Nickel alloys 800H & 800HT, are nickel-iron-chromium alloys that have the same basic composition as INCOLOY alloy 800 but with significantly higher creep-rupture strength. The higher strength results from close control of the carbon, aluminum, and titanium contents in conjunction with a high-temperature anneal.
Applications Incoloy 800H & 800HT:
Incoloy 800H & 800HT are used in chemical and petrochemical processing, power plants for super-heater and reheater tubing, industrial furnaces, and heat-treating equipment.
Normal product forms: Pipes, tubes, sheets, strips, plates, bars, forgings, and wires.
Specifications/Standard: ASTM A 240, A 480, B 163, B 366, B 407 – 409, B 514, B 515, B 564, B 751, B 775, B 829, ASME SA-240, SA-480, SB-163, SB-366, SB-407 – SB-409, SB-514, SB-515, SB-564, SB-751, SB-775, SB-829, etc.
Chemical Composition of 800H:
Nickel (Ni): 30-35%
Chromium (Cr): 19-23%
Iron (Fe): 39.5% Min
Carbon (C): 0.05-0.1%
Aluminum (Al): 0.15-0.6%
Titanium (Ti): 0.15-0.6%
(Al + Ti): 0.3-1.2%
Chemical Composition of 800HT:
Nickel (Ni): 30-35%
Chromium (Cr): 19-23%
Iron (Fe): 39.5% Min
Carbon (C): 0.06-0.1%
Aluminum (Al): 0.25-0.6%
Titanium (Ti): 0.25-0.6%
(Al + Ti): 0.85-1.2%
Physical Constants and Thermal Properties
Density: 7.94 gm/cm³
Melting range: 1350-1400 °C
Mechanical Property:
Tensile strength (annealed): 600 MPa
Yield strength (annealed): 275 MPa
Elongation at Break: 45%
