Pratt & Whitney PW4000 Stage 1 HPT Vane Cluster - P/N : 50K851-005 For Sale

***** Pratt & Whitney PW4000 Stage 1 HPT Vane Cluster ****
*** Part Number : 50K851-005
**** Utilization of PW4000-powered aircraft (like Boeing 747, 767, or Airbus A330 airframes)
*** Really hard to find item.Item Specifics

• Brand: Pratt & Whitney
• Manufacturer Part Number (MPN): 50K851-005
• Component Type: High-Pressure Turbine (HPT) Stage 1 Vane Cluster
• Engine Application: Pratt & Whitney PW4000 Series (e.g., PW4062)
• Material: PWA 1484 Single-Crystal Nickel Superalloy
• Country/Region of Manufacture: United States

Product OverviewFor sale is a genuine Pratt & Whitney High-Pressure Turbine (HPT) Stage 1 Vane Cluster, Part Number 50K851-005.This critical, high-engineered gas path component is designed for the Pratt & Whitney PW4000 turbofan engine series, commonly utilized on commercial widebody aircraft.Manufactured from advanced PWA single-crystal nickel superalloy with an integrated Thermal Barrier Coating (TBC), this component is built to withstand extreme turbine environments.Component Details

• Part Number: 50K851-005
• OEM: Pratt & Whitney (CAGE Code: 77445)
• Engine Model Fitment: PW4000 Series
• Material Composition: Second-generation single-crystal superalloy

The Stage 1 High-Pressure Turbine (HPT) vane cluster (part number 50K851-005) is made from a highly advanced, proprietary nickel-based single-crystal (SC) superalloy.Specifically, Pratt & Whitney utilizes their signature PWA 1480 or second-generation PWA 1484 alloy specifications for the high-pressure turbine gas path components on the PW4000 engine series.The metallurgical composition and physical architecture are highly engineered to survive the brutal environment of the engine\'s first turbine stage:Chemical CompositionWhile the exact formulation is a heavily guarded trade secret, second-generation nickel-based superalloys like PWA 1484 are heavily alloyed with dense, heat-resistant refractory metals

• Base Metal: Nickel (Ni)
• Key Strengthening Elements: Cobalt (Co), Chromium (Cr), Tungsten (W), Tantalum (Ta), and Aluminum (Al)
• The \"Secret Weapon\": Rhenium (Re) (typically ~3% by weight).
• Rhenium acts as a massive disruptor to atomic movement, dramatically slowing down structural \"creep\" (stretching under centrifugal load and heat)
• 
  
• The Stage 1 High-Pressure Turbine (HPT) vane cluster (part number 50K851-005) is made from a highly advanced, proprietary nickel-based single-crystal (SC) superalloy.Specifically, Pratt & Whitney utilizes their signature PWA 1480 or second-generation PWA 1484 alloy specifications for the high-pressure turbine gas path components on the PW4000 engine series.The metallurgical composition and physical architecture are highly engineered to survive the brutal environment of the engine\'s first turbine stage:Why a Single-Crystal Superalloy?
  • No Grain Boundaries: Traditional metals are made of billions of microscopic interlocking metal grains. Under intense heat and stress, those boundaries are exactly where a metal splits or cracks. Single-crystal casting methods grow the entire vane cluster as one single continuous crystal, eliminating those weak points entirely.
  • Extreme Heat Limits: The gas exiting a PW4000 combustor onto this specific vane stage can exceed 1,600°C (2,900°F). This temperature is actually higher than the melting point of the metal itself.
  Protective CoatingsBecause the alloy alone cannot survive the raw combustion environment, the metal substrate is coated in layered protective technologies.
  1. Bond Coat: An overlay alloy layer (typically an MCrAlY or platinum-aluminide layer) that bonds directly to the nickel superalloy to prevent high-temperature oxidation.
  2. Thermal Barrier Coating (TBC): A top layer of specialized ceramic material—typically Yttria-Stabilized Zirconia (YSZ)—is plasma-sprayed onto the exterior. This ceramic jacket acts like a heat shield, dropping the actual temperature felt by the underlying metal alloy by several hundred degrees.