Frame 6001B Nozzles
Chromalloy offers turbine 2nd and 3rd Stage Nozzles
Second and third stage nozzle segments are
nozzles for all three stages also manufactured through an investment
of the Frame 6B gas turbine. casting process but utilize an advanced Nickel-
based superalloy IN939. IN939 was selected to
All stages of Nozzles are designed within the meet customer expectations of service life, and
Chromalloy group of companies. Our experience reparability.
in servicing turbine nozzles throughout their life
cycle has provided a unique insight into designing IN939 is similar to material being used by the
a high quality product that is compatible with the OEM; it offers improved creep strength over the
original equipment. original Cobalt-based material FSX-414 and is
weld repairable.
1st Stage Nozzle
The first stage nozzle is manufactured through an In addition, we have included a reduced
investment casting process utilizing an advanced cooling air flow design (improved from the older
Cobalt-based superalloy. We have incorporated Cobalt-based alloy nozzle) that incorporates an
design features in the airfoil to help reduce life improved core plug and internal impingement
limiting conditions such as segment partition cooling pattern for the second stage nozzle. This
and sidewall cracking, cooling hole cracking, reduction in cooling air to the nozzle can result
sidewall erosion and oxidation. Utilizing our Life in performance benefits. We have used a non-
Cycle Extension technologies, we apply a thermal pressurized diaphragm cooling circuit to optimize
barrier coating (TBC) for improved durability and cooling flow to the wheel spaces. The third
longer life. In addition, we have incorporated an stage nozzle is not air cooled. We also apply an
enhanced cooling circuit consisting of improved aluminide coating to the nozzle airfoil surface to
side wall cooling and increased trailing edge provide added oxidation resistance to the second
cooling hole sizes, as well as an up-rated core stage nozzle. Both second and third stage
plug to allow the nozzle to operate at up-rated nozzles are capable of operating at up-rated 2055
firing temperatures 2055 to 2084 °F (1124 to to 2084 °F (1124 to1140 °C) firing temperature.
1140 °C). The nozzle includes an improved nozzle
support ring sealing feature (chordal hinge) to
improve efficiency of the gas turbine.
chromalloy.com
Stage 1 Nozzle (S1N) Stage 3 Nozzle (S3N)
Firing Temp: Suitable for all firing temperatures. Firing: Temp Suitable for all firing temperatures.
Design: Two Vane Segments mounted in a Design: Four Vane Segments.
retaining ring.
Material: IN939 – A Nickel-based superalloy.
Material: FSX414 – A Cobalt-based superalloy This is much more creep resistant than the original
which is the same as used by OEM. Coating design made from FSX414 and is similar in
TBC applied to airfoil section and inner and properties to the OEM’s.
outer sidewalls.
Cooling: Not cooled.
Coating: TBC applied to airfoil section and
Sealing: Inter-segment seals with “tear-drop” ends
inner and outer sidewalls.
for improved sealing and durability.
Cooling: Improved trailing edge film cooling.
Addition of side wall cooling. Improved core
plug cooling. Chromalloy provides power producers around
the world with high-tech coatings, repairs and
Sealing: Improved sealing to reduce leakage at
replacement parts that extend the life of gas
Nozzle support ring (chordal hinge).
turbine engines and reduce operating expenses.
Through Turbine Services Limited, a wholly
Stage 2 Nozzle (S2N) owned subsidiary of Chromalloy, we also provide
a wide range of services including field services,
Firing Temp: Suitable for all firing temperatures. engineering, maintenance, long term service
Design: Three Vane Segments. agreements, controls and monitoring.
Material: IN939 – A Nickel-based superalloy. Chromalloy extends engine life like no other
This is much more creep resistant than the company can by providing the industry’s only
original design made from FSX414 and is complete independent value chain—including
similar in properties to the OEM’s. design engineering, state-of-the-art castings,
Coating: Aluminide coating to improve machining, coatings, repairs and field services.
Oxidation resistance. These unrivaled capabilities represent 60 years of
innovation—and they can make an impact today.
Cooling: Improved core plug and internal airfoil
impingement cooling.
Sealing: Inter-segment seals with “tear-drop” Services include:
ends for improved sealing and durability. – Plant operation and maintenance
– Plant operator training
– Field and engineering support
– Rotor Overhaul
– Component refurbishment
– Condition Monitoring
– Replacement spare parts
– Long Term Service Agreements
– Turbine control systems
– Turbine Refurbishment
3999 RCA Blvd., Palm Beach Gardens, FL 33410 chromalloy.com
