Home > Alloys > Nimonic > Nimonic 90

Nickel Alloy Grade Data Sheet

Nimonic 90

Nimonic 90 is commonly specified for components requiring high tensile strength, creep resistance and stress-rupture performance at elevated temperatures. This wrought, age-hardenable nickel-chromium-cobalt alloy is strengthened by controlled additions of titanium and aluminum and is designed for service at temperatures up to approximately 920 °C. Typical applications include gas-turbine blades, discs, rings, hot-working tools, high-temperature fasteners, springs and other heavily loaded hot-section components.

 

 

Download Nimonic 90 Datasheet Send Inquiry
Material Overview

Nimonic 90 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

Nimonic 90 is commonly specified for components requiring high tensile strength, creep resistance and stress-rupture performance at elevated temperatures. This wrought, age-hardenable nickel-chromium-cobalt alloy is strengthened by controlled additions of titanium and aluminum and is designed for service at temperatures up to approximately 920 °C. Typical applications include gas-turbine blades, discs, rings, hot-working tools, high-temperature fasteners, springs and other heavily loaded hot-section components.

 

 

Nimonic 90

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

Nimonic 90 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 Nimonic 90
Nickel Ni Balance Base element providing structural stability, ductility and corrosion resistance.
Chromium Cr 18.0-21.0 Provides resistance to oxidation and high-temperature corrosion.
Cobalt Co 15.0-21.0 Supports solid-solution strength and elevated-temperature structural stability.
Titanium Ti 2.0-3.0 Combines with aluminum to form the strengthening gamma-prime phase.
Aluminum Al 1.0-2.0 Promotes precipitation hardening and supports oxidation resistance.
Carbon C 0.13 max Contributes to carbide formation and grain-boundary strength.
Iron Fe 1.5 max Controlled residual element in the nickel-chromium-cobalt matrix.
Manganese Mn 1.0 max Controlled minor element used during alloy production.
Silicon Si 1.0 max Controlled minor element affecting processing and oxidation behavior.
Copper Cu 0.20 max Controlled residual element.
Zirconium Zr 0.15 max Controlled minor addition supporting grain-boundary performance.
Boron B 0.020 max Minor addition supporting grain-boundary strength and creep resistance.
Sulfur S 0.015 max Controlled impurity for hot-workability and mechanical performance.

 

 

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 8.18 g/cm3 0.296 lb/in3 Room temperature
Melting Range 1310-1370 °C 2390-2498 °F Solidus to liquidus
Specific Heat 446 J/kg·°C Approx. 0.107 Btu/lb·°F At 20 °C
Thermal Conductivity 11.47 W/m·°C 80.46 Btu·in/ft2·h·°F At 20 °C, fully heat treated
Electrical Resistivity 1.18 µΩ·m 710 ohm-cmil/ft At 20 °C
Dynamic Modulus of Elasticity Approx. 220 GPa Approx. 32.0 x 103 ksi Cold-rolled sheet at 20 °C
Mean Thermal Expansion Approx. 12.8 x 10-6/°C Approx. 7.1 x 10-6/°F Between 20 and 100 °C, fully heat treated

 

 

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 / Notes
Extruded bar – solution treated and aged Approx. 1175 MPa Approx. 752 MPa Approx. 30% Representative room-temperature average
Forged bar – solution treated and aged Approx. 1150-1250 MPa Approx. 750-850 MPa 20-30% Section size and forging process dependent
Cold-rolled section – heat treated Approx. 1265 MPa Approx. 831 MPa Approx. 30% Representative room-temperature average
Cold-rolled sheet – heat treated Approx. 1180 MPa Approx. 831 MPa Approx. 23% Based on sheet approximately 0.6-2.0 mm thick
Cold-rolled sheet – solution treated Approx. 865 MPa Approx. 461 MPa Approx. 50% Approx. 243 HV; suitable condition for forming
Wire, pipe and tube – heat treated By applicable specification By specification By specification Final properties depend on dimensions, cold work and heat treatment

 

 

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 Nimonic 90 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 BS HR 202, AECMA PrEN 2298 or customer specification Cold rolled sheet, strip, plate and cut blanks EN 10204 3.1, chemical, mechanical and heat-treatment records
Rod, Bar, Wire BS HR 2, BS HR 501 / 502 / 503, SAE AMS 5829, AECMA PrEN 2295 / 2296 / 2297 / 2400 / 2401 / 2669 / 2670 Round bar, flat bar, rod, wire and forging stock MTC, PMI, mechanical test and dimensional inspection
Pipe & Tube BS HR 402, AECMA PrEN 2299 or approved customer specification Seamless tube, welded tube and drawing-based tubular parts Hydrotest, eddy current test, dimensional inspection and MTC
Forgings BS HR 2, BS HR 501 / 502 / 503 or customer-approved aerospace specification Rings, discs, blocks, shafts and turbine forgings Heat-treatment record, UT, mechanical test, PMI and MTC
Machined Fittings & Flanges Applicable dimensional standard plus approved N07090 raw-material specification Flanges, rings, fittings and special machined components Dimensional inspection, PMI, NDT and MTC
General Designations UNS N07090, W.Nr. 2.4632, NiCr20Co18Ti Material identification and cross-reference requirements Specification comparison and purchaser approval may be required

 

 

Available Product Forms

Nimonic 90 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 6-406 mm, wall thickness or schedule to specification; larger fabricated sizes subject to review Seamless, welded or fabricated, solution treated and aged as specified Hot-gas systems, turbine equipment and high-temperature tubular assemblies View Pipe & Tube
Round Bar Diameter 3-300 mm, custom cut lengths and larger forged sections available Hot rolled, extruded, forged, solution treated, aged, peeled or ground Turbine components, high-temperature fasteners, shafts and hot-working tools View Round Bar
Sheet & Plate Thickness 0.5-80 mm, custom widths, lengths and cut profiles Cold rolled, hot rolled, solution treated, aged, pickled or polished Gas-turbine fabrications, heat shields and high-temperature structural components View Sheet & Plate
Strip & Foil Thickness 0.02-3 mm, slit widths and coil weights to specification Cold rolled, solution treated, aged or spring temper High-temperature springs, seals, clips, diaphragms and retaining components View Strip & Foil
Wire Diameter 0.1-15 mm, supplied in coils, spools or straight lengths Cold drawn, solution treated, aged, bright or pickled High-temperature springs, fasteners, retaining parts and formed wire components View Wire
Fasteners Standard and custom bolts, nuts, screws, studs, pins and washers Hot forged, cold formed or machined, solution treated and aged Gas turbines, power-generation equipment and high-temperature loaded joints View Fasteners
Fittings ASME, EN and drawing-based dimensions, including custom heavy-wall components Machined, formed or welded, with project-specified heat treatment Hot-gas piping, turbine systems and high-temperature industrial equipment View Fittings
Flanges ASME B16.5, ASME B16.47, EN and custom drawing dimensions Forged, solution treated, aged, machined and inspected Hot-gas systems, turbine equipment and high-temperature process connections View Flanges
Forgings Rings, discs, blocks, shafts and custom forgings up to mill capability Forged, solution treated and aged, rough machined or finish machined Turbine blades, discs, rings, hot-working tools and heavily loaded hot-section parts View Forgings
Welding Wire Diameter 0.8-4.0 mm, supplied in spool, coil or straight length Clean bright finish, precision drawn and chemistry controlled Qualified fabrication and repair welding of Nimonic 90 assemblies View Welding Wire

 

 

Material Selection Guide

When to consider Nimonic 90

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 Nimonic 90 Helps Common Product Form Buyer Note
High-temperature creep resistance Gamma-prime precipitation strengthening and cobalt provide high creep and stress-rupture strength. Bar, forgings, discs, rings and fasteners Provide operating stress, temperature, required life and thermal-cycle information.
Gas-turbine blades and discs Retains useful tensile and rupture strength under heavily loaded elevated-temperature service. Forgings, bar, blades, rings and discs Confirm the applicable aerospace specification, grain-flow and NDT requirements.
High-temperature springs Combines age-hardened strength with fatigue resistance and thermal stability. Wire, strip and formed spring components Specify spring load, cycle count, operating temperature and final temper.
High-temperature bolting Provides high tensile strength and improved resistance to creep relaxation. Bar, wire, bolts, studs and nuts Specify thread method, proof load, heat treatment and service temperature.
Hot-working tools Maintains strength and hardness during repeated exposure to elevated temperatures. Forgings, blocks, bar and machined tooling Confirm impact load, contact temperature and cooling cycle.
Welded high-temperature assemblies Thin sections can be joined using qualified resistance, TIG or MIG procedures. Sheet, strip, tube and welding wire Sections above approximately 5 mm require careful process selection due to microfissuring risk.

 

 

Why Choose Us

Supply and quality support for Nimonic 90

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.

Related Nickel Alloys

Compare nearby grades and product forms

Explore related grades and product forms for comparison.

FAQ

Nimonic 90 questions from buyers

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

Nimonic 90 is mainly used for gas-turbine blades, discs and rings, high-temperature fasteners, springs, hot-working tools and other heavily loaded components requiring creep and stress-rupture strength at elevated temperatures.

Yes. UNS N07090 is the standardized UNS designation for Nimonic 90. The alloy may also be identified as Alloy 90, W.Nr. 2.4632 or NiCr20Co18Ti.

Nimonic 90 contains approximately 15-21% cobalt together with higher controlled titanium content. It is designed for greater creep and stress-rupture strength at higher temperatures, while Nimonic 80A is commonly selected for high-temperature bolts, valves and turbine components operating at somewhat lower temperatures.

YSN128 can quote plate, sheet, strip, round bar, flat bar, rod, wire, pipe, tube, forging stock, rings, discs, fasteners, flanges and drawing-based machined components.

Common standards include BS HR 2 and BS HR 501, HR 502 and HR 503 for bar, wire and forging stock; SAE AMS 5829 for wire; BS HR 202 for plate and sheet; and BS HR 402 for pipe and tube.

The exact heat treatment depends on the product form. A commonly referenced treatment for bar is 8 hours at 1080 °C followed by air cooling, then 16 hours at 700 °C followed by air cooling. Sheet normally uses a separate solution, intermediate and aging treatment.

Yes. Resistance welding and carefully controlled TIG or MIG welding are suitable for thin sections up to approximately 5 mm. Thicker sections have a greater risk of weld-metal and heat-affected-zone microfissuring, so electron-beam, friction, inertia or flash-butt welding may be considered. Post-weld heat treatment is normally required for optimum properties.

Please send the grade or UNS number, product form, dimensions, quantity, applicable standard, required heat treatment, mechanical-property requirements, certificate requirements, destination and service temperature. Drawings, grain-flow requirements and inspection requirements are also welcome.

Request Nimonic 90 Quote

Need Nimonic 90 price, stock or technical support?

Send your required grade, product form, size, quantity, standard, certificate and destination. We will help check availability, production route, inspection scope and practical delivery plan.

Email RFQ

Home Tel Mail Inquiry