Corrosion resistance
Strong resistance across many oxidizing and non-oxidizing media, with useful pitting and crevice-corrosion resistance.
Nickel-chromium-molybdenum alloy
Inconel 625 Plate, Sheet and Round Bar
A solid-solution strengthened nickel alloy selected for high strength, weldability and broad corrosion resistance in marine, chemical, aerospace and energy equipment.
Representative product-form image. Confirm actual surface, dimensions and condition with the quotation.Material overview
Why industrial buyers specify Inconel 625
Alloy 625 combines nickel, chromium, molybdenum and niobium. Molybdenum and niobium strengthen the matrix without a required precipitation-hardening treatment, while the chemistry supports resistance to pitting, crevice corrosion and chloride-ion stress-corrosion cracking.
Fabrication
Good weldability and fabricability for vessels, bellows, piping, ducting and formed components.
Strength
High tensile, fatigue and thermal-fatigue capability across a broad temperature range.
Technical reference
Composition and purchasing data
Values below are published reference limits. The purchase order, applicable specification and mill test certificate control the supplied material.
Limiting chemical composition, weight %
| Element | Published limit |
|---|---|
| Nickel | 58.0 min |
| Chromium | 20.0-23.0 |
| Molybdenum | 8.0-10.0 |
| Niobium + tantalum | 3.15-4.15 |
| Iron | 5.0 max |
| Cobalt | 1.0 max |
| Carbon | 0.10 max |
| Manganese | 0.50 max |
| Silicon | 0.50 max |
| Aluminum | 0.40 max |
| Titanium | 0.40 max |
Key material facts
- Designation
- UNS N06625; W.Nr. 2.4856
- Density
- 8.44 g/cm3
- Strengthening
- Solid-solution strengthening; precipitation hardening is not normally required.
- Temperature note
- Published reference data covers service from cryogenic temperature to about 982 C; design limits depend on environment, stress and specification.
- Common supply
- Plate, sheet, strip, round bar, flat bar and cut blanks
Technical reference: manufacturer technical bulletin. Typical data is for material selection only and is not a design guarantee.
Common specifications
Standards buyers frequently reference
Specification editions and permitted product forms change. Send the exact standard, revision and condition shown on your drawing or material list.
| Product or requirement | Common reference |
|---|---|
| Plate, sheet and strip | ASTM B443 |
| Rod and bar | ASTM B446 |
| Seamless pipe and tube | ASTM B444 |
| Forgings and fittings | ASTM B564 |
Availability is subject to grade, size, quantity, condition, certification and mill route. No standard listed here confirms stock.
Application areas
Where Inconel 625 is commonly evaluated
Final material selection belongs to the buyer's qualified engineer and must consider temperature, stress, fabrication, corrosion medium and governing code.
Marine and offshore
Seawater hardware, bellows, fasteners and submerged control components.
Chemical processing
Reaction vessels, distillation equipment, heat exchangers, piping and valves.
Aerospace
Ducting, exhaust systems, bellows, turbine seals and engine-control structures.
Energy
High-strength components where corrosion and temperature resistance are both required.
RFQ checklist
Information needed for an accurate quotation
Clear specifications shorten material matching and reduce repeated email clarification.
1. Grade and standard
Inconel 625, UNS N06625, ASTM/AMS/EN standard and required revision.
2. Product and dimensions
Plate, sheet, strip, round bar, flat bar and cut blanks. Include thickness, width, length, diameter and tolerances.
3. Condition
Annealed or solution-treated condition as required by the applicable specification
4. Quantity
Pieces, kilograms or total project quantity, plus any trial-order requirement.
5. Inspection
MTC type, chemistry, mechanical tests, NDT, dimensional report and third-party inspection.
6. Delivery
Destination country or port, required date, packing and Incoterm preference.
Fast alloy inquiry
Send your Inconel 625 size, quantity and destination.
We will review product form, specification, condition, certification and delivery requirements before preparing a targeted quotation.
Buyer questions
Inconel 625 FAQ
Quick answers for initial sourcing. Confirm critical engineering requirements against the governing specification.
Is Alloy 625 precipitation hardenable?
Alloy 625 is primarily solid-solution strengthened by molybdenum and niobium. Standard product does not require precipitation hardening to develop its basic strength.
Why is Alloy 625 used in seawater service?
Its nickel-chromium-molybdenum chemistry supports resistance to local attack, chloride-ion stress-corrosion cracking and corrosion fatigue.
What information is needed for an Alloy 625 quote?
Send the product form, ASTM or AMS standard, dimensions, quantity, condition, tolerances, certificate requirements and destination.
Related grades
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