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Nickel Alloy Grade Data Sheet

Inconel 625

Inconel 625 is commonly specified when standard stainless steels cannot provide enough resistance to chloride attack, oxidizing media, reducing media or high-temperature oxidation. The alloy is supplied in plate, sheet, bar, pipe, tube, wire, forging and flange forms for corrosion-resistant equipment, welded assemblies and machined components.

The data below can be used as a buyer-facing technical template. Chemical composition, physical properties, mechanical properties and standards can be replaced by grade, while the page structure remains consistent for WordPress calling.

 

 

 

 

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Material Overview

Inconel 625 material profile

A concise grade introduction for buyers who need to confirm composition, properties, standards, available forms and suitable applications before sending an inquiry.

Engineering profile

Inconel 625 is commonly specified when standard stainless steels cannot provide enough resistance to chloride attack, oxidizing media, reducing media or high-temperature oxidation. The alloy is supplied in plate, sheet, bar, pipe, tube, wire, forging and flange forms for corrosion-resistant equipment, welded assemblies and machined components.

The data below can be used as a buyer-facing technical template. Chemical composition, physical properties, mechanical properties and standards can be replaced by grade, while the page structure remains consistent for WordPress calling.

 

 

 

 

Inconel 625

Technical data on this page is for material selection reference. Final acceptance values should be confirmed by the purchase standard, heat treatment condition, product form, size and material test certificate.

Chemical Composition

Inconel 625 composition range

The following table shows common limiting composition values for Alloy 625 / UNS N06625. Actual product chemistry is reported by heat on the material test certificate.

Element Symbol Typical Requirement Role in Alloy 625
Nickel Ni 58.0 min Base element for chloride resistance and toughness.
Chromium Cr 20.0-23.0 Oxidation resistance and resistance to oxidizing media.
Molybdenum Mo 8.0-10.0 Improves resistance to pitting, crevice corrosion and reducing acids.
Niobium plus Tantalum Nb + Ta 3.15-4.15 Strengthens the matrix with molybdenum without age hardening.
Iron Fe 5.0 max Controlled residual / balancing element.
Carbon C 0.10 max Controlled for weldability and corrosion performance.
Manganese Mn 0.50 max Controlled minor element.
Silicon Si 0.50 max Controlled minor element.
Phosphorus P 0.015 max Controlled impurity.
Sulfur S 0.015 max Controlled impurity.
Aluminum Al 0.40 max Controlled minor element.
Titanium Ti 0.40 max Controlled minor element.
Cobalt Co 1.0 max, if determined Controlled residual element when specified.

 

 

 

Physical Properties

Key physical and thermal data

These values help customers compare density, thermal behavior, magnetic response and conductivity during early material selection.

Property Metric Value Imperial / Notes Condition
Density 8.44 g/cm3 0.305 lb/in3 Room temperature
Melting Range 1290-1350 °C 2350-2460 °F Typical range
Specific Heat 410 J/kg·°C 0.098 Btu/lb·°F Approx. 21 °C
Thermal Conductivity 9.8 W/m·°C 68 Btu·in/ft2·h·°F Approx. 21 °C
Electrical Resistivity 129 µΩ·cm 776 ohm-cmil/ft Approx. 21 °C
Modulus of Elasticity Approx. 207 GPa Approx. 30.1 x 103 ksi Annealed, room temperature
Magnetic Permeability Approx. 1.0006 Essentially non-magnetic At 200 Oe reference

 

 

 

Mechanical Properties

Room-temperature mechanical properties

Mechanical properties vary with product form, size, processing route and heat treatment. The table below summarizes commonly referenced nominal values for material selection.

Product Form / Condition Tensile Strength Yield Strength, 0.2% Elongation Hardness
Rod, bar, plate – as-rolled 827-1103 MPa 414-758 MPa 30-60% 175-240 HB
Rod, bar, plate – annealed 827-1034 MPa 414-655 MPa 30-60% 145-220 HB
Rod, bar, plate – solution treated 724-896 MPa 290-414 MPa 40-65% 116-194 HB
Sheet and strip – annealed 827-1034 MPa 414-621 MPa 30-55% 145-240 HB
Cold-drawn tube / pipe – annealed 827-965 MPa 414-517 MPa 30-55% By specification
Cold-drawn tube / pipe – solution treated 689-827 MPa 276-414 MPa 40-60% By specification

 

 

 

For pressure equipment, aerospace parts or project-specific acceptance, use the minimum requirements in the specified ASTM, ASME, AMS, EN or customer drawing rather than nominal values.

Standards & Specifications

Common Inconel 625 standards by product form

YSN128 can quote Alloy 625 products according to ASTM, ASME, AMS, EN, DIN, ISO or customer drawing requirements. Certificate scope can be matched to the purchase order.

Product Form Common Standards Typical Supply Item Certificate / Inspection
Plate, Sheet, Strip ASTM B443 / ASME SB443, AMS 5599, AMS 5869, EN 10095 Hot rolled plate, cold rolled sheet, strip and cut blanks EN10204 3.1, chemical and mechanical test
Rod, Bar, Wire ASTM B446 / ASME SB446, AMS 5666, AMS 5837, ISO 9723, ISO 9724 Round bar, forged bar, wire and wire rod MTC, PMI, dimensional inspection
Forgings ASTM B564 / ASME SB564, AMS 5666, ISO 9725 Forging stock, rings, discs, blocks and custom forgings UT, heat treatment record, MTC
Seamless Pipe & Tube ASTM B444 / B829, ASME SB444 / SB829, AMS 5581, ISO 6207 Seamless pipe, seamless tube, capillary tube Hydrotest, UT / ET when required
Welded Tube ASTM B704 / B751, ASME SB704 / SB751 Welded tube for corrosion or heat service Weld inspection, pressure test, MTC
Welded Pipe ASTM B705 / B775, ASME SB705 / SB775 Welded pipe and large-diameter pipe Dimensional, visual, pressure test
Fittings ASTM B366 / ASME SB366 Elbow, tee, reducer, cap and special fittings Heat traceability, PMI, MTC

 

 

 

Available Product Forms

Inconel 625 supply range

Review available product forms, size ranges, standards and delivery options for this alloy.

Form Common Size Range Delivery Condition Typical Applications Page Link
Pipe & Tube OD 6-610 mm, wall thickness 0.5-50 mm; larger welded sizes on request Seamless or welded, solution annealed, pickled or bright annealed Oil and gas pipelines, seawater systems, chemical processing and exhaust applications View Pipe & Tube
Round Bar Diameter 3-350 mm, custom cut lengths and larger forged sizes on request Hot rolled, forged, solution annealed, peeled, ground or polished Valves, pumps, shafts, fasteners and high-strength corrosion-resistant components View Round Bar
Sheet & Plate Thickness 0.5-100 mm, custom widths, lengths and cut profiles available Hot or cold rolled, solution annealed, pickled, polished or descaled Pressure vessels, chemical tanks, marine structures and aerospace components View Sheet & Plate
Strip & Foil Thickness 0.02-3 mm, custom slit widths, coil weights and tolerances available Cold rolled, solution annealed, bright finished, slit edge or mill edge Gaskets, bellows, corrosion-resistant seals and aerospace heat-resistant parts View Strip & Foil
Wire Diameter 0.1-12 mm, supplied in coil, spool or straight length Cold drawn, solution annealed, bright finished, pickled or polished Wire mesh, springs, safety components and corrosion-resistant fabricated parts View Wire
Fasteners M3-M64 and equivalent imperial sizes; non-standard dimensions to drawing Solution annealed, machined or cold formed, rolled or cut thread Marine equipment, chemical-processing plants, heat exchangers and offshore structures View Fasteners
Fittings NPS 1/2-24 in.; larger fabricated fittings and custom dimensions on request Seamless, welded or fabricated, solution annealed, pickled and machined Chemical piping, seawater handling, pollution-control systems and process equipment View Fittings
Flanges NPS 1/2-24 in., Class 150-2500; larger or drawing-based sizes on request Forged or plate machined, solution annealed, finished machined and inspected Corrosive-service piping, offshore platforms, chemical plants and pressure systems View Flanges
Forgings Rings, discs, blocks and shafts manufactured to drawing; size subject to mill capability Open-die or closed-die forged, solution annealed, rough or finish machined Pressure-vessel parts, turbine components, offshore equipment and heavy-duty shafts View Forgings
Welding Wire Diameter 0.8-4 mm, supplied on spool, in coil or as straight TIG rods Precision drawn, clean bright finish and controlled surface condition Joining Inconel 625, nickel alloys, stainless steels and corrosion-resistant overlays View Welding Wire

 

 

Material Selection Guide

When to consider Inconel 625

This guide helps buyers connect service conditions with the typical advantage of Alloy 625. Final selection should consider medium concentration, temperature, pressure, fabrication, availability and budget.

Service Requirement Why Alloy 625 Helps Common Product Form Buyer Note
Chloride pitting / crevice corrosion High Ni-Cr-Mo content supports localized corrosion resistance. Plate, sheet, pipe, tube, fittings Confirm temperature, chloride level and cleaning practice.
Seawater exposure Good resistance to seawater corrosion and corrosion fatigue. Pipe, tube, fastener bar, forgings Check galvanic coupling and stagnant seawater conditions.
Hot gas and oxidation Chromium supports oxidation resistance at elevated temperatures. Sheet, plate, fabricated assemblies Confirm cyclic temperature and sulfur or carburizing media.
Welded fabrication Good weldability with matching filler metals and no age-hardening requirement. Plate, sheet, tube, pipe Control heat input, cleanliness and post-weld inspection.
Strength plus corrosion Mo-Nb strengthening gives useful strength while retaining corrosion resistance. Bar, forging, plate, tube Specify mechanical minimums and heat treatment condition.

 

 

 

Why Choose Us

Supply and quality support for Inconel 625

For ranking traffic, buyers need more than a data sheet. This section gives clear trust signals for procurement, engineering and quality teams.

STASTM / ASME / AMS / EN

Quotation can be matched to project standards and product form specifications.

MTEN10204 3.1 MTC

Heat number, chemistry, mechanical properties and inspection records can be supplied.

QCPMI & Inspection

PMI, UT, dimensional inspection, visual inspection and packing check are available.

CSCustom Size

Cutting, machining allowance, rough machining and drawing-based supply can be arranged.

EPExport Packing

Wooden case, bundle, waterproof protection and international shipping documents.

RFFast Technical Reply

Send grade, size, standard, quantity and destination for a practical quotation route.

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FAQ

Inconel 625 questions from buyers

Find practical answers about procurement, standards, fabrication and industrial applications.

It is used for marine systems, chemical processing equipment, aerospace ducts and tubing, oil and gas parts, pollution control equipment, heat exchangers, valves, fasteners and pressure-related assemblies where corrosion resistance and strength are both required.

UNS N06625 is the UNS designation for Alloy 625. Inconel 625 is a widely used trade name. Purchase orders may also reference Alloy 625, Nickel Alloy 625, W.Nr. 2.4856 or NiCr22Mo9Nb depending on the standard system.

YSN128 can quote plate, sheet, strip, round bar, forged bar, wire, seamless pipe, welded pipe, tube, forgings, flanges and fittings. Custom cutting and machining allowance can be discussed by drawing or size list.

Common standards include ASTM B443 for plate, sheet and strip, ASTM B446 for rod and bar, ASTM B444 for seamless pipe and tube, ASTM B704 / B705 for welded tube and pipe, ASTM B564 for forgings, ASTM B366 for fittings, plus AMS 5599, AMS 5666 and related ASME standards.

Yes. Alloy 625 is known for good weldability when proper nickel alloy welding procedures, clean surfaces, controlled heat input and suitable filler metals are used. Welding requirements should be confirmed by the project code or customer specification.

Yes. Material can be supplied with EN10204 3.1 MTC when requested. Additional PMI, UT, dimensional inspection, visual inspection, packing photos or third-party inspection can be arranged according to the order.

Please send grade or UNS number, product form, size, quantity, standard, delivery condition, certificate requirements, destination and application environment. If you have a drawing, send the drawing together with tolerance and inspection requirements.

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