Incoloy 800HT 

Its high nickel content makes it have good stress corrosion cracking resistance under water-based corrosion conditions. 

The high chromium content makes it have better resistance to pitting corrosion and crevice corrosion cracking. 

Characteristics
Excellent corrosion resistance in extremely high temperature aqueous media up to 500ºC
Good resistance to stress corrosion
Good processability

Similar grades
Z8NC32.21 (France), W Nr.1.4876, X10NiCrAlTi3220 (Germany) NA15 (UK) Incoloy800HT, UNS NO8811 (United States) FeNi32Cr21AlTi (ISO)

Chemical composition
                  Ni     Cr      Fe         C      Mn    Si    Cu    Mo    Al     Ti     P       S   
Minimum   38   19.5                                          1.5    2.5           0.6
Maxmum   46   23.5  margin  0.025  1.0   0.5   3.0    3.5   0.2   1.2  0.02  0.01 

Density: ρ=8.0g/cm3

Melting temperature range: 1350~1400ºC