Inconel 625 Fittings Supplier, Stockist and Exporter
Table of Contents
Aurico Alloys LLP supplies Inconel 625 fittings (N06625, Werkstoff 2.4856) to ASTM B366 from Mumbai, to customers across India and in more than 40 export markets.
Crevice corrosion in a seawater line starts at the joints. Every fitting adds two welds and a change of direction where flow slows and deposits settle, which is exactly where chloride crevice attack begins. That is why a line built in 625 pipe is finished with 625 fittings rather than a cheaper alloy – the joint is the place the corrosion allowance was designed out.
Sizes and Specifications
| Grade | Inconel 625 |
|---|---|
| UNS number | N06625 |
| Werkstoff (W.Nr.) | 2.4856 |
| Specifications | ASTM B366 (factory-made wrought fittings) |
| Size range | Butt-weld fittings 1/2" to 48" NB in Sch 5S to Sch XXS; forged socket-weld and threaded fittings 1/8" to 4" NB in 3000#, 6000# and 9000# classes. |
| Condition and finish | Elbows (45° and 90°, long and short radius), tees (equal and reducing), reducers (concentric and eccentric), caps, stub ends, couplings, unions, plugs and bushings. |
| Certification | EN 10204 3.1 mill test certificate; 3.2 and third-party inspection on request |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | N06625 |
| Werkstoff / EN number | 2.4856 |
| Density | 8.44 g/cm3 |
| Melting range | 1290-1350 °C |
| Specific heat (21 °C) | 410 J/kg·°C |
| Fittings specification | ASTM B366 |
Identifiers and physical constants for Inconel 625. A dash means no such designation is published for this grade.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 58.0 | — |
| Chromium (Cr) | 20.0 | 23.0 |
| Iron (Fe) | — | 5.0 |
| Molybdenum (Mo) | 8.0 | 10.0 |
| Niobium + Tantalum (Nb+Ta) | 3.15 | 4.15 |
| Carbon (C) | — | 0.10 |
| Manganese (Mn) | — | 0.50 |
| Silicon (Si) | — | 0.50 |
| Phosphorus (P) | — | 0.015 |
| Sulfur (S) | — | 0.015 |
| Aluminium (Al) | — | 0.40 |
| Titanium (Ti) | — | 0.40 |
| Cobalt (Co) | — | 1.0 (if determined) |
Composition limits for Inconel 625. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical and Physical Properties
Fittings are supplied annealed, where 625 runs around 830–965 MPa tensile with yield above 415 MPa. Because it needs no post-weld heat treatment, a fitting welded into a line keeps the properties it was certified with.
Industry Applications
Why Inconel 625 fittings
In seawater and sour service, a fitting in the wrong alloy fails in a characteristic way: a galvanic couple where two alloys meet, crevice attack under deposits at the change in direction, or chloride cracking at a stressed weld. B366 fittings in 625 remove all three. They are also the natural choice where 625 is used as weld overlay on steel pipe, since the fitting then matches the corrosion-resistant layer it joins.
| Industry | Typical use |
|---|---|
| Offshore oil and gas | Elbows, tees and reducers in seawater, firewater and sour-service lines. |
| Marine | Fittings in seawater cooling and ballast systems. |
| Pollution control | Fittings on flue-gas desulphurisation and acid-condensate lines. |
| Chemical processing | Fittings for chloride-bearing acid piping. |
Testing and Certification
Every fitting is marked with grade and heat number and supplied with an EN 10204 3.1 certificate. Positive material identification confirms the molybdenum-niobium grade fitting by fitting, dye-penetrant testing checks bevels and formed surfaces, and dimensions are checked against the ordered schedule. NACE MR0175 / ISO 15156 certification and third-party inspection are available under our ISO 9001:2015 system.
Frequently Asked Questions
Request a Quotation
Send your size, quantity and specification and we will come back with price and lead time, usually the same working day. Call +91 7977 88 6611 or email info@auricoalloys.com.