Inconel 686 Fittings Supplier, Stockist and Exporter
Table of Contents
Aurico Alloys LLP supplies Inconel 686 fittings (N06686, Werkstoff 2.4606) to ASTM B366 from Mumbai, to customers across India and in more than 40 export markets.
Nobody specifies 686 fittings for a line that is not already in 686. They are bought because a 686 line exists for a reason – a fluid that pitted the previous alloy – and the elbows and tees are where turbulence, deposits and weld heat-affected zones concentrate that attack. A fitting one alloy down is where the old failure comes back.
Sizes and Specifications
| Grade | Inconel 686 |
|---|---|
| UNS number | N06686 |
| Werkstoff (W.Nr.) | 2.4606 |
| 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 | N06686 |
| Werkstoff / EN number | 2.4606 |
| Density | 8.73 g/cm3 |
| Melting range | 1338-1380 °C |
| Electrical resistivity | 1.237 µΩ·m |
| Magnetic permeability (at 200 oersted / 15.9 kA/m) | 1.0001 |
| Fittings specification | ASTM B366 |
Identifiers and physical constants for Inconel 686. A dash means no such designation is published for this grade.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Chromium (Cr) | 19.0 | 23.0 |
| Molybdenum (Mo) | 15.0 | 17.0 |
| Tungsten (W) | 3.0 | 4.4 |
| Titanium (Ti) | 0.02 | 0.25 |
| Iron (Fe) | — | 2.0 |
| Carbon (C) | — | 0.01 |
| Manganese (Mn) | — | 0.75 |
| Sulfur (S) | — | 0.02 |
| Silicon (Si) | — | 0.08 |
| Phosphorus (P) | — | 0.04 |
| Nickel (Ni) | — | Balance |
Composition limits for Inconel 686. 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 solution annealed, where 686 runs around 720 MPa tensile. Carbon at 0.01% maximum keeps the heat-affected zones of the butt welds free of the carbide sensitisation that would invite intergranular attack.
Industry Applications
Why Inconel 686 fittings
The corrosion case for the line is only as good as its most exposed component, and in a piping system that is the fitting: flow changes direction, deposits settle in the intrados, and every fitting brings two more welds. B366 fittings in 686 keep that exposure in the same alloy as the pipe, welded with matching 686 filler so neither the fitting nor the weld becomes the weak point.
| Industry | Typical use |
|---|---|
| Pollution control | Elbows and tees in flue-gas acid-condensate and scrubber lines. |
| Pulp and paper | Fittings in chlorine dioxide bleach plant piping. |
| Waste treatment | Fittings on incineration scrubber and quench systems. |
| Chemical processing | Fittings for halide-contaminated mixed-acid lines. |
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-tungsten grade, 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.