Inconel 625 Tube Supplier, Stockist and Exporter
Table of Contents
Aurico Alloys LLP supplies Inconel 625 tube (N06625, Werkstoff 2.4856) to ASTM B444 from Mumbai, to customers across India and in more than 40 export markets.
Inconel 625 tube goes where chlorides would pit a stainless tube through. Seawater-cooled heat exchangers, offshore hydraulic and chemical-injection lines, and small-bore instrument tubing on a platform all run in the environment 625 was designed for: its 8–10% molybdenum and 3.15–4.15% niobium resist the pitting and crevice corrosion that attack 316L tube in warm seawater.
Sizes and Specifications
| Grade | Inconel 625 |
|---|---|
| UNS number | N06625 |
| Werkstoff (W.Nr.) | 2.4856 |
| Specifications | ASTM B444 (pipe and tube) |
| Size range | Outside diameter 3.0 mm to 254 mm with wall thickness 0.5 mm to 15 mm, in seamless and welded construction, random or cut lengths up to 6 m and longer to order. |
| Condition and finish | Supplied annealed and pickled, bright annealed or polished, in straight lengths, U-bends and coiled tubing for instrumentation. |
| 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 tube runs around 830–965 MPa tensile with yield above 415 MPa – roughly twice the yield of 316L, which is what lets a high-pressure control line or an exchanger tube run a thinner wall. It is strengthened without heat treatment, so bends and tube-to-tubesheet welds keep their properties as made.
Industry Applications
Why Inconel 625 tube
Two properties put 625 in tube form. Its pitting and crevice resistance survive seawater and chloride brines at the temperatures heat exchangers run at, and its strength in the annealed condition lets the wall come down, which matters in long offshore lines where every kilo is lifted. It is the default for chloride service; where hot, contaminated acid has already defeated 625, step up to 686 tube.
| Industry | Typical use |
|---|---|
| Offshore oil and gas | Hydraulic control and chemical-injection lines, and small-bore instrument tubing. |
| Marine | Seawater-cooled heat-exchanger and condenser tube. |
| Chemical processing | Exchanger tube in chloride-bearing and sulphuric acid service. |
| Aerospace | High-pressure tubing where strength per kilo governs. |
Testing and Certification
Tube ships with an EN 10204 3.1 mill test certificate stating heat number, chemical analysis and mechanical properties. We add hydrostatic and ultrasonic testing, positive material identification and ASTM G28 intergranular corrosion testing on request, can certify to NACE MR0175 / ISO 15156 for sour service, and arrange third-party release 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.