Name: Incoloy 800
Brand: Incoloy

Material Overview

Incoloy 800 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

Incoloy 800, designated UNS N08800, is an austenitic nickel-iron-chromium alloy combining corrosion resistance, heat resistance, strength and metallurgical stability. Its nickel content helps resist chloride-ion stress-corrosion cracking, chromium provides resistance to oxidation and other high-temperature attack, and iron improves resistance to internal oxidation. The alloy is readily formed, welded and machined and is commonly supplied for heat-treatment baskets and fixtures, heat exchangers, process piping, steam-generator tubing, electric-heating-element sheathing, pulp-processing heaters and petrochemical equipment.

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

Incoloy 800 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	Composition, wt.%	Role in Incoloy 800
Nickel	Ni	30.0-35.0	Maintains a ductile austenitic structure and improves resistance to chloride-ion stress-corrosion cracking.
Chromium	Cr	19.0-23.0	Provides resistance to oxidation and many aqueous and high-temperature corrosive environments.
Iron	Fe	39.5 min	Forms the principal balance and improves resistance to internal oxidation.
Carbon	C	0.10 max	Controlled for mechanical properties, processing and resistance to sensitization.
Aluminum	Al	0.15-0.60	Supports oxidation resistance and metallurgical stability at elevated temperatures.
Titanium	Ti	0.15-0.60	Contributes to alloy stability and elevated-temperature performance.
Manganese	Mn	1.50 max	Controlled minor alloying and deoxidizing element.
Silicon	Si	1.00 max	Controlled for processing, weldability and scale behavior.
Copper	Cu	0.75 max	Controlled residual element.
Sulfur	S	0.015 max	Restricted to support hot workability and weld quality.

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 Value	Condition / Notes
Density	7.94 g/cm3	0.287 lb/in3	Room temperature
Melting Range	1357-1385 °C	2475-2525 °F	Typical range
Specific Heat	460 J/kg·°C	0.11 Btu/lb·°F	Mean value from 0 to 100 °C
Thermal Conductivity	11.5 W/m·°C	Approx. 80 Btu·in/ft²·h·°F	Approx. 20 °C
Electrical Resistivity	0.989 µΩ·m	Approx. 595 ohm-cmil/ft	Approx. 20 °C
Modulus of Elasticity	196.5 GPa	28.5 x 10³ ksi	Approx. 20 °C, dynamic method
Shear Modulus	73.4 GPa	10.64 x 10³ ksi	Approx. 20 °C
Mean Coefficient of Thermal Expansion	14.4 µm/m·°C	Approx. 8.0 x 10^-6 in/in·°F	Mean value from approximately 20 to 100 °C
Magnetic Permeability	Approx. 1.014	Essentially non-magnetic	Annealed material at room temperature

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	Technical Note
Annealed wrought products	520 MPa (75 ksi) min	205 MPa (30 ksi) min	30% min	Common room-temperature specification minimums; verify the applicable product standard and dimensions.
Representative annealed rod at 25 °C	Approx. 590 MPa (85.5 ksi)	Approx. 250 MPa (36.2 ksi)	Product dependent	Typical test data for annealed material, not guaranteed acceptance values.
Representative hot-rolled rod at 25 °C	Approx. 665 MPa (96.4 ksi)	Approx. 445 MPa (64.6 ksi)	Product dependent	Typical properties vary with hot-working history, section size and final condition.
Representative annealed rod at 540 °C	Approx. 508 MPa (73.7 ksi)	Approx. 178 MPa (25.8 ksi)	Product dependent	Typical short-time elevated-temperature data, not a design allowable stress.
Representative annealed rod at 650 °C	Approx. 405 MPa (58.7 ksi)	Approx. 176 MPa (25.5 ksi)	Product dependent	For long-duration creep-controlled service, evaluate Alloy 800H or 800HT.
Cold-worked products	Higher than annealed condition	Higher than annealed condition	Lower than annealed condition	Final properties depend on reduction, dimensions and any subsequent heat treatment.

Values shown are representative or common specification minimums. Final acceptance depends on the product specification, dimensions, delivery condition, heat treatment, test orientation and material test certificate. Elevated-temperature design must use allowable stresses from the applicable construction code rather than these typical tensile values.

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 Incoloy 800 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 and Strip	ASTM B409 / ASME SB409, ASTM A240 / ASME SA240, ASTM B906 / ASME SB906, AMS 5871	Hot-rolled plate, cold-rolled sheet, strip and cut blanks	EN 10204 3.1 MTC, chemistry, tensile testing and dimensional inspection
Rod and Bar	ASTM B408 / ASME SB408, AMS 5766, ISO 9723	Round bar, rod, flat bar, hexagon and machined blanks	MTC, PMI, tensile testing and dimensional inspection
Seamless Heat-Exchanger Tube	ASTM B163 / ASME SB163	Condenser, steam-generator and heat-exchanger tubing	Hydrostatic or nondestructive testing, dimensional inspection and MTC
Seamless Pipe & Tube	ASTM B407 / ASME SB407 with ASTM B829 / ASME SB829	Seamless process pipe, instrumentation tube and heater tube	Hydrostatic or eddy-current testing, MTC and dimensional inspection
Welded Pipe	ASTM B514 / ASME SB514 with ASTM B775 / ASME SB775	Longitudinally welded process and heat-resistant pipe	Weld examination, pressure or specified NDT, heat-treatment record and MTC
Welded Heat-Exchanger Tube	ASTM B515 / ASME SB515 with ASTM B751 / ASME SB751	Boiler, condenser and heat-exchanger tubing	Flattening, flange and specified nondestructive tests, plus MTC
Forgings, Flanges and Valve Parts	ASTM B564 / ASME SB564, ISO 9725	Rings, discs, flanges, blocks and pressure-containing forgings	Mechanical testing, heat-treatment record, PMI, UT when specified and MTC
Wrought Fittings	ASTM B366 / ASME SB366	Elbows, tees, reducers, caps and custom wrought fittings	PMI, dimensional inspection, heat-treatment record and MTC
Welding Products	AWS A5.14 ERNiCr-3 / AWS A5.11 ENiCrFe-2	Welding wire, rod and covered electrodes	Consumable certificate, lot traceability and procedure qualification

Available Product Forms

Incoloy 800 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 or schedule to specification	Seamless or welded, annealed, pickled or bright finished	Heat exchangers, process piping, steam-generator tubing and heater systems	View Pipe & Tube
Round Bar	Diameter 3-300 mm, larger forged sizes and custom lengths available	Hot rolled, forged, annealed, peeled or polished	Furnace fixtures, shafts, valve parts, supports and machined components	View Round Bar
Sheet & Plate	Thickness 0.5-100 mm, custom widths, lengths and cut parts	Annealed, pickled, cold rolled or polished	Heat shields, furnace parts, vessels, baffles and fabricated equipment	View Sheet & Plate
Strip & Foil	Thickness 0.02-3 mm, slit widths and coil weights to specification	Cold rolled, annealed, bright or pickled	Heating-element sheathing, seals, expansion parts and formed components	View Strip & Foil
Wire	Diameter 0.1-12 mm, coil, spool or straight-length supply	Cold drawn, annealed, bright or cleaned	Furnace mesh, heating-system components, springs and retaining wire	View Wire
Fasteners	Standard and custom bolts, nuts, screws, studs and washers	Annealed, machined, rolled thread or custom finished	Heat-treatment equipment, chemical plants and elevated-temperature assemblies	View Fasteners
Fittings	ASME, EN and drawing-based elbows, tees, reducers and caps	Wrought or fabricated, annealed and inspected	Chemical piping, heat-exchanger connections and heater systems	View Fittings
Flanges	ASME B16.5, ASME B16.47, EN or custom dimensions	Forged, annealed, machined and inspected	Process piping, pressure equipment, heat exchangers and valve connections	View Flanges
Forgings	Rings, discs, blocks, shafts and drawing-based components	Forged, annealed, rough or finish machined	Valve bodies, tube sheets, rings, supports and pressure-containing parts	View Forgings
Welding Wire	Diameter 0.8-4.0 mm, spool, coil or straight-length supply	Clean bright finish, precision drawn and controlled chemistry	Joining Alloy 800, repair welding and heat-resistant fabrication	View Welding Wire

Material Selection Guide

When to consider Incoloy 800

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 Incoloy 800 Helps	Common Product Form	Buyer Note
Oxidizing high-temperature atmospheres	Chromium provides useful resistance to oxidation and scaling at elevated temperatures.	Sheet, plate, tube, bar and furnace components	Confirm maximum metal temperature, atmosphere and thermal-cycle frequency.
Carburizing and sulfidizing environments	The nickel-chromium-iron composition offers useful resistance in selected carburizing and sulfur-bearing atmospheres.	Tube, retort, tray, basket and fixture	Provide carbon potential, sulfur activity, oxygen potential and service temperature.
Heat-treatment equipment	The alloy combines heat resistance, formability and useful strength for repeatedly heated components.	Basket, tray, fixture, bar, wire and sheet	Specify load, operating temperature, cycle time and expected service life.
Resistance to chloride stress-corrosion cracking	Its nickel content provides better resistance than many conventional austenitic stainless steels.	Pipe, tube, sheet, fitting and heat exchanger	Confirm chloride concentration, temperature, aeration and residual stress.
Chemical and nitric-acid processing	Offers general corrosion resistance in selected aqueous and nitric-acid environments.	Heat-exchanger tube, pipe, plate and fittings	Review the complete chemical composition, concentration, temperature and contaminants.
Long-duration creep-controlled service	Standard Alloy 800 provides useful high-temperature strength but is not optimized for maximum creep-rupture performance.	Application-specific	Consider UNS N08810 Alloy 800H or UNS N08811 Alloy 800HT when creep or rupture governs the design.

Why Choose Us

Supply and quality support for Incoloy 800

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

Incoloy 800 questions from buyers

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

Incoloy 800 is used for heat-treatment baskets and fixtures, heat exchangers, chemical process piping, steam-generator tubing, electric-heating-element sheathing, pulp-processing heaters, furnace components and petrochemical equipment requiring corrosion and heat resistance.

Yes. UNS N08800 is the standardized designation for Incoloy 800. The material may also be identified as Alloy 800, Werkstoff 1.4876 or EN X10NiCrAlTi32-20.

Standard Alloy 800 permits carbon up to 0.10% and has no general coarse-grain requirement. Alloy 800H requires carbon of 0.05-0.10% and an average ASTM grain size of 5 or coarser, giving it better long-term creep and stress-rupture strength. N08800 should not be substituted for N08810 when the design specifically requires 800H.

Alloy 800HT should be considered when prolonged elevated-temperature service requires the highest qualified creep and rupture performance in the Alloy 800 family. UNS N08811 has controlled carbon, higher combined aluminum and titanium, coarse grains and a specified high-temperature solution treatment.

We can quote plate, sheet, strip, foil, round bar, rod, wire, seamless or welded pipe and tube, fasteners, fittings, flanges, forgings and welding wire. Custom dimensions, cut pieces, machining allowance and drawing-based products can also be discussed.

Common standards include ASTM B409 for plate, sheet and strip, ASTM B408 for rod and bar, ASTM B407 or B163 for seamless pipe and tube, ASTM B514 for welded pipe, ASTM B515 for welded heat-exchanger tube, ASTM B564 for forgings and ASTM B366 for wrought fittings.

Yes. Alloy 800 has good weldability using clean joint preparation, controlled heat input and a qualified welding procedure. AWS ERNiCr-3 filler metal and ENiCrFe-2 covered electrodes are commonly used, but the final consumable must match the service temperature, corrosion environment and construction code.

Please provide UNS N08800, product form, dimensions, quantity, applicable ASTM or ASME standard, delivery condition, certificate requirements and destination. Also send the service temperature, process atmosphere or chemical medium, drawings, welding requirements and inspection plan where applicable.

Incoloy 800