Inconel 625 Pipes Supplier, Stockist and Exporter
Table of Contents
Aurico Alloys LLP supplies Inconel 625 pipe (N06625, Werkstoff 2.4856) to ASTM B444 from Mumbai, to customers across India and in more than 40 export markets.
A 625 pipe line is a seawater line, a sour-service line or an acid-condensate line – somewhere a carbon-steel or stainless system would need replacing within a few years. Offshore seawater and firewater systems, sour-gas process piping and flue-gas desulphurisation lines are built in it because 625 resists the pitting and crevice attack those fluids cause, and because it can be welded without losing the properties the line was designed on.
Sizes and Specifications
| Grade | Inconel 625 |
|---|---|
| UNS number | N06625 |
| Werkstoff (W.Nr.) | 2.4856 |
| Specifications | ASTM B444 (pipe and tube) |
| Size range | Nominal bore 1/8" to 30" in Sch 5S through Sch XXS, seamless and welded (ERW / EFW), single random, double random and cut lengths. |
| Condition and finish | Annealed and pickled, bright annealed or polished, with plain, bevelled or threaded ends. |
| Certification | EN 10204 3.1 mill test certificate; 3.2 and third-party inspection on request |
| Price | INR 4,500 – 10,000 per kg. Indicative USD 53 – 118 per kg; quoted against grade, form, size and quantity. |
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 |
| Pipe and tube specification | ASTM B444 |
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
Annealed 625 pipe runs around 830–965 MPa tensile with yield above 415 MPa, so for a given pressure rating the schedule can often come down against a stainless line. It is strengthened in the annealed condition, so field welds keep their properties without post-weld heat treatment.
Industry Applications
Why Inconel 625 pipe
The argument for 625 pipe is that the corrosion allowance in seawater and chloride brines can be kept small, because the alloy is not being eaten. It needs no post-weld heat treatment, which matters on an offshore module where a line is welded in place. It is the general-purpose alloy for this duty; where the service is hot, acid and heavily contaminated with halides, 686 pipe is the step up.
| Industry | Typical use |
|---|---|
| Offshore oil and gas | Seawater, firewater and produced-water lines, and sour-service process piping. |
| Marine | Seawater cooling and ballast systems. |
| Pollution control | Flue-gas desulphurisation and acid-condensate lines. |
| Chemical processing | Chloride-bearing and sulphuric acid process piping. |
Testing and Certification
Pipe is supplied with an EN 10204 3.1 mill test certificate stating heat number, chemical analysis and mechanical properties. Hydrostatic testing, ultrasonic examination, dye-penetrant testing of ends and positive material identification are available on request; we can certify to NACE MR0175 / ISO 15156 for sour service and arrange third-party inspection 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.