Incoloy 800H (US UNS n08810 / German w.nr.1.4958)

Chemical composition of Incoloy 800H:

Physical properties of Incoloy 800H:

In the solution state of Incoloy 800H, the mechanical properties of the alloy at room temperature:

800H alloy has the following characteristics:

800H has excellent corrosion resistance and good stress corrosion resistance in the extremely high temperature water-based medium up to 500 ℃, and can withstand many corrosive medium corrosion. Its high nickel content makes it have a good resistance to stress corrosion cracking under water-based corrosion conditions. High chromium content makes it have better resistance to spot corrosion and crevice corrosion cracking. The alloy has good corrosion resistance to nitric acid and organic acid, but its corrosion resistance in sulfuric acid and hydrochloric acid is limited. In addition to the possibility of spot corrosion in halides, it has good corrosion resistance in oxidizing and non oxidizing salts. It also has good corrosion resistance in water, steam and mixture of steam, air and carbon dioxide

Metallographic structure of Incoloy 800H:

800H is a face centered cubic lattice structure. The extremely low carbon content and the increased Ti: C ratio increase the stability of the structure, the maximum resistance to sensitization and intergranular corrosion. Low temperature annealing at about 950 ℃ ensures fine grain structure

Incoloy 800H is applied in the following fields:

1. Nitric acid condenser

2. Steam heating pipe

3. External storage of electric heating pipe

For applications up to 500 ℃, the alloy is supplied as annealed

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Cold and hot plate, strip, tube, wire, forging bar, hot rolling bar, machined products