  Concorde stage 5 turbine stator.
This blade is from the turbine (hot exhaust) side of an engine from the decommissioned Concorde supersonic passenger jet. Specifically it is the HPCST5 (fifth-stage stator) blade, meaning it is a blade that is fixed to the housing of the engine, not rotating with the core. It is made of Nimonic alloy, probably Nimonic-90, one of a family of nickel-chromium super-alloys with the composition:
Ni 54% min
Cr 18-21%
Co 15-21%
Ti 2-3%
Al 1-2%
Be sure to click the Source link below to see a whole series of lovely Concorde turbine and compressor blades in several different alloys.
Source: eBay seller afterburner713
Contributor: Theodore Gray
Acquired: 8 April, 2009
Text Updated: 9 April, 2009
Price: $25
Size: 4"
Purity: 54%
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