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PRODUCT DATA of Incoloy 800
MaterialIncoloy 800
Product DatasheetIncoloy alloy 800
General InformationA nickel-iron-chromium alloy with good strength and excellent resistance to oxidation and carburization in high-temperature atmospheres. It also resists corrosion by many aqueous environments. The alloy maintains a stable, austenitic structure during prolonged exposure to high temperatures It is an austenitic, solid-solution alloy. Titanium nitrides, titanium carbides, and chromium carbides normally appear in the alloy’s microstructure. Like many austenitic stainless steels, the alloy can be sensitized, or made susceptible to intergranular attack in some aggressive media, by exposure to the temperature range of 540–760°C.
PrecautionsData from Manufacturer datasheet
Product TypeAnnealed 980°C/15 min.
Chemical CompositionFe-33Ni-20Cr-1Al+Ti
Name of ManufacturerSpecial Metals Wiggin Ltd
Hereford, England
+44 (0)1432 382200
+44 (0)1432 264030
info@specialmetalswiggin.co.uk
EXPERIENCE IN PRACTICE
Development StatusCommercial Product
Lot ReproducibilityGood
Equivalent DesignationsUNS N08800; 1.4876; AFNOR Z5 NC 35-20
PHYSICAL PROPERTIES
Specific Gravity7.94
Curie Temperature-115 °C
ELASTIC PROPERTIES
Tensile Modulus197 GPa
Shear Modulus73.4 GPa
Poisson Ratio0.339
ELECTRICAL PROPERTIES
Electrical Volume Resistivity9.89e-7 ohm.m
THERMAL PROPERTIES
Thermal Conductivity11.5 W/m.K
Thermal Expansion Coefficient14.4 μstrain/°C
Melting Range1360 to 1390 °C
Specific Heat0.46 J/g.K
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
General Corrosion StatusNo specific corrosion protection required
Stress Corrosion StatusHigh Resistance to SCC: Table 1
Data Quality: Design Data
Bimetallic CorrosionCan be connected without any restriction to: 400 series Stainless steel
Can be connected in a non-controlled environment to the above and 300 series stainless steel, Ti and Ti-alloys, Cr, Cu, brasses, Cu-Ni, Al-bronzes, Si-bronzes,
Can be connected in a clean room environment to above and Ag, SnPb alloys, Sn, Pb, low C steel, Al-Cu alloys, Cd, Au
Needs specific measures: All others
Test:ECSS-Q-ST-70C Rev.1 Table 5.1
Data Quality: Design Data
Machinabilitystandard procedures
WeldingGood weldability by all welding processes. Material to be welded must be thoroughly clean, and the proper joint designs must be used.