | 625, 718 |
| Chemical & petrochemical | Reformer lines, reactor piping, acid transfer | 625, 600, 601 |
| Heat treatment and furnaces | Furnace ducting, radiant tube systems | 601, 600 |
| Marine and desalination | Seawater piping, offshore modules | 625 |
| Nuclear | Steam-generator and reactor piping | 600 |
| Pulp & paper, pollution control | Bleach plant and scrubber piping | 625, 601 |
Quality Assurance and Manufacturing Process
| Step | What happens |
|---|---|
| 1. Requirement review | We confirm grade, fitting type, size, schedule, standard and certificates |
| 2. Material sourcing | Forged blanks or fitting stock from approved mills, with heat number and MTC |
| 3. Forming | Hot forming (buttweld) or forging and machining (socket weld/threaded) |
| 4. Heat treatment | Solution annealing (600, 601, 625) or solution treat plus age (718) |
| 5. Machining and finishing | Bevelling, threading, facing to standard |
| 6. Inspection | Dimensional check, PMI, visual and marking |
| 7. Testing | Radiography, hydrostatic, IGC, ultrasonic or dye penetrant as specified |
| 8. Packing and dispatch | Capped, boxed or crated, marked, shipped with documents |
Tests Available on Request
- Chemical analysis and PMI
- Radiography (spot or 100%)
- Hydrostatic pressure test
- Intergranular corrosion (IGC) test
- Ultrasonic and dye penetrant testing
- Third-party inspection (TUV, SGS, Lloyd's, DNV or an agency of your choice)
Standards and Certifications
| Standard / certificate | What it covers |
|---|---|
| ASTM B366 / ASME SB366 | Factory-made wrought nickel and nickel alloy pipe fittings |
| ASME B16.9 | Dimensions of factory-made buttweld fittings |
| ASME B16.11 | Forged socket weld and threaded fittings |
| ASME B16.28 | Short radius elbows and returns |
| MSS-SP-43 | Buttweld fittings for small OD pipe |
| ASME B16.25 | Buttwelding end preparation |
| NACE MR0175 / MR0103 | Sour-service material requirements, where specified |
| EN 10204 3.1 / 3.2 | Mill test certificate; 3.2 with independent inspection |
| ISO 9001 [confirm details] | Quality management |
Inconel® is a registered trademark of Special Metals Corporation. Aashish Metals supplies to the equivalent UNS and ASTM specifications.
Inconel Pipe Fittings Price
| Price factor | Why it matters |
|---|---|
| Grade | 718 and 625 cost more than 600 or 601 because of alloying content |
| Fitting type and size | Larger and more complex shapes (tees, reducers) use more material and machining |
| Type of connection | Forged socket weld and threaded fittings differ in cost from buttweld |
| Wall thickness / schedule | Heavier schedules cost more |
| Testing and certification | Radiography, IGC and 3.2 certification add cost |
| Quantity | Larger orders reduce cost per piece |
| Nickel and alloy metals market | Base prices track LME nickel and alloying elements |
For an accurate quote, send grade, fitting type, size, schedule, standard, quantity, certificate level and delivery location, or a piping isometric.
Why Buy from Aashish Metals
- Traceable material. Heat number, MTC and PMI on every lot.
- One source for the whole line. Fittings, flanges, round bar, plates and fasteners in matching alloys.
- Straight technical advice. We flag grade, schedule and certification issues before you order.
- Testing on request. Up to 100% radiography, PMI, IGC and third-party inspection.
- Custom work. Fabricated and special fittings to drawing.
Read more about Aashish Metals, browse our technical blog, or contact our team. Need the pipe too? See Inconel pipes and tubes, or explore nickel alloy products and the materials guide.
FAQs Inconel Pipe Fittings
They connect, turn and reduce Inconel piping in high-temperature, high-pressure or corrosive lines: furnaces, boilers, chemical reactors, offshore piping and aerospace ducting, where carbon or stainless steel fittings would not hold up.
600 resists oxidation and caustic and chloride cracking at moderate strength. 625 adds molybdenum and niobium for much better pitting, crevice and chloride-cracking resistance, plus good weldability. For mixed or chloride-heavy service, 625 is the usual choice.
Buttweld and forged Inconel fittings are made to ASTM B366 / ASME SB366, with dimensions from ASME B16.9 (buttweld), B16.11 (forged socket weld and threaded) or B16.28 (short radius elbows), and MSS-SP-43 for small sizes.
No. Incoloy 825 (UNS N08825) is an iron-nickel-chromium alloy, a different family from Inconel, though it is often supplied and searched for alongside Inconel fittings because the applications overlap. We stock both.
Yes, primarily as socket weld and threaded types. Larger buttweld 601 fittings can be made to order; confirm size and lead time with us.
Buttweld fittings from 1/2″ to 48″, and forged socket weld and threaded fittings from 1/8″ to 4″, in schedules from SCH 5S up to XXS. Larger or special sizes are made to order.
There is no fixed price, since it depends on grade, fitting type, size, schedule, testing and quantity, and nickel and alloy metals markets move. Send your list or isometric for a current quote.
Need Inconel elbows, tees or reducers that match your pipe?
Send us your grade, fitting types, sizes and quantities, or attach a piping isometric. We will reply with a clear quote and the right certificates.
Products
Please feel free to contact us. We will get back to you with 2 business days. Or just call us now.
