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Premium Incoloy 800H (UNS N08810) bar, tube, plate supplier. Nickel-iron-chromium alloy for high-temperature applications. ASTM/ASME compliant. Get quote.
Shanghai Hangbo Alloy Group Co., Ltd. is a premier manufacturer and supplier of Incoloy 800H (UNS N08810 / W.Nr. 1.4958). As the high-carbon version of Incoloy 800, 800H is specifically engineered for high-temperature structural applications where superior creep and rupture strength are essential.
ASTM Standards & Specifications
- ASTM B407: Seamless Pipe and Tube for high-temperature service.
- ASTM B409: Plate, Sheet, and Strip for pressure vessels and heat resistant applications.
Chemical Composition (ASTM B407/B409)
| Element | Ni | Fe | Cr | Carbon (C) | Al + Ti |
|---|---|---|---|---|---|
| Requirement (%) | 30.0 - 35.0 | 39.5 min | 19.0 - 23.0 | 0.05 - 0.10 | 0.85 - 1.20 |
Mechanical Properties & 800°C Performance
Incoloy 800H is solution annealed to produce a coarse grain size, which significantly enhances its creep-rupture strength. At a continuous operating temperature of 800°C (1472°F), the alloy maintains excellent dimensional stability and resistance to oxidation.
Material Characteristics & Applications
- Creep Resistance: Optimized for long-term load-bearing at high temperatures.
- Carburization Resistance: Excellent performance in reducing environments typical of petrochemical processing.
- Applications: Ethylene cracking furnace components, pigtails, headers, and radiant tubes in heat treating furnaces.
Global Project Case: Ethylene Cracking Furnace
Scenario: An industrial complex required high-reliability pigtail tubes for an ethylene cracking furnace. The components needed to operate at 800°C under high stress without significant deformation or carburization failure.
Solution: Hangbo Alloy supplied precision-manufactured Incoloy 800H tubes. Our strict control of carbon and Al+Ti levels ensured the tubes met the highest creep-rupture standards.
Service Performance: The furnace has operated for 5+ years without pigtail replacement. Inspections confirm that the Incoloy 800H components have retained their structural integrity at 800°C, significantly outperforming standard heat-resistant alloys.
Pros, Cons & FAQ
Pros
- Superior creep-rupture strength at temperatures above 600°C.
- Excellent resistance to high-temperature oxidation.
- Good weldability using Matching Filler Metals.
Cons
- Requires careful temperature control during fabrication to avoid embrittlement.
- Higher cost than standard heat-resistant stainless steels.
FAQ
Q: Can Incoloy 800H be used for pressure vessels?
A: Yes, it is approved under ASME Boiler and Pressure Vessel Code for high-temperature service.
Internal Links to Related Alloys
- Incoloy 800 - For general heat exchanger applications.
- Inconel 625 - For extreme strength and corrosion resistance.
- Nimonic 80A - For high-temperature aerospace fastening.
