Monel Pipe Fittings Supplier in India — Monel 400 & K500
Home > Materials > Monel Products > Monel Pipe Fittings
Aashish Metals is a reputed supplier and stockist of Monel pipe fittings in India stocking Monel 400 and Monel K500 buttweld, socket weld and threaded pipe fittings from our Mumbai office. Our Monel pipe fittings are available in seamless, welded and fabricated forms and meet ASTM B366 / ASME SB366 and dimensional requirements ASME/ANSI B16.9, B16.28, MSS-SP-43, and MSS-SP-75 from 1/8″ NB to 48″ NB in all Sch 5s to XXS sizes. Monel is a special alloy of nickel/copper that is highly resistant to seawater, has high strength and performs well in reducing environments in which standard stainless steel fittings rapidly fail, such as in marine engineering, offshore oil & gas, HF acid handling, and chemical processing. You can either order 90° long radius elbows for pipeline installation for offshore projects or concentric reducers for chemical plant or stub ends for desalination evaporator systems and they will be available from the same week with proper MTCs with Aashish Metals with regular delivery schedules. Our Monel 400 pipe fittings are in stock.
What Are Monel Pipe Fittings?
Monel pipe fittings are large-bore piping components elbows, tees, reducers, caps, stub ends, and pipe bends manufactured from Monel nickel-copper alloy for use in high-pressure, high-temperature, and highly corrosive pipeline systems. They are used to change flow direction, branch piping, manage pipe size transitions, and terminate or cap process lines, replacing stainless steel fittings wherever the process medium seawater, hydrofluoric acid, sulphuric acid, or caustic solutions would cause stainless to fail.
Monel is preferred in mildly oxidising environments and performs outstandingly in reducing conditions, with excellent resistance to seawater and steam at high temperatures. It is used in power generation, gas processing, specialty chemicals, heat exchangers, condensers, and pulp & paper industries.
Monel Pipe Fittings Grade
Monel 400 (UNS N04400 / Werkstoff Nr. 2.4360) — Standard nickel-copper alloy with ~67% Ni and ~32% Cu. Excellent general-purpose corrosion resistance for marine, chemical, and HF acid service. Slightly magnetic at room temperature. Lower cost.
Monel K500 (UNS N05500 / Werkstoff Nr. 2.4375) — Precipitation-hardenable variant adding Al (~2.7%) and Ti (~0.6%), delivering tensile strength up to 1,100 MPa vs ~550 MPa for annealed Monel 400. Non-magnetic above −100 °C. Specified for high-strength shafting, springs, fasteners, and pump impellers in corrosive environments.
For instrumentation-grade connections in the same alloy, see our Monel 400 tube fittings. For complementary products, explore Monel 400 round bars, Monel 400 sheets and plates, Monel 400 pipes and tubes, and the full Monel products range.
Technical data
Monel Pipe Fittings Technical Specification
| Parameter | Details |
|---|---|
| Standard | ASTM B366 / ASME SB366 |
| Dimensional standards | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, MSS-SP-75 |
| Size range | 1/8" NB to 48" NB (Seamless, Welded & Fabricated) |
| Schedule / wall thickness | Sch 5s, 10s, 40s, 80s, 160s, XXS |
| Type | Seamless / Welded (100% X-Ray) / Fabricated |
| Bending radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom |
| Material grades | Monel 400 (UNS N04400), Monel K500 (UNS N05500) |
| Werkstoff Nr. | 2.4360 (Monel 400), 2.4375 (Monel K500) |
| Stock range (ex-stock) | 1/8" NB to 12" NB in standard schedules |
| Custom fabricated sizes | Available on request; minimum order quantities apply |
| Elbow angles | 45°, 90° (Short Radius & Long Radius), 180° Return Bend |
| Reducer types | Concentric & Eccentric |
| End types | Plain End, Bevelled End, Threaded |
| Test certificates | EN 10204 Type 3.1 / 3.2, PMI, Third-Party Inspection |
Monel 400 vs Monel K500 — Which Grade Do You Need?
| Property | Monel 400 (UNS N04400) | Monel K500 (UNS N05500) |
|---|---|---|
| Tensile strength | ~550 MPa (annealed) | ~900–1,100 MPa (age-hardened) |
| Hardness | ~130 HB | ~250 HB |
| Magnetic properties | Slightly magnetic at room temperature | Non-magnetic above −100 °C |
| Key additions | Ni ~67%, Cu ~32% | Ni ~65%, Cu ~30%, Al ~2.7%, Ti ~0.6% |
| Werkstoff Nr. | 2.4360 | 2.4375 |
| Best for | Marine, chemical, general corrosion service | High-strength shafting, springs, fasteners, pump impellers |
| Price point | Lower | Higher (age-hardening process required) |
Monel 400 Buttweld Fittings — Approximate Weight Reference (kg)
| Size NB | 90° LR elbow Sch 40s | 90° LR elbow Sch 80s | Equal tee Sch 40s | Conc. reducer Sch 40s | Cap Sch 40s |
|---|---|---|---|---|---|
| 1/2" | 0.06 | 0.08 | 0.09 | 0.05 | 0.03 |
| 1" | 0.18 | 0.22 | 0.27 | 0.14 | 0.09 |
| 2" | 0.68 | 0.82 | 1.02 | 0.54 | 0.32 |
| 3" | 1.60 | 2.00 | 2.40 | 1.30 | 0.75 |
| 4" | 3.20 | 4.00 | 4.80 | 2.50 | 1.40 |
| 6" | 8.50 | 10.80 | 12.80 | 6.80 | 3.80 |
| 8" | 18.00 | 23.00 | 27.00 | 14.50 | 8.00 |
Weights are approximate. Actual values may vary by manufacturing method and heat. Contact us for certified weight charts.
Manufacturing Standards
| Standard | Scope | Products covered |
|---|---|---|
| ASME B16.9 | Factory-Made Wrought Buttwelding Fittings | Long Radius Elbows, Reducing Elbows, Long Radius Returns, Short Radius Elbows, 3D Elbows, Straight/Reducing Crosses, Reducing Outlet Tees, Lap Joint Stub Ends, Caps, Reducers |
| ASME B16.28 | Short Radius Elbows and Returns | Monel Short Radius Elbows, Monel Short Radius 180° Returns |
| MSS SP-43 | Fabricated Fittings for Low Pressure / Corrosion Resistance | Long Radius Elbows, Normal Radius and Reducing Tees, Lap Joint Stub Ends, Caps, 180° Returns, Concentric & Eccentric Reducers |
| MSS SP-75 | High-Test Wrought Butt-Welding Fittings | Long Radius Elbows, 3R Elbows, Straight Tees, Reducing Outlet Tees, Caps, Reducers |
Quality Testing & Assurance
All Monel pipe fittings from Aashish Metals are subject to the following quality checks before dispatch:
- Chemical Analysis & Hardness Testing
- Pitting Resistance & Intergranular Corrosion (IGC) Test
- Micro and Macro Analysis
- Flattening and Flaring Tests
- Hydrostatic Testing
- X-Ray / Radiographic Testing (for welded fittings)
All material test certificates are issued as per EN 10204 Type 3.1 / 3.2, with third-party inspection available from TPIA-approved agencies (Bureau Veritas, SGS, TÜV, Lloyd's). NABL-accredited chemical and mechanical test reports are available on request.
Standards & Certifications: Standards We Supply Against
| Standard | Specification | Application |
|---|---|---|
| ASTM | B366 | Nickel alloy pipe fittings |
| ASME | SB366 | Pressure vessel pipe fittings |
| ASME/ANSI | B16.9 | Factory-made wrought buttwelding fittings |
| ASME | B16.28 | Short radius elbows and returns |
| MSS | SP-43 | Fabricated fittings — low pressure/corrosion resistance |
| MSS | SP-75 | High-test wrought butt-welding fittings |
| NACE | MR0175 / ISO 15156 | Sour gas / H₂S service (on request) |
| ISO | 9001:2015 | Quality management system |
Test Certificates Available
- EN 10204 Type 3.1 (standard with every order)
- EN 10204 Type 3.2 (third-party witnessed — on request)
- PMI (Positive Material Identification) Report
- Third-Party Inspection (Bureau Veritas, SGS, Lloyd's, TÜV)
- Country of Origin Certificate, NABL Accredited Lab Report
Socket Weld & Threaded Fittings
In addition to buttweld fittings, Aashish Metals supplies Monel socket weld and threaded fittings for smaller-bore piping systems, instrumentation headers, and high-pressure tubing connections.
Monel 400 Socket Weld Fittings — Our Monel 400 socket weld fittings include socket weld elbows, tees, reducers, unions, and couplings for Class 3000 and 6000 high-pressure connections in small bore (1/8″ to 4″ NB) piping systems. Socket weld fittings are preferred where radiographic examination of the joint is not practical and where leak-tight connections in aggressive media are critical.
Monel 400 Threaded Fittings — Our Monel 400 threaded fittings include NPT and BSP threaded elbows, tees, unions, couplings, nipples, and plugs for instrument connections, vent and drain points, and low-pressure auxiliary piping in marine, chemical, and oil & gas systems.
For instrumentation-grade tube connections in Monel 400, see our Monel 400 tube fittings.
Where Monel Pipe Fittings Are Specified
Marine Engineering Monel 400 pipe fittings are a standard material for ship hulls, heat exchanger shells, seawater piping systems, condensers, seawater valves, and offshore platform process piping. Monel’s near-immunity to seawater pitting and crevice corrosion makes it uniquely suited to these environments.
Offshore Oil & Gas Monel pipe fittings are specified for offshore drilling rig pipework, sour gas (H₂S) processing facilities, wellhead components, and subsea pipelines operating in chloride-rich, high-pressure environments where austenitic stainless steels suffer stress-corrosion cracking.
Chemical Processing — HF Acid & Specialty Chemicals Monel is the material of choice for hydrofluoric acid (HF) alkylation unit piping — both the HF itself and the associated hydrocarbon and water streams. Monel 400 is specified for HF acid handling, alkylation unit elbows, reducers, and fittings throughout refineries. It is also used in specialty chemical plants, hydrogen fluoride production, and fluorinated polymer manufacturing.
Power Generation Nuclear and fossil fuel power plants use Monel pipe fittings in feedwater heater piping, steam-side condensate return lines, and heat exchanger tube sheet applications where Monel’s resistance to steam and high-temperature water is essential.
Desalination Plants Monel 400 is specified for evaporator tubing, brine piping, and brine handling systems in multi-stage flash (MSF) and multi-effect distillation (MED) desalination plants, where hot chloride brines at elevated temperatures rapidly corrode stainless steel.
Pulp & Paper Monel fittings are used in bleaching equipment, digesters, and wash systems handling chlorine, chlorine dioxide, caustic soda, and sulphide solutions. For manifold valves and needle valves in these systems, see our Monel 400 manifold valves and Monel 400 needle valves.
FAQs - Monel Pipe Fittings
Monel pipe fittings primarily conform to ASTM B366 / ASME SB366. Dimensional standards are ASME/ANSI B16.9 (buttweld fittings), ASME B16.28 (short radius elbows and returns), MSS-SP-43 (fabricated fittings — low pressure/corrosion resistance), and MSS-SP-75 (high-test wrought butt-welding fittings).
Aashish Metals supplies Monel pipe fittings from 1/8″ NB to 48″ NB in seamless, welded, and fabricated forms. Standard schedules from Sch 5s to XXS. Ready stock covers 1/8″ NB to 12″ NB for same-week dispatch; larger sizes on request.
Monel 400 (N04400) is the standard grade — excellent seawater and chemical corrosion resistance at a lower price. Monel K500 (N05500) adds Al and Ti to achieve up to 1,100 MPa tensile strength in the age-hardened condition vs ~550 MPa for Monel 400 — specified where higher mechanical strength is needed alongside the same corrosion resistance.
Monel 400 is preferred over stainless steel in reducing environments, HF acid service, seawater piping, and applications where chloride stress-corrosion cracking rules out austenitic stainless steels. While stainless fittings corrode rapidly in HF acid and seawater, Monel resists both. It also outperforms 316L in caustic (NaOH) service and brine handling.
Monel 400 is slightly magnetic at room temperature. Monel K500, in its age-hardened condition, is non-magnetic above −100 °C — which is important for subsea and aerospace applications where magnetic interference is a concern.
Monel pipe bends are available in 1D, 2D, 3D, 5D, 6D, 8D, and 10D bending radii, or custom radius on request. Short-radius elbows (SR — 1D) and long-radius elbows (LR — 1.5D) are standard stock items.
Yes. Monel 400 meets NACE MR0175 / ISO 15156 requirements for sour gas service. Its resistance to H₂S-induced stress cracking and chloride stress-corrosion cracking makes it a viable alternative to other nickel alloys in offshore and gas processing environments.
Get a Fast Quote for Monel Tube Fittings
Whether you need a handful of Monel 400 male connectors for an instrument loop upgrade or a full bill-of-materials for a new offshore skid, Aashish Metals has the ready stock, the certifications, and the technical knowledge to deliver at a competitive price.
Products
Please feel free to contact us. We will get back to you with 2 business days. Or just call us now.
