Incoloy800HT (N08811/1.4954) nut

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UNS	Trademark	W.Nr
N08811	Incoloy800HT	1.4954

 

chemical composition of Incoloy800HT nut:

Alloy	%	Ni	Cr	Fe	C	Mn	Si	Cu	S	Al	Ti
Incoloy 800HT	Min	30	19	Balance	0.05					0.15	0.15
	Max	35	23		0.10	1.5	1.0	0.75	0.015	0.60	0.60

 

Physical properties of Incoloy800HT nuts

density	8.0g/cm³
melting point	1350~1400 °c

 

The minimum mechanical properties of Incoloy800HT nut alloy at room temperature:

Alloy status	tensile strength Rm N/mm2	Yield Strength RP0.2 N/mm2	Elongation A5%
Hastelloy X	500	210	35

 

Incoloy800HT nut alloy has the following characteristics:

1. Excellent corrosion resistance in extremely high temperature aqueous media up to 500℃
2. Excellent resistance to stress corrosion
3. Very good processability

 

The metallographic structure of Incoloy800HT nut:

Incoloy 800HT has a face-centered cubic lattice structure. The extremely low carbon content and increased Ti:C ratio increase structural stability and maximum resistance to sensitization and intergranular corrosion. Low-temperature annealing at around 950°C ensures a fine-grained structure.

 

Corrosion resistance of Incoloy 800HT:

Incoloy 800HT is resistant to many corrosive media. Its high nickel content makes it very resistant to stress corrosion cracking in aqueous corrosive conditions. The high chromium content gives it better resistance to pitting and crevice corrosion cracking. This alloy has good corrosion resistance to nitric acid and organic acids, but has limited corrosion resistance in sulfuric acid and hydrochloric acid. In addition to the possibility of pitting corrosion in halides, it has good corrosion resistance in oxidizing and non-oxidizing salts. It also has good corrosion resistance in water, steam and mixtures of steam, air and carbon dioxide.

 

Incoloy 800HT Application Scope Application areas include:

1. Nitric acid condenser–resistant to nitric acid corrosion
2. Steam heating tube–very good mechanical properties
3. Heating element tube–very good mechanical properties

For applications in environments up to 500°C, the alloy is supplied in the annealed condition.