Incoloy 800H
Incoloy 800H delivers long-term strength and oxidation resistance at temperatures up to 1000°C. Excellent stability under thermal cycling and carburizing atmospheres.
Incoloy 800H and 800HT are modified versions of 800 for improved high-temperature strength and stress rupture performance.
ASTM B409 – Plate, Sheet, Strip
• For thermal vessels, reformers, flue gas ducts
• Annealed & descaled or bright finish
ASTM B407 – Seamless Pipe & Tube
• For high-temperature service in refineries and heat exchangers
• Hydrotested, NDT, grain-size controlled
ASTM B408 – Bar, Rod
• For bolting, forgings, valve parts, fittings
• Hot rolled / forged, annealed
Incoloy 800H Plate / Sheet | Size: 1500 × 3000 mm | Thickness: 6 – 40 mm (Updated: July 2025)
Incoloy 800H Seamless Pipe | OD: Custom | Wall: Variable (Updated: July 2025)
Incoloy 800H Bar / Rod | Dia: Custom | Finish: Hot/Cold Drawn (Updated: July 2025)
Testing & Certifications
Non-Destructive Testing
• PMI / XRF • UT • Eddy Current (for tubing)
Destructive Testing
• Tensile • Stress rupture • Grain size / Hardness
Documentation
• EN 10204 3.1 MTC (3.2 with ITP)
• Third-party: SGS / TUV / Lloyd’s / BV
• Heat traceability & inspection stamps for pressure system compliance
Beyond Certified: Introducing The Alloy360 VANTAGE Program
We don’t just sell certified material. We re-certify it ourselves and then have an independent expert verify it. This is our definition of uncompromising integrity.
- Certified Incoloy 800H in seamless pipe, plate, bar, and custom forms.
Forms: Plate / Sheet / Seamless Pipe / Bar / Forging Stock
Standards: ASTM B409, B407, B408
UNS: N08810 / N08811
W.Nr.: 1.4958 / 1.4959
FAQs
The key difference is carbon content and grain size control. 800H has higher carbon (0.05–0.10%) and is heat-treated for improved creep and stress rupture strength, making it better suited for high-temperature service.
Yes. 800H is specifically designed for service up to 1000°C. It maintains structural stability and oxidation resistance at elevated temperatures, unlike standard stainless steels.
Yes, it is weldable using standard processes like GTAW and SMAW. Use filler metals such as Inco-Weld A or ERNiCr-3. Post-weld heat treatment is generally not required, but grain size control must be maintained for high-temp service.
800H offers superior mechanical strength at high temperatures, while Incoloy 825 is better for acidic and reducing environments. SS 310S can handle even higher temps but has lower long-term strength.
Yes. Incoloy 800H is listed in ASME Boiler & Pressure Vessel Code, Section VIII and approved for elevated temperature applications in petrochemical and thermal plants.
From Dubai: 5–10 working days
From China: 4–6 weeks
Custom dimensions or thick-wall seamless: 6–8 weeks
