UNS N08800 (Incoloy 800)
Generic Name & Synonyms
Incoloy 800®, Alloy 800, Nickel Alloy 800,W.Nr. 1.4876, X10NiCrAlTi32-20 (DIN/EN)
Product Overview
UNS N08800 (widely known as Incoloy 800) is an iron-nickel-chromium solid-solution alloy designed for high-temperature structural and corrosion-resistant service.
It bridges the gap between standard stainless steels and high-cost nickel superalloys, delivering cost-effective performance in high-temperature environments where resistance to creep, oxidation, and carburization is required.
Key Highlights
✅ Balanced Iron-Nickel-Chromium Matrix: High nickel (30-35%) and chromium (19-23%) formulation provides an economical solution for heat and corrosion resistance.
✅ Resistant to Carburization & Industrial Gases: Resists oxidation, carburization, and nitriding at elevated service temperatures up to 815°C (1500°F).
✅ Immunity to Stress Corrosion Cracking: Superior resistance to chloride stress-corrosion cracking compared to standard 300-series austenitic stainless steels.
✅ Microstructural Stability: Maintains ductility and mechanical stability during prolonged exposure to elevated temperatures without embrittlement.
✅ Large Stock Availability by BELNADE: High inventory of heat exchanger tubing, plates, and round bars ready for international shipment.
Chemical Composition & Physical Properties
1. Chemical Composition (wt%)
Element | Ni | Cr | Fe | Al | Ti | C | Mn | Si | Cu | S |
Min (%) | 30.0 | 19.0 | 39.5 | 0.15 | 0.15 | — | — | — | — | — |
Max (%) | 35.0 | 23.0 | Bal. | 0.60 | 0.60 | 0.10 | 1.5 | 1.00 | 0.75 | 0.015 |
(Note: Total Aluminium + Titanium content Al + Ti is controlled within 0.30%–1.20% per ASTM B407/B409.)
2. Physical & Mechanical Properties
Parameter | Value / Standard (Annealed State) |
Density | 7.94 g/cm³ (0.287 lb/in³) |
Melting Range | 1357°C – 1385°C (2475°F – 2525°F) |
Tensile Strength (Rm) | ≥ 520 MPa (75 ksi) |
Yield Strength (0.2%, Rp0.2) | ≥ 205 MPa (30 ksi) |
Elongation (A5) | ≥ 30% |
Hardness Range | ≤ 192 HBW (90 HRB) |
Available Forms & Specifications
BELNADE supplies UNS N08800 in standard mill product forms:
Heat Exchanger Tubing: ASTM B163 / B407; Cold-drawn seamless tubes for boiler applications.
Plates & Cut Sheets: ASTM B409; Hot-rolled plates from 2mm to 40mm thickness.
Round Bars & Rods: ASTM B408; Annealed or cold-finished bars up to 250mm diameter.
Pipes & Pipe Fittings: ASTM B407 / B366; Seamless pipes and matching butt-weld fittings.
Typical Application Scenarios
Ethylene Pyrolysis & Steam Reformers: Pigtail piping, manifold headers, and furnace tubing.
Thermal Processing & Heat Treating: Radiant tubes, muffles, retorts, and heating element sheathing.
Power Generation: Electric range heating element sheathing and nuclear steam generator tubing.
Chemical Processing: Nitric acid production equipment and process heater coils.
Quality Assurance & Verification
Every shipment from BELNADE comes with complete testing documentation:
Mill Test Certificate to EN 10204 3.1
PMI Material Identification Audit
Tensile, Hardness, and Dimensional Inspection
Hydrostatic and Ultrasonic Testing for Tubes/Pipes
Supplier Profile: BELNADE
Get in Touch with BELNADE for Quotes and Technical Inquiries
📧 Email: [email protected]
🌐 Website: www.belnade-material.com
💬 Mobile/ WhatsApp: +86 183 6997 5713