INCOLOY800H/HT is an austenitic heat-resistant alloy widely used in high-temperature pressure-bearing structural parts. The high strength of 800H/HT is mainly due to the addition of carbon, aluminum, and titanium elements, and it is annealed at a minimum temperature of 1149ºC to achieve The grain size is ASTM5 grade or coarser.
Material Standard: UNS American Standard: N08811, N08810
W. Nr./EN European Standard: 1.4958, 1.4959 ASTM: B 409, B 408, B 407
ASME: SB-409, SB-408, SB-407 Code Case 1325
Chemical composition
Cr Ni Mn Si Al Ti Al + Ti C Cu P S Fe
Minimum 19.0 30.0 - - 0.15 0.15 0.85 0.06 - - - 39.5
Maxmum 23.0 35.0 1.5 1.0 0.6 0.6 1.2 0.1 0.75 0.045 0.015 -
Density: ρ=8.0g/cm3
Melting temperature range: 2475- 2525°F (1350-1400°C)
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