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Inconel 625 Bar and Rod
Round, square, hex, flat, and forged sections to ASTM B446 in Grade 1 and Grade 2 conditions.
View Inconel 625 Bar and Rod →Inconel 625 — UNS N06625 Alloy Data & Forms
Grade hub for UNS N06625 / Werkstoff 2.4856 — composition, standards, and supply of bar, pipe and tube, and plate.
One Grade, Every Form
Bar, pipe, tube, and plate specifications are coordinated from a single Inconel 625 material page.
Verified Mill Partners
Melting, annealing, and finishing sit with qualified plants working to the standard you name.
Audit-Ready Documentation
EN 10204 3.1 mill test certificates with heat-number traceability accompany every delivery.
MATERIAL OVERVIEW
About Inconel 625
Inconel 625 is supplied in UNS N06625 / Werkstoff 2.4856, a nickel-chromium-molybdenum-niobium alloy hardened by solid-solution strengthening. Molybdenum and niobium hold strength without aging while chromium resists hot-gas oxidation. Supply spans bar, pipe and tube, and plate across the ASTM family.
This page consolidates the grade data buyers check before ordering — composition, standards, and mechanical minimums by product form. Formed product is specified in detail on the Inconel 625 Bar and Rod, Inconel 625 Pipe and Tube, and Inconel 625 Plate and Sheet pages.
KEY FEATURES
Key Features of Inconel 625
Inconel 625 is a solid-solution-strengthened nickel-chromium-molybdenum-niobium grade covering bar, pipe and tube, and plate under the ASTM B446, B444, B705, B704, and B443 family. The chemistry resists pitting, crevice corrosion, and chloride stress-corrosion cracking from cryogenic temperatures to about 980 °C. This page consolidates composition, standards, and mechanical minimums for UNS N06625, with Grade 1 and Grade 2 conditions mapped to strength-led and creep-led service.
Inconel 625
Chloride Pitting Resistance
Chromium, molybdenum, and niobium together hold high resistance to localized attack in seawater and acidic chlorides.
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Strength Without Aging
Solid-solution hardening removes precipitation heat treatment from the production route entirely.
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Cryogenic Through 980 °C Service
Useful mechanical properties run from deep-cold equipment to high-temperature oxidation duty.
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Grade 1 and Grade 2 Conditions
Annealed and solution-annealed deliveries map cleanly to strength-led or creep-led applications.
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Welding Without Preheat
Fabrication proceeds without preheat and generally without post-weld heat treatment.
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Fatigue and Thermal-Cycling Strength
Niobium-supported strength holds up under cyclic loading and repeated thermal exposure.
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Traceable Across Forms
Heat-number documentation links every bar, pipe, and plate delivery back to its melting heat.
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WHY CHOOSE US
Why Choose Inconel 625
Inconel 625 is a solid-solution-strengthened nickel-chromium-molybdenum-niobium grade covering bar, pipe and tube, and plate under the ASTM B446, B444, B705, B704, and B443 family. The chemistry resists pitting, crevice corrosion, and chloride stress-corrosion cracking from cryogenic temperatures to about 980 °C. This page consolidates composition, standards, and mechanical minimums for UNS N06625, with Grade 1 and Grade 2 conditions mapped to strength-led and creep-led service.
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Direct Factory Supply
Mill-direct nickel alloy materials with full material traceability on every order.
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Certified Quality Systems
Quality management under ISO 9001, with EN 10204 3.1 mill test certificates on delivery.
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Custom Manufacturing
Dimensions, tolerances, finish and packaging produced to your drawings and specifications.
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Global Export Service
Responsive technical communication with complete export documentation and reliable lead times.
PRODUCT FORMS
Available Product Forms
Inconel 625 supply is organized by product form. Each form carries its own ASTM specification and its own page where a form line is established.
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Inconel 625 Pipe and Tube
Seamless pipe and tube to ASTM B444, welded pipe to ASTM B705, and welded tube to ASTM B704.
View Inconel 625 Pipe and Tube →
03
Inconel 625 Plate and Sheet
Hot-rolled and cold-rolled plate, sheet, and strip to ASTM B443 in both grades.
View Inconel 625 Plate and Sheet →
APPLICATIONS
Engineered For Demanding Industries
The grade appears wherever seawater, aggressive chemical media, and high-temperature oxidation arrive together with mechanical load. Form selection usually follows the pressure, thickness, and fabrication route each project requires.
Discuss Your Application →
01
Oil and Gas Downhole
Sour-service tubing and components qualified against NACE MR0175 requirements.
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Seawater Piping Systems
Firewater, ballast, and cooling lines where chloride pitting defeats lesser alloys.
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Chemical Processing Equipment
Reactor internals, heat-exchanger tubing, and valve trim in oxidizing and reducing acids.
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Aerospace Ducting and Exhausts
Engine and airframe components that keep their strength near 980 °C.
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Flue Gas Desulfurization
Scrubber ductwork and internals running in wet, chloride-laden flue gas.
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Nuclear Plant Components
Steam-generator and reactor hardware exposed to high-temperature water.
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Heat-Treatment Fixtures
Furnace muffles, rolls, and fixtures under repeated thermal cycling.
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Marine Fasteners and Shafts
Machined components standing up to crevice attack in stagnant seawater.
TECHNICAL INFORMATION
Technical Specifications
Detailed technical information including chemical composition, mechanical properties, standards and available dimensions.
Chemical Composition
Limits below apply across the ASTM form family for UNS N06625. The governing purchase specification always takes precedence for final acceptance.
| Element | Content |
|---|---|
| Nickel (Ni) | Balance |
| Chromium (Cr) | 20.0–23.0% |
| Molybdenum (Mo) | 8.0–10.0% |
| Niobium + Tantalum (Nb + Ta) | 3.15–4.15% |
| Iron (Fe) | 5.00% max. |
| Cobalt (Co) | 1.00% max. |
| Carbon (C) | 0.10% max. |
| Manganese (Mn) | 0.50% max. |
| Silicon (Si) | 0.50% max. |
| Phosphorus (P) | 0.015% max. |
| Sulfur (S) | 0.015% max. |
| Aluminum (Al) | 0.40% max. |
| Titanium (Ti) | 0.40% max. |
Mechanical Properties
Minimum room-temperature values are grouped by product form and heat-treated grade. Grade 1 is annealed at 871 °C (1600 °F) minimum for strength-led duty. Grade 2 is solution annealed at 1093 °C (2000 °F) minimum for creep-led service.
| Product Form | Standard | Condition / Grade | Tensile Strength | Yield Strength, 0.2% Offset | Elongation |
|---|---|---|---|---|---|
| Bar and rod, up to 101.6 mm (4 in.) dia. | ASTM B446 | Grade 1 | ≥827 MPa (120 ksi) | ≥414 MPa (60 ksi) | ≥30% |
| Bar and rod, over 101.6 to 254 mm dia. | ASTM B446 | Grade 1 | ≥758 MPa (110 ksi) | ≥345 MPa (50 ksi) | ≥25% |
| Bar and rod, all sizes | ASTM B446 | Grade 2 | ≥690 MPa (100 ksi) | ≥276 MPa (40 ksi) | ≥30% |
| Seamless pipe and tube | ASTM B444 | Grade 1 | ≥827 MPa (120 ksi) | ≥414 MPa (60 ksi) | ≥30% |
| Seamless pipe and tube | ASTM B444 | Grade 2 | ≥690 MPa (100 ksi) | ≥276 MPa (40 ksi) | ≥30% |
| Welded pipe | ASTM B705 | Grade 1 | ≥827 MPa (120 ksi) | ≥414 MPa (60 ksi) | ≥30% |
| Welded pipe | ASTM B705 | Grade 2 | ≥690 MPa (100 ksi) | ≥276 MPa (40 ksi) | ≥30% |
| Welded tube | ASTM B704 | Grade 1 | ≥827 MPa (120 ksi) | ≥414 MPa (60 ksi) | ≥30% |
| Welded tube | ASTM B704 | Grade 2 | ≥690 MPa (100 ksi) | ≥276 MPa (40 ksi) | ≥30% |
| Cold-rolled sheet and strip | ASTM B443 | Grade 1 | ≥827 MPa (120 ksi) | ≥414 MPa (60 ksi) | ≥30% |
| Hot-rolled sheet and plate up to 70 mm | ASTM B443 | Grade 1 | ≥758 MPa (110 ksi) | ≥379 MPa (55 ksi) | ≥30% |
| Plate, sheet, and strip | ASTM B443 | Grade 2 | ≥690 MPa (100 ksi) | ≥276 MPa (40 ksi) | ≥30% |
A stabilization anneal at 982 °C (1800 °F) minimum may follow Grade 2 solution annealing where sensitization resistance is specified. Size and product conditions within each standard govern final acceptance.
Physical Properties
| Property | Value |
|---|---|
| Alloy | Inconel 625 |
| UNS | N06625 |
| Werkstoff | 2.4856 |
| Density | Approx. 8.44 g/cm³ |
| Melting Range | Approx. 1290–1350°C |
| Elastic Modulus | Approx. 205 GPa (annealed) |
| Thermal Conductivity | Approx. 9.8 W/m·°C at 20 °C |
| Specific Heat | Approx. 410 J/kg·°C |
| Expansion Coefficient | 12.8 µm/m·°C (20–100 °C) |
| Alloy Type | Nickel-chromium-molybdenum |
| Strengthening | Solid-solution (Mo, Nb) |
Standards
| Standard | Product / Application |
|---|---|
| ASTM B446 | Bar and rod (Grade 1 / Grade 2) |
| ASTM B444 | Seamless pipe and tube |
| ASTM B705 | Welded pipe |
| ASTM B704 | Welded tube |
| ASTM B443 | Plate, sheet, and strip |
| ASTM B366 | Wrought fittings for the grade |
| ASTM B564 | Forgings — flanges, rings, and valves |
| ASME SB446 / SB444 / SB705 / SB704 / SB443 | Counterparts for pressure-code jurisdiction |
| SAE AMS 5666 | Bar, forgings, and rings (annealed) |
| SAE AMS 5581 | Seamless tube and hydraulic tubing |
| SAE AMS 5599 | Sheet, strip, and plate |
| DIN 17752 / 17751 | European bar and pipe standards, W.Nr. 2.4856 |
| ISO 9723 / 9724 | Nickel alloy bar and rod |
| NACE MR0175 / ISO 15156 | Sour-service qualification (cited for reference) |
| VdTÜV 499 | Pressure equipment approval (Europe) |
Specifications are published by ASTM International, and the ASME counterparts apply wherever boiler and pressure-code compliance is required. NACE MR0175 / ISO 15156 qualification should be confirmed against the current edition for sour-service projects.
Dimensions
| Product Form | Typical Supply Range |
|---|---|
| Bar and rod | 3–500 mm dia. by section and condition |
| Seamless pipe | OD 6–219 mm, SCH 5 to SCH 80 and custom wall |
| Welded pipe | OD up to 1219 mm, SCH 5 to SCH XXS |
| Welded tube | OD 6–50 mm for heat-exchanger duty, custom wall |
| Plate and sheet | 0.5–100 mm thick, cut to length and width |
Surface Finishes
| Surface Condition | Typical Characteristics / Applications |
|---|---|
| Annealed & Pickled | Standard condition for pipe, tube, and hot-rolled plate |
| Bright / Ground | Machined or ground finish on bar and precision components |
| Polished | Reduced roughness where flow or appearance demands it |
| As-Worked | Hot-worked or cold-worked surface for further fabrication |
Available dimensions depend on the standard, manufacturing route, and order quantity. Confirm diameter, wall or thickness, and length in the inquiry so the correct route is quoted.
TECHNICAL DOCUMENTATION
Download Technical Datasheet
Get detailed information including specifications, standards, dimensions and material properties.
FAQ
Frequently Asked Questions
Which ASTM specification covers each Inconel 625 product form?
ASTM B446 covers bar and rod, B444 seamless pipe and tube, B705 welded pipe, B704 welded tube, and B443 plate, sheet, and strip. ASME counterparts apply under pressure-code jurisdiction.
How do Grade 1 and Grade 2 Inconel 625 differ?
Grade 1 is annealed at 871 °C (1600 °F) minimum and carries the higher room-temperature minimums. Grade 2 is solution annealed at 1093 °C (2000 °F) minimum and serves creep-limited duty above about 593 °C.
Which welding filler is used for Inconel 625?
ERNiCrMo-3 filler to AWS A5.14 is standard for GTAW and GMAW, with ENiCrMo-3 covered electrodes for SMAW. Fabrication normally proceeds without preheat or post-weld heat treatment.
What are the equivalent designations for Inconel 625?
UNS N06625, W.Nr. 2.4856, and BS NA21 all designate the grade. Alloy 625, Chornin 625, and Nickelvac 625 are common trade names for the same chemistry.
Does Inconel 625 resist seawater corrosion?
Resistance to pitting, crevice attack, and chloride stress-corrosion cracking makes the grade a default selection for seawater piping, fasteners, and sour-service equipment.
What is your MOQ for Inconel 625?
Single-piece orders are available in common sizes across every product form.
What are your trade terms for Inconel 625?
Quotations are issued FOB as standard, with EXW, CIF, and DAP available against confirmed destinations.
What is the lead time for Inconel 625?
Mill production for standard sizes runs 7-15 days, with custom sections quoted against the confirmed schedule.
Do you provide EN 10204 3.1 or 3.2 certificates?
Yes — 3.1 mill test certificates are standard on every delivery, and 3.2 certificates with third-party endorsement can be arranged on request.
REQUEST FOR QUOTATION
Need A Custom Alloy Solution?
Send the grade, product form, standard, size, and quantity, and the quotation returns with Incoterm, lead time, and documentation scope. Grade-condition questions can be attached to the same inquiry for engineering review.
