Incoloy 800 (UNS N08825 / 2.4858) Nickel-Iron-Chromium Alloy Forged Ring

Product Highlights

• Incoloy 800 nickel‑iron‑chromium austenitic alloy ring & hollow bar, UNS N08800 / W.Nr 1.4876, conforms to ASTM B409 / ASTM B564 forging specifications
• Ni‑Fe‑Cr‑Al‑Ti solid‑solution alloy; excellent oxidation and carburization‑resistance for high‑temperature furnace service up to 815 °C
• Good resistance to chloride‑induced stress‑corrosion‑cracking(SCC) for mixed high‑temperature‑gas plus hot brine condensation environments
• Non‑hardenable by quenching or aging; supplied in solution‑annealed water‑quenched soft state for ring / hollow‑bar CNC turning, boring and groove‑machining
• Custom OD, ID, wall‑thickness, height / length; full‑scope CNC processing strictly per customer CAD/PDF drawings
• Premium raw stock for industrial furnace rolled rings, radiant‑tube hollow blanks, waste‑incineration hardware, petrochemical thermal‑reactor internals and heat‑processing equipment components

Product Overview

This series of Incoloy 800 rings and hollow bars are manufactured by hot forging / hot‑piercing extrusion, followed by solution annealing and rapid water quenching to achieve homogeneous single‑phase austenitic microstructure. Standard delivery is solution‑annealed soft blank ready for rough‑and‑finish CNC machining.

Incoloy 800 (UNS N08800 / 1.4876) is classic nickel‑iron‑chromium solid‑solution austenitic alloy. Aluminium‑titanium elements support formation of stable protective oxide scale, delivering reliable oxidation‑ and carburization‑resistance under furnace high‑temperature gaseous atmospheres. It also shows good performance for scenarios with combination of high‑temperature gas and hot brine condensation. Note: Incoloy 800 is mainly designed for high‑temperature gaseous working conditions; select upgraded Incoloy 800H / 800HT when long‑term high‑temperature creep‑rupture strength is critical. Widely processed into seamless rolled furnace rings, radiant‑tube hollow‑bar segments, incinerator hardware and petrochemical thermal‑reactor internal components for heat‑treatment furnaces, waste‑to‑energy incineration and petrochemical thermal‑process industries.

Material Grade Characteristics – Incoloy 800 (UNS N08800 / 1.4876)

• Solid‑solution‑strengthened nickel‑iron‑chromium austenitic alloy; cannot gain hardness by quenching or aging heat‑treatment
• Al‑Ti‑Cr composite oxide‑scale system provides outstanding oxidation and carburization‑resistance for furnace environments up to 815 °C
• High‑nickel matrix mitigates chloride‑stress‑corrosion‑cracking risk for equipment exposed to hot brine condensate
• Good ductility and fabricability under solution‑annealed condition; compatible with conventional TIG/MIG welding; post‑weld solution‑annealing recommended for severe thermal‑cycling assemblies
• Reminder: Not optimized for heavy mineral‑acid long‑term immersion; for sustained‑load service above 600 °C requiring creep‑rupture performance, choose Incoloy 800H / 800HT variant
• Solution‑annealed quenched delivery guarantees low residual stress and uniform austenite matrix for ring‑hollow‑bar forging fabrication

Chemical Composition (Weight %)

Mechanical Properties (Solution Annealed, ASTM B409 / B564)

Related Material Grades

• Incoloy Series: 800, 800H, 800HT, 825, 925
• Inconel Series: 600, 601, 625, 718, X‑750
• Hastelloy Series: C‑4, C22, C276, B3
• Heat‑Resistant Stainless: 253MA, 310S, 309S
• Super‑Austenitic: 904L, 254SMO
• Duplex / Super Duplex: 2205, S32750, S32760
• PH Stainless Steel: 17‑4PH,15‑5PH
• Alloy Steel:4140, F22, F91, A105

Key Advantages

1 Reliable High‑Temperature Oxidation‑Carburization Resistance
Cr‑Al‑Ti composite protective‑oxide layer provides stable performance for furnace atmosphere service up to 815 °C, resisting scaling and carburization‑induced material embrittlement.

2 Good Chloride SCC Resistance for Condensing Environments
High‑nickel matrix reduces chloride stress‑corrosion‑cracking risk for components subject to high‑temperature‑gas mixed with hot brine‑condensation.

3 Good Fabrication & Weld Compatibility
Solution‑annealed condition delivers good ductility for turning, boring and ring‑groove‑machining; post‑weld solution‑annealing is recommended for parts under severe thermal‑cycling load.

4 Cost‑Effective Furnace Alloy
Economical choice for furnace‑ring and radiant‑tube hollow‑bar compared to higher‑grade nickel‑base superalloys for non‑creep‑critical high‑temperature‑gas applications.

5 Versatile Industrial Acceptance
Well‑proven alloy for heat‑treatment furnaces, waste‑incineration and petrochemical thermal‑processing equipment worldwide.

Typical Applications

• Industrial Heat‑Treatment Furnace: Furnace retaining rolled rings, radiant‑tube hollow‑bar blanks, fixture‑support ring forgings, muffle‑component preforms
• Waste‑To‑Energy Incineration: High‑temp flue‑gas‑exposed ring‑segments, thermal‑oxidizer hollow‑bar internals, incinerator hardware blanks
• Petrochemical Thermal‑Process: Reactor thermal‑zone hollow‑bar liners, low‑creep‑demand process‑equipment ring‑forging parts
• Heat‑Processing Equipment: Atmosphere‑furnace structural‑ring components, high‑temperature thermal‑cycling hardware
• Power‑Plant Thermal‑System: Waste‑heat‑recovery hollow‑bar and ring‑shaped support‑component blanks

Processing Service

We provide integrated hot‑forging / hot‑pierced hollow‑bar & seamless rolled‑ring production, full custom CNC machining per customer CAD/PDF drawings:

• Cut‑to‑length / ring‑height sizing, facing, centering, OD turning, ID boring, chamfering
• Precision threading, internal / external groove‑machining, cylindrical grinding & surface polishing for ring‑hollow‑bar parts
• Technical consultation for Incoloy 800 / 800H / 800HT grade‑selection and high‑temperature welding‑procedure guidance
• Pickling, passivation anti‑corrosion surface finishing

We supply Incoloy 800 ring forgings, hollow‑bar blanks and fully‑machined components for furnace, waste‑incineration, petrochemical and global industrial clients.

Quality Assurance

• 100% UT ultrasonic + eddy‑current inspection for forging / piercing internal segregation, inclusion and surface crack defects
• Full‑batch tensile, yield, elongation mechanical‑property testing for each heat lot
• Spectrometer full‑spectrum chemical‑composition verification per heat number (strict check Al‑Ti‑Cr‑Ni key alloying‑elements)
• Metallographic homogeneous austenite‑matrix microstructure inspection, verify absence of harmful precipitated phases
• High‑precision micrometer & CMM inspection for OD, ID, wall‑thickness, height / length and dimensional‑tolerance control

Mill Test Certificate EN 10204 3.1 can be issued and delivered together with shipment documents before delivery.

Packing & Delivery

Packing ‑ Inner: Independent anti‑rust plastic sleeve + waterproof film full wrap for ring / hollow‑bar surface scratch protection ‑ Outer: Reinforced fumigated wooden pallet / wooden case with separation blocks to avoid collision & deformation ‑ Custom heavy‑duty export packaging for large‑diameter rings & heavy‑wall hollow bars available upon request

Lead Time
Normally 20‑60 working days after receiving advance payment. Exact lead time depends on ring / hollow‑bar dimension, wall‑thickness, order quantity and custom‑machining demands.

Request Custom Quotation

Please specify part type (ring / hollow bar), OD‑ID‑wall‑thickness‑dimension, drawings and whether you require raw forging blank or fully‑machined finished parts. Our nickel‑alloy metallurgy team will provide competitive factory price within 24 hours. Free grade‑selection consultation between Incoloy 800 / 800H / 800HT for high‑temperature‑service conditions!