Product Description
INCOLOY® alloy 890 (UNS N08890) is the latest addition to the INCOLOY alloy family of heat-resistant alloys. Alloy 890 joins existing INCOLOY products in offering high strength along with excellent resistance to oxidation, carburization and sulfidation at temperatures up to 2200°F (1200°C). Alloy 890 offers the high chromium content of alloy 803 along with enhanced properties from additions of molybdenum, silicon and niobium. The primary application for alloy 890 is tubes for ethylene pyrolysis furnaces.
STANDARD PRODUCT FORMS
Smooth bore tubes; Internally finned tubes
MAJOR SPECIFICATIONS
UNS N08890
ASTM B407, 408, 409
ASTM B407, 408, 409
LIMITING CHEMICAL COMPOSITION, %
Ni....... 40.0 - 45.0
Cr......23.5 – 28.5
Fe............ Balance
Mo.......... 1.0 - 2.0
Si............ 1.0 - 2.0
Nb.......... 0.2 - 1.0
Ta......0.10 – 0.60
Ti....... 0.15 - 0.60
Al.......0.05 – 0.60
C........0.06 – 0.14
Mn.......... 1.5 max.
Cu........0.75 max.
P...........0.03 max.
S........ 0.015 max.
PHYSICAL CONSTANTS AND THERMAL PROPERTIES
Density, Ib/in3.........................................................................0.287
g/cm3..........................................................................7.94
Coefficient of Expansion, 10-6 in/in•°F (μm/m•°C)
70-200°F (21- 100°C)................8.02 (14.47)
70-600°F (21- 300°C)................8.43 (15.11)
70-1000°F (21- 600°C)..............8.94 (16.40)
Thermal Conductivity, Btu • in/ ft2•h•°F........................... 550
W/m • °C.......................................... 79.3
Electrical Resistivity, ohm •circ mil/ft.......................... 212.47
μΩ•cm..............................................1033
Modulus of Elasticity*, 106 psi (GPa).................28.3 (195.1)
Shear Modulus*, 106 psi (GPa)............................. 10.7 (73.8)
Poisson’s Ratio*....................................................................0.322
Melting Range, °F (°C)..............2388 – 2522 (1309 – 1383)
g/cm3..........................................................................7.94
Coefficient of Expansion, 10-6 in/in•°F (μm/m•°C)
70-200°F (21- 100°C)................8.02 (14.47)
70-600°F (21- 300°C)................8.43 (15.11)
70-1000°F (21- 600°C)..............8.94 (16.40)
Thermal Conductivity, Btu • in/ ft2•h•°F........................... 550
W/m • °C.......................................... 79.3
Electrical Resistivity, ohm •circ mil/ft.......................... 212.47
μΩ•cm..............................................1033
Modulus of Elasticity*, 106 psi (GPa).................28.3 (195.1)
Shear Modulus*, 106 psi (GPa)............................. 10.7 (73.8)
Poisson’s Ratio*....................................................................0.322
Melting Range, °F (°C)..............2388 – 2522 (1309 – 1383)
TYPICAL MECHANICAL PROPERTIES
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Address: No. 5999, Huyi Road, Waigang Town, Jiading District, Shanghai
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