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Inconel® 625
Alloy 625
UNS N06625
W.Nr. 2.4856
NiCr22Mo9Nb
Inconel 625 / Alloy 625 Supplier Plate, Sheet, Pipe, Tube, Bar & Forgings
TiAlloy supplies Nickel Alloy 625 / UNS N06625 plate, sheet, strip, seamless pipe and tube, welded pipe and tube, round bar, rod, wire and forged products for marine, offshore, chemical processing, heat exchanger, oil & gas and high-performance industrial applications.
Supply forms
Plate & Sheet
Strip
Seamless Pipe & Tube
Welded Pipe & Tube
Bar & Rod
Wire
Forgings
Common specifications
ASTM B443 / ASME SB443
·
ASTM B444 / ASME SB444
·
ASTM B446 / ASME SB446
·
ASTM B564
·
ASTM B704
·
ASTM B705
Views
Material
UNS N06625 · W.Nr. 2.4856
Nickel-Chromium-Molybdenum-Niobium alloy
Grade 1
Annealed Condition
Product specification and order requirements govern acceptance
Grade 2
Solution-Annealed Condition
Confirm the required condition with the applicable specification
ASTM B446 Grade 3
High-Strength Rod / Bar Route
Solution annealed and cold worked where Grade 3 is specified
Alloy 625 Product Forms
Inconel 625 Plate, Pipe, Tube, Bar & Forged Products
TiAlloy supplies Alloy 625 / UNS N06625 in flat, tubular and long-product forms. Availability is confirmed by product type, dimensions, quantity and applicable purchase specification.
Alloy 625 Plate, Sheet & Strip
Plate, sheet, strip and cut-to-size flat products for fabrication and industrial components.
Inconel 625 Pipe & Tube
Seamless and welded pipe and tube for industrial piping, heat-transfer and fabricated equipment.
Alloy 625 Bar, Rod & Forgings
Round bar, rod, wire and forging stock for machined and drawing-based components.
Available Supply Forms Exact availability is confirmed with the quotation.
Inconel 625 Plate
Alloy 625 Sheet
625 Strip
625 Seamless Pipe
625 Seamless Tube
625 Welded Pipe
625 Welded Tube
625 Round Bar
UNS N06625 Rod
625 Wire
625 Forgings
Custom Machined Parts
For quotation
Send the product form, dimensions, quantity and destination. The applicable ASTM / ASME specification, material condition and inspection requirements are confirmed with the order scope.
625
Nickel Alloy · UNS N06625
Request Alloy 625 Size & Price
Send the required form, dimensions and quantity for availability, pricing and delivery review.
Product Form
Size
Quantity
Standard
Inspection
Destination
Alloy 625 Ordering Standards
Alloy 625 Standards, Grades & Ordering Conditions
UNS N06625 identifies the alloy, not the complete order. Product form, specification, heat-treatment condition, dimensions and inspection requirements should be confirmed before purchase.
Flat Products
Alloy 625 Plate, Sheet & Strip
ASTM / ASME
ASTM B443 / ASME SB443
AMS
AMS 5599 when specified by drawing or purchase order.
Grade / Condition
Grade 1 — Annealed · Grade 2 — Solution Annealed.
Order With
Thickness · Width · Length · Condition · Surface /
edge requirement · Inspection.
Seamless Products
Alloy 625 Seamless Pipe & Tube
ASTM / ASME
ASTM B444 / ASME SB444
General Requirements
ASTM B829 / ASME SB829 where applicable.
Grade / Condition
Grade 1 — Annealed · Grade 2 — Solution Annealed.
Order With
Pipe / tube · OD / NPS · Wall / schedule · Length ·
Condition · Testing.
Welded Tubular Product
Alloy 625 Welded Tube
ASTM / ASME
ASTM B704 / ASME SB704
General Requirements
ASTM B751 / ASME SB751 where applicable.
Product Scope
Welded boiler, heat-exchanger and condenser tubing.
Order With
OD · Wall · Length · Weld / finish requirement ·
Testing · Documentation.
Welded Pipe
Alloy 625 Welded Pipe
ASTM / ASME
ASTM B705 / ASME SB705
General Requirements
ASTM B775 / ASME SB775 where applicable.
Supply Condition
Weld requirements and applicable NDT are confirmed
against the purchase specification.
Order With
NPS / OD · Wall / schedule · Length · Quantity ·
NDT / hydro · End preparation.
Long Products
Alloy 625 Rod & Bar
ASTM / ASME
ASTM B446 / ASME SB446
AMS
AMS 5666 when specified.
Grade / Condition
Grade 1 — Annealed · Grade 2 — Solution Annealed ·
Grade 3 — Solution Annealed + Cold Worked.
Order With
Diameter / section · Length · Grade · Surface ·
Straightness · Inspection.
Forged / Wrought Components
Alloy 625 Forgings & Fittings
Forgings
ASTM B564 / ASME SB564
Fittings
ASTM B366 / ASME SB366
Condition
Heat treatment and finished-part requirements are confirmed
from specification and drawing.
Order With
Component · Drawing · Dimensions · Machining allowance ·
NDT · Certification.
Ordering principle
UNS N06625 identifies the alloy family only. A workable purchase requirement also defines product form, applicable specification, grade or heat-treatment condition, dimensions, quantity and inspection/documentation.
625
Nickel Alloy · UNS N06625
Request an Alloy 625 Standard & Condition Review
Send the purchasing specification and dimensions so the quotation can be matched to the required product form and condition.
Product Form
Standard
Condition
Size
Quantity
Inspection
Alloy 625 Supply Route
How TiAlloy Coordinates Alloy 625 Supply & Processing
TiAlloy coordinates Alloy 625 / UNS N06625 material sources, qualified processors, testing resources and export preparation according to the confirmed order scope. The exact route depends on product form, specification, dimensions and required inspection.
Material Source
Alloy 625 is sourced against the confirmed product specification, form and purchasing condition.
Processing
Cutting, sawing, machining, grinding or other processing can be coordinated where the order requires it.
Inspection
Dimensional inspection, PMI, NDT and additional testing are arranged when specified and applicable.
Documentation
Heat-number records, MTC documentation and inspection reports are collected against the purchase requirement.
Export Release
Marking, packing and shipment preparation are coordinated before final export release.
Supply boundary
TiAlloy does not represent every production step as an in-house operation. Manufacturing and processing routes vary by Alloy 625 product form, specification and order scope; source mills, qualified processors, laboratories and third-party inspectors are coordinated where applicable or requested.
625
Nickel Alloy · UNS N06625
Confirm Your Alloy 625 Supply Route
Send the required form, dimensions, processing and inspection scope for source, production-route and delivery review.
Product Form
Size
Quantity
Processing
Inspection
Destination
UNS N06625 Material Properties
Inconel 625 Chemical Composition, Physical & Mechanical Properties
Alloy 625 / UNS N06625 / 2.4856 combines nickel, chromium, molybdenum and niobium to provide the strength and material-property profile required in demanding industrial applications.
Ni
≥58.0%
Nickel
Cr
20–23%
Chromium
Mo
8–10%
Molybdenum
Nb + Ta
3.15–4.15%
Niobium + Tantalum
Alloy 625 / UNS N06625 Composition
| Element | Content | Element | Content |
|---|---|---|---|
| Ni | 58.0 min. | Cr | 20.0–23.0 |
| Mo | 8.0–10.0 | Nb + Ta | 3.15–4.15 |
| Fe | 5.0 max. | C | 0.10 max. |
| Mn | 0.50 max. | Si | 0.50 max. |
Other limiting elements include: Al ≤0.40%, Ti ≤0.40%, P ≤0.015%, S ≤0.015% and Co ≤1.0% when determined.
Inconel 625 Density
8.44 g/cm³
0.305 lb/in³
Melting Range
1290–1350°C
2350–2460°F
Thermal Conductivity
9.8 W/m·°C
approx. 21°C
Elastic Modulus
207.5 GPa
annealed · approx. 21°C
Inconel 625 Mechanical Properties
Typical room-temperature reference ranges. Final acceptance follows the applicable specification.
| Product / Condition | Tensile Strength | 0.2% Yield Strength | Elongation |
|---|---|---|---|
| Rod / Bar / Plate · Annealed | 827–1034 MPa | 414–655 MPa | 30–60% |
| Rod / Bar / Plate · Solution Treated | 724–896 MPa | 290–414 MPa | 40–65% |
| Cold-Drawn Pipe / Tube · Annealed | 827–965 MPa | 414–517 MPa | 30–55% |
Grade 1
Annealed
Common annealed purchasing condition.
Grade 2
Solution Annealed
Used where the applicable specification requires elevated-temperature creep / rupture performance.
ASTM B446 Grade 3
Solution Annealed + Cold Worked
Rod/bar condition for higher-strength requirements.
Temperature performance
Cryogenic Properties
Published Alloy 625 data include useful toughness at temperatures down to -196°C / -320°F.
High-Temperature Properties
Material condition becomes important where creep and rupture resistance are part of the service requirement.
Reference data only: chemistry limits, physical properties and typical mechanical values do not replace ASTM / ASME / AMS acceptance requirements for the selected product form and condition.
625
UNS N06625 · 2.4856
Request Alloy 625 Material Data & Quotation
Send the required form, specification and condition for material-data and quotation review.
Product Form
Standard
Condition
Size
MTC
Seawater & Chloride Service
Inconel 625 Corrosion Resistance in Seawater & Chloride Service
Alloy 625 / UNS N06625 is widely considered for seawater, brackish water and chloride-bearing environments because of its resistance to localized corrosion and chloride-induced stress-corrosion cracking. Actual performance still depends on temperature, deposits, crevice geometry, flow and fabrication condition.
Seawater & Brackish Water
Inconel 625 seawater resistance is one of the alloy’s established strengths. Published material data report very low corrosion rates in marine environments and strong resistance in both seawater and brackish-water service.
Pitting & Crevice Corrosion
Chromium and molybdenum contribute to strong Alloy 625 pitting and crevice-corrosion resistance in chloride-containing media. Tight crevices, however, still require specific review rather than assuming universal immunity.
Chloride Stress-Corrosion Cracking
The nickel-rich composition gives UNS N06625 strong resistance to chloride-induced stress-corrosion cracking, an important difference from many lower-nickel stainless steels in severe chloride exposure.
General Process Corrosion
Alloy 625 also provides broad resistance to many mineral acids, alkalis and organic acids under oxidizing and reducing conditions, while published data additionally note high resistance to erosion-corrosion.
Where 625 still needs review
Inconel 625 should not be treated as corrosion-proof. Very tight crevices can still produce severe localized attack in seawater, and temperature, stagnant deposits, chloride concentration, geometry and fabrication history can change corrosion behavior. More highly alloyed Ni-Cr-Mo materials may be required where the exposure exceeds the practical corrosion margin of Alloy 625.
Useful RFQ service data
Process Medium
Chloride Level
Temperature
Pressure
Flow Condition
Crevice / Deposit Risk
Product Form
625
Nickel Alloy · UNS N06625
Review Alloy 625 for Your Corrosive Environment
Send the service medium and operating conditions with the required product form for material and quotation review.
Medium
Chlorides
Temperature
Pressure
Product Form
Quantity
Oil & Gas · Offshore · Subsea
Inconel 625 for Oil & Gas, Subsea & Sour Service
Alloy 625 / UNS N06625 is used in offshore, subsea and oil & gas equipment where chloride exposure, mechanical loading and H₂S-containing environments place greater demands on material selection. Sour-service orders must still be reviewed against the applicable NACE MR0175 / ISO 15156 and project requirements.
Environment
H₂S / Sour Service
Exposure
Seawater / Chlorides
Service
Offshore / Subsea
Qualification
Project-Specific
Offshore & Subsea Service
Inconel 625 subsea and offshore components are considered where seawater, chlorides, pressure and mechanical requirements make lower-alloy materials less suitable for the project environment.
Sour-Service Requirements
UNS N06625 can be specified for sour-service applications, but the alloy designation alone does not establish compliance. Applicable NACE MR0175 / ISO 15156 requirements, environment, product condition and project specification must be confirmed.
Product Forms & Components
Oil & gas procurement can involve Alloy 625 pipe and tube, round bar, forging stock, valve components, connectors and fastener stock. The applicable material specification should be matched to the actual product form.
Order & Qualification Review
The RFQ should identify the required specification, material condition, dimensions and project-defined testing or qualification requirements before the production and inspection route is confirmed.
Is Inconel 625 suitable for sour service?
Alloy 625 / UNS N06625 is used in H₂S-containing oil and gas applications, but suitability cannot be determined from the grade name alone. NACE MR0175 / ISO 15156 is a material-selection and qualification framework for H₂S-containing environments, and it supplements rather than replaces the applicable equipment design code or project specification.
Sour-service RFQ data
H₂S Requirement
Operating Temperature
pH / Process Environment
Chlorides
Product Form
Material Condition
Project Specification
Testing Scope
625
UNS N06625 · Oil & Gas CRA
Alloy 625 for Oil & Gas Procurement
Send the required product form, project specification and sour-service requirements for supply and quotation review.
Product Form
NACE / ISO Requirement
H₂S
Temperature
Size
Quantity
Welding · Fabrication · CRA
Inconel 625 Welding, Weld Overlay & CRA Cladding
Alloy 625 / UNS N06625 is used both as a solid corrosion-resistant alloy and as welding or cladding material. These supply routes should be distinguished before the welding, processing and inspection scope is quoted.
Inconel 625 Welding
Alloy 625 can be joined using conventional welding processes under an appropriate qualified procedure. ERNiCrMo-3 is a common Alloy 625 welding wire and filler-metal designation, while ENiCrMo-3 is used for covered electrodes.
Common reference:
AWS A5.14 ERNiCrMo-3 ·
ENiCrMo-3
Alloy 625 Weld Overlay & CRA Cladding
Alloy 625 weld overlay deposits a corrosion-resistant nickel-alloy layer onto a lower-alloy substrate. It can be specified for CRA-clad pipe, fittings and equipment surfaces, but it is not the same purchase item as a solid UNS N06625 component.
Quote basis may depend on:
substrate ·
finished overlay thickness ·
area ·
inspection
Welding / cladding RFQ
Solid Alloy 625 and Alloy 625 CRA overlay should be quoted as different manufacturing routes. TiAlloy coordinates the applicable processing route according to the confirmed order scope rather than representing every operation as an in-house process.
Base Material
Component Size
Welding / Cladding Scope
Finished Thickness
WPS / PQR
Inspection
625
UNS N06625 · Welding & CRA
Request Alloy 625 Welding or Cladding Supply
Send the component, substrate and finished Alloy 625 requirement for processing and quotation review.
Substrate
Size
Overlay Scope
Thickness
Inspection
Quantity
Sizes · Dimensions · Processing
Inconel 625 Sizes, Dimensions & Custom Processing
Alloy 625 / UNS N06625 can be quoted in standard and custom dimensions across flat, tubular and long-product forms. Availability is confirmed against the required specification, condition, dimensions and quantity.
Flat Products
Plate · Sheet · Strip
Inconel 625 plate, sheet and strip
Specify: Thickness × Width × Length together with quantity and required condition.
Tubular Products
Pipe · Tube
Seamless and welded Alloy 625 pipe / tube
Specify: OD or NPS × Wall Thickness / Schedule × Length plus end condition where required.
Long Products
Round Bar · Rod · Forging Stock
Inconel 625 bar, rod and forging stock
Specify: Diameter × Length with tolerance, quantity and processing requirement.
Custom processing
Processing can be reviewed according to the required product form, dimensions, tolerance and final supply condition.
Cut to Length
Saw Cutting
Grinding
Peeling
Turning
Machining
Edge Preparation
What dimensions should I send?
For Inconel 625 plate, send thickness × width × length. For 625 pipe or tube, send OD or NPS × wall thickness or schedule × length. For Alloy 625 round bar, send diameter × length.
625
UNS N06625 · Custom Size
Request Alloy 625 Size & Processing Review
Send the required product form and dimensions for availability, processing and quotation review.
Product Form
Dimensions
Tolerance
Length
Processing
Quantity
Alloy Comparison
Inconel 625 vs 718, C276, C22, 600 & 316L
Compare Alloy 625 with common nickel alloys and stainless steel by the main reason each material is normally considered.
625 vs
Inconel 718
Corrosion resistance, weldability and useful strength without age hardening.
VS
718 is preferred when much higher age-hardened strength is required.
625 vs
Hastelloy C276
Strong balance of corrosion resistance and mechanical strength for marine and industrial service.
VS
C276 is more strongly focused on severe chemical-process corrosion.
625 vs
Hastelloy C22
Well suited to fabricated marine, offshore and corrosion-resistant equipment.
VS
C22 is considered for broader aggressive chemical-media resistance.
625 vs
Inconel 600
Mo and Nb support higher strength and improved localized-corrosion resistance.
VS
600 is a simpler Ni-Cr alloy for heat and oxidation-related service.
625 vs
316L Stainless Steel
Better suited to demanding chloride, seawater and higher-load service.
VS
316L is the lower-cost choice for many general stainless applications.
Selection Note
Final material choice still depends on corrosion environment, temperature, strength, fabrication route and project specification. Alloy 825 may also be considered for some corrosion-service projects.
625
UNS N06625 · Comparison
Compare Alloy 625 for Your Application
Send the operating conditions and product requirement for quotation review.
Medium
Temperature
Pressure
Product Form
Standard
Quantity
Industries · Equipment · Applications
Inconel 625 Industries & Equipment Applications
Alloy 625 is used across marine, oil and gas, chemical, heat-transfer and high-temperature equipment where corrosion resistance and mechanical performance are required together.
Marine
Marine & Offshore
Alloy 625 is used in equipment exposed to seawater, chlorides and demanding offshore operating conditions.
Seawater piping · valves · pump components · marine hardware
Oil & Gas
Subsea & Oilfield Equipment
UNS N06625 is used for selected oilfield and subsea components that combine corrosion and mechanical demands.
Subsea connectors · valve parts · pressure components · piping
Process Industry
Chemical Processing
Inconel 625 is applied in process equipment where corrosion resistance and fabrication performance are important.
Process piping · reactors · scrubbers · vessel components
Heat Transfer
Heat Exchangers & Desalination
Alloy 625 tube and fabricated parts are considered for heat-transfer systems handling seawater or corrosive media.
Heat exchanger tubes · seawater systems · desalination equipment
High Temperature
Power & High-Temperature Equipment
Alloy 625 is used for fabricated components where elevated temperature and corrosion resistance must be considered together.
Expansion joints · exhaust systems · power equipment · hot-service parts
Aerospace
Aerospace & Engine Components
Alloy 625 is used in selected aerospace and engine-related components requiring fabrication and elevated-temperature performance.
Exhaust ducts · fabricated hot-section parts · engine hardware
625
UNS N06625 · Application Supply
Request Alloy 625 for Your Equipment
Send the application, product form and required dimensions for availability and quotation review.
Application
Product Form
Size
Standard
Quantity
Inspection
Real Supply Cases · Alloy 625
Alloy 625 Supply Cases
Selected UNS N06625 supply cases across offshore, petrochemical, marine, valve, pressure-vessel and heat-exchanger projects.
UAE
CASE 01
Offshore Seawater Injection Project
- Product
- Alloy 625 / UNS N06625 Seamless Pipe
- End Use
- Seawater injection lines · offshore process piping
Saudi Arabia
CASE 02
Petrochemical Process Piping Project
- Product
- Alloy 625 Pipe
- End Use
- Chemical transfer piping · reactor connections
United States
CASE 03
Oil & Gas Valve Manufacturing
- Product
- Alloy 625 Round Bar
- End Use
- Valve stems · shafts · seats · machined components
Singapore
CASE 04
Marine Pump Equipment Project
- Product
- Alloy 625 Bar / Rod
- End Use
- Pump shafts · fasteners · threaded components
Germany
CASE 05
Chemical Pressure Vessel Project
- Product
- Alloy 625 Plate
- End Use
- Vessel shells · heads · internal plates
South Korea
CASE 06
Heat Exchanger Equipment Project
- Product
- Alloy 625 Plate / Sheet
- End Use
- Tube sheets · covers · baffles
Order Evidence
Mill Test Certificate
Heat Number
Product Photos
Inspection Records
Packing / Shipping Records
625
UNS N06625 · Real Supply Cases
Request an Alloy 625 Supply Quote
Send your material, dimensions and inspection requirements for quotation review.
Product Form
Dimensions
Standard
Inspection
Quantity
Inspection · Documentation · Commercial Supply
Alloy 625 Inspection, Testing & Supply Documentation
Alloy 625 inspection, traceability and commercial documents are defined by product specification, order scope and project requirements.
01 · Quality Control
Inspection & Testing
Chemical Analysis
Mechanical Testing
PMI
Dimensional Inspection
NDT
Inspection scope follows the applicable product specification and confirmed purchase requirements. Additional PMI, NDT or third-party inspection can be arranged when agreed in the order.
02 · Documentation
MTC, Heat Number & Traceability
Heat Number
MTC / MTR
EN 10204 3.1
Inspection Records
Product Marking
Material identification and supporting records are coordinated with the confirmed supply scope and documentation requirements.
03 · Procurement
Quotation & Commercial Supply
MOQ
Lead Time
Packing
Incoterms
Destination
Required Documents
MOQ, supply or production lead time, packing and delivery terms are confirmed with the quotation according to product form, dimensions, processing and order quantity.
For Faster Review
Send product form, dimensions, ASTM or ASME specification, material condition, inspection requirements and quantity with the RFQ.
625
UNS N06625 · Inspection & Supply
Define Your Alloy 625 Order Requirements
Send the material, inspection and documentation scope for quotation review.
Product
Size
Standard
Inspection
Documents
Quantity
Inconel 625 Engineering & Selection Tools
01
Service Fit Selector
Evaluate medium, temperature, and chloride conditions against Alloy 625 operational capabilities.
Run Selector02
RFQ Readiness Scorecard
Verify material grade, ASTM standard, critical dimension, and inspection documentation completeness.
Check Scorecard03
Standard Fit Matrix
Map requested product forms accurately to ASTM, AMS, and ASME specification constraints.
View Matrix
FAQ · Specification · Procurement
Alloy 625 FAQ & Procurement Questions
Quick answers covering Alloy 625 identification, product forms, standards, material condition, documentation and quotation requirements.
What is Alloy 625 / Inconel 625?
Alloy 625 is a nickel-chromium-molybdenum-niobium alloy identified as UNS N06625 and W.Nr. 2.4856.
What Alloy 625 product forms can be supplied?
Common supply forms include plate, sheet, strip, seamless and welded pipe or tube, round bar, rod, forgings and selected processed components.
Which ASTM specifications are commonly used for Alloy 625?
Common product specifications include ASTM B443, B444, B446, B564, B704 and B705, depending on the required product form.
What is the difference between Alloy 625 Grade 1 and Grade 2?
The grade designation is linked to the applicable product specification and heat-treatment condition. Grade 1 and Grade 2 requirements should therefore be checked against the specified ASTM or ASME standard. Grade 3 applies to relevant ASTM B446 rod and bar requirements.
Can Alloy 625 be supplied with EN 10204 3.1 documentation?
EN 10204 3.1 documentation can be specified where applicable and should be confirmed together with the material, inspection and order documentation scope.
What information is needed for an Alloy 625 quotation?
Send the product form, dimensions, specification, material condition, quantity, inspection requirements and delivery destination for quotation review.
Procurement Note
Availability, MOQ, processing route, lead time and documentation are confirmed according to the actual product form and order scope.
625
UNS N06625 · Final RFQ
Need Alloy 625 for Your Project?
Send your required product form, dimensions and specification for supply, inspection and quotation review.
Plate / Sheet
Pipe / Tube
Bar / Forging
Standard
Size
Condition
Inspection
Quantity
