SGT6-8000H heavy-duty gas turbine (60 Hz)

Well-proven H-class technology backed by largest commercially operating fleet experience in the market

    Rotate product

    Proven rotor design for world-class fast start on cold-rotor and hot-restart capability

    Hydraulic Clearance Optimization (HCO) improves performance and reduces degradation

    Advanced can annular combustion system for high fuel flexibility and reliability

    Rotating blades replaceable without rotor de-stack or lift

    4-stage turbine with advanced materials and thermal barrier coating

    High cycling capability due to fully on-board internally air-cooled turbine section

    Improved part-load efficiency due to variable inlet guide vane plus 3 stages of fast-acting variable guide vanes

    Simple cycle power generation (ISO) 0 MW(e)

    Combined cycle efficiency: 61%

    Outstanding performance and efficiency

    Excellent performance and outstanding efficiency

    The SGT6-8000H was the very first air-cooled H-class gas turbine on the 60 Hz market and has since demonstrated its high operational flexibility and low lifecycle costs. More than 750,000 fired hours of operational experience make it the most reliable and tested H-class gas turbine technology available today. With a power output of 310 MW in simple cycle, or 460 MW in combined cycle operation, and a combined cycle efficiency of 61%, it is among the most efficient and powerful gas turbines in commercial operation.


    Highlights of the SGT6-8000H gas turbine

    In combined cycle operation, the SGT6-8000H gas turbine provides a power output of 460 MW and an efficiency of 61%. Its internal cooling air passages from compressor to turbine section ensure fast thermal response of the rotor in case of high load transients and fast cold starts. A gas turbine designed for short start-up times and high operational flexibility.

    The SGT6-8000H can be easily integrated in single-shaft (SCC6-8000H 1S) or multi-shaft (SCC6-8000H 1x1, 2x1, or 3x1) combined cycle plants.

    Our proven and validated package and plant concepts use standardization, preassembly and prepackaging to minimize field assembly and the need for piping fabrication during construction. This results in easy turbine installation and a shorter project duration. 

    The blade design is based on proven materials and manufacturing processes, while incorporating latest aerodynamic technologies. Your benefit: high efficiency and reliability, as well as low outage risk.

    Moderate firing temperatures allow the use of proven materials to boost reliability and keep maintenance low. 

    Additionally, the SGT6-8000H has been optimized for short outages: Thanks to the Hirth-serrated rotor disk assembly and central tie rod, rotor maintenance and de-stacking can be done onsite. The turbine blades 1 and 4, and vane 1 can be removed without lifting the cover for quick and easy maintenance.

    The gas turbine is capable of world-class fast cold starts and hot restarts due to the light and stiff rotor with internal cooling air passages, the advanced can annular combustion system and Hydraulic Clearance Optimization (HCO) active clearance control. You can achieve combined cycle base load within 30 min for hot starts.

    Four stages of fast-acting variable-pitch guide vanes (VGV) will grant you optimized performance over a wide range of operating conditions, improved part load efficiency, low part load emissions, and high load transients.

    Around 60 Siemens H-class gas turbines are in commercial operation, with about 750,000 fired hours.  

    Overall, more than 85 H-class turbines are under contract. 

    Ingenious design to the core

    The rotor is based on self-centering and -aligning discs with Hirth serration and central tie rod, providing you with the advantage of on-site rotor maintenance. 

    The advanced can annular combustion system creates a uniform temperature profile at the turbine entry, ensuring a high fuel flexibility and reliability of your gas turbine. Moderate firing temperatures allow the use of proven materials that improve reliability while reducing maintenance, leading to excellent availability.



    Standardized design, flexible solutions

    The SGT6-8000H package solution consists of the core turbine, an SGen6-100A generator (or optionally, an SGen6-2000H generator), and auxiliary systems. 

    We offer you a standardized basic design with options geared to your specific requirements, as well as flexible solutions for short installation times and economic power generation. By grouping subsystems and installing them in separate auxiliary packages, we strive to minimize field assembly.

    The gas turbine generator packages have a compact footprint designed for limited space requirements.



    The SGT6-8000H fires up

    Combined cycle power plants based on the SGT6-8000H (plant name: SCC6-8000H) are profitable solutions for competitive energy markets with fluctuating power demand. Featuring a fast-start capability, it will achieve combined cycle base load within 30 min for hot start (start-up gradient: 30 MW/min). High load gradients allow for fast load changes. With excellent peaking capabilities, and a high part load efficiency with emission compliance down to lower part load, the SGT6-8000H plants strike an optimal balance between capital costs, performance, and operational considerations. 



    SGT6-8000H: Designed for short outages and easy maintenance

    We offer Long Term Programs (LTP), overhaul services, field service, spare parts, reconditioning of components and modernization upgrades. Whether scheduled service or short-term support, our specialists are there for you, on-site all over the world. 

    The SGT6-8000H generator package is optimized for short outages. On-site rotor maintenance, including rotor de-stacking and balancing, eliminates the need for a spare rotor as well as transport costs for workshop maintenance. All compressor blades are replaceable without rotor de-stack or lift. 



    Fuel flexibility matters

    The SGT6-8000H gas turbines are capable of firing a wide range of fuel gas, and fuel oil; as well as a wide range of non-standard fuels like LNG, syngas, low-calorific gases (low-BTU gases), naphta, condensate and others.



    Designed to meet stringent environmental requirements

    The SGT6-8000H gas turbine uses the can annular combustion system to successfully run in base and part-load operation while still complying with NOX and CO regulations.


    NOX emissions: ≤ 25 ppmvd on fuel gas (without water injection, at 15%O2)

    NOX emissions: ≤ 42 ppmvd on fuel oil (with water injection, at 15%O2)

    Technical data

    Technical data for the SGT6-8000H

    Performance data for simple cycle power generation

    Download table as: PDF Excel
    Power output
    310 MW
    Fuel (examples) Natural gas, LNG, sour gases, distillate oil, biodiesel, Arabian Super Light crude oil (ASL), kerosene, jet fuel, condensate. Other fuels on request
    Frequency 60 Hz
    Gross efficiency > 40%
    Heat rate < 9,000 kJ/kWh (< 8,530 Btu/kWh)
    Turbine speed 3,600 rpm
    Pressure ratio 21.0 : 1
    Exhaust mass flow 650 kg/s (1,433 lb/s)
    Exhaust temperature 645°C (1,193°F)
    NOₓ emissions ≤ 25 ppmvd at 15% O₂ on fuel gas (without water injection for NOₓ control), ≤ 42 ppmvd at 15% O₂ on fuel oil (with water injection for NOₓ control)

    NOₓ emissions at 15% O₂ at ISO ambient conditions.

    SCC6-8000H: Performance data for combined cycle power plant

    Download table as: PDF Excel
    Siemens combined cycle power plant
    SCC6-8000H 1S / 1x1
    SCC6-8000H 2x1
    SCC6-8000H 3x1
    Net plant power output 460 MW 930 MW 1,390 MW
    Net plant efficiency 61% 61% 61%
    Net heat rate 5,920 kJ/kWh (5,611 Btu/kWh) 5,910 kJ/kWh (5,602 Btu/kWh) 5,910 kJ/kWh (5,602 Btu/kWh)
    Number of gas turbines 1 2 3
    Pressure/reheat Triple/Yes Triple/Yes Triple/Yes

    Physical dimensions and weight

    Download table as: PDF Excel
    Core engine
    Approx. weight 289,000 kg (637,000 lb)
    Length 10.5 m (34 ft)
    Width 4.3 m (14 ft)
    Height 4.3 m (14 ft)

    The SGT6-8000H is suitable for the following applications and industries:


    SGT6-8000H videos

    SGT6-8000H videos

    Learn how the SGT6-8000H package can be constructed onsite in only 16 weeks.

    Or watch our video about the Dangjin III combined cycle power plant, powered by the first SGT6-8000H in Asia.

    Interactive VR experience

    Explore the SGT-8000H series in virtual reality

    Downloads and support

    Find out more about our gas turbine offerings

    In our download section, you can find brochures, technical papers, and more. Or you can contact us directly for specific inquiries.

    For more information, please contact our Customer Support Center.

    Siemens AG
    Freyeslebenstrasse 1
    91058 Erlangen

    (Charges depending on provider)
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    and from the German mobile phone networks
    max. € 0.42/min.)


    Proven in commercial operation: SGT6-8000H reference highlights

    Around 60 Siemens H-class turbines in commercial operation, with about 750,000 fired fleet hours.  Overall, more than 85 units are under contract.


    Reference map



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