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Introduction
GH4033 Superalloy (GH33 / Ni-Cr Base Precipitation-Hardening Alloy) is a nickel‑chromium based wrought superalloy strengthened by γ′ [Ni₃(Al,Ti)] precipitates formed through aluminum and titanium additions. The alloy contains approximately 68% nickel, 19–22% chromium, 2.4–2.8% titanium, 0.6–1.0% aluminum, and trace amounts of boron, cerium, and carbon. This GH4033 nickel base superalloy delivers sufficient high-temperature strength at 700–750°C (1290–1380°F) and good oxidation resistance below 900°C (1650°F), with excellent cold and hot workability. Its precipitation hardened alloy characteristics—combined with a proven service history in aircraft engine turbine blades—make it the preferred material for aero-engine turbine blades, turbine discs, combustion chambers, gas turbine components, industrial furnace equipment, and petrochemical industry applications. Available in a full range of product forms including GH4033 round bar, plate, sheet, pipe, tube, wire, and forgings.
Chemical components（%）
Composition | C | Si | Mg | P | S | Cr | Ti | Ni | Mo | Al | Cu | Nb |
Min | \ | \ | \ | \ | \ | 19.00 | 0.60 | 55.00 | 9.00 | 2.00 | \ | \ |
Max | 0.05 | 0.50 | 0.015 | 0.015 | 0.015 | 22.00 | 1.20 | 59.00 | 10.00 | 2.50 | 0.03 | 0.03 |
Mechanical properties
Rigidity | Tensile strength | Yield strength | Elongation |
≤310 | ≥960MPa | ≥670MPa | ≥15% |
Physical properties
Density | Melting points | Specific heat | Magnetism | Resistivity | Thermal conductivity | Linear expansivity |
8.19g/cm3 | 1345-1380℃ | 377J/(Kg.℃） | \ | 1.33μΩ·m(20℃) | 11.8W/(m.k)(100℃) | 11.27×10-6/K(20-100℃) |
GH4033 Superalloy Available Products and Standard
1. GB/T 14992 (Superalloys – Classification and Specifications)
Grade: GH4033 / GH33
Type: Round Bar / Sheet / Plate / Strip / Wire / Forgings
Size Range:
GH4033 Wire: 0.1 – 15.0 mm dia
GH4033 Strip: 0.05 – 5.0 mm thick × 5 – 500 mm wide
GH4033 Round Bar: 8 – 355 mm dia
GH4033 Sheet / Plate: 0.5 – 180 mm thick
Surface: Annealed, Bright, Pickled, Ground
Testing: Chemical analysis, mechanical test (tensile strength, yield strength, elongation), hardness test, high-temperature stress rupture test, age hardening response test, dimensional inspection
2. ASTM B637 (Standard Specification for Precipitation Hardening Nickel Alloy Bar, Rod, Wire, and Forgings)
Grade: UNS N07080 / GH4033 / Nimonic 80A equivalent
Type: Round Bar / Rod / Wire / Forging / Ring
Size Range:
GH4033 Round Bar: 8 – 355 mm dia (hot rolled or cold drawn)
GH4033 Wire: 0.1 – 15.0 mm dia (coils or straight)
GH4033 Forging / Ring: Custom sizes available
Surface: Annealed, Pickled, Ground, Turned, Bright
Testing: Chemical analysis, mechanical test (tensile, yield, elongation), hardness test, age hardening test, stress rupture test, ultrasonic test, dimensional inspection
Applications
1. Aero-Engine Turbine Blades & Turbine Discs
For aero-engine turbine blades operating at 700–750°C (1290–1380°F), GH4033 round bar provides high-temperature strength and creep resistance where other alloys would soften under sustained centrifugal loading.
For turbine discs and compressor discs in aircraft engines, the precipitation-hardened structure of GH4033 superalloy maintains mechanical integrity at elevated temperatures, ensuring reliable performance through thousands of flight hours.
For combustion chambers and jet pipes requiring resistance to thermal cycling and oxidation, GH4033 sheet and plate deliver excellent formability combined with oxidation resistance up to 900°C (1650°F).
For high-temperature fasteners and structural components in aero-engines, GH4033 forged bar provides the combination of high strength and thermal stability required for critical rotating components.
2. Gas Turbines & Power Generation
For industrial gas turbine blades and vanes operating in high-temperature environments, GH4033 alloy delivers the high-temperature strength and oxidation resistance needed for reliable power generation service.
For combustor components and transition ducts in gas turbines, GH4033 plate and sheet withstand flame impingement and hot gas erosion with good oxidation resistance below 900°C.
For turbine casing fasteners, seals, and structural members requiring dimensional stability under load, GH4033 bar offers excellent relaxation resistance and thermal stability through extended service intervals.
3. Petrochemical Industry & Industrial Furnaces
For high-temperature reactors, heat exchangers, and process piping handling aggressive hydrocarbon streams, GH4033 pipe and tube resist oxidation and maintain mechanical integrity at elevated temperatures.
For furnace rollers, radiant tubes, and heating elements in industrial heat treatment furnaces, GH4033 superalloy provides good thermal stability and oxidation resistance in demanding high-temperature environments.
For valve stems, pump shafts, and high-temperature fasteners in refinery and petrochemical equipment, GH4033 round bar offers corrosion resistance combined with high-temperature strength.
4. Nuclear Industry & Marine Engineering
For nuclear reactor structural components and fasteners requiring resistance to high-temperature water corrosion and radiation stability, GH4033 nickel alloy provides reliable performance in demanding nuclear environments.
For marine engineering applications including high-temperature exhaust systems and offshore structural components, GH4033 alloy offers corrosion resistance combined with high-temperature stability.
FAQ – GH4033 Superalloy
Q: What is the equivalent material for GH4033?
A: GH4033 corresponds to GH33 (Chinese designation), ЭИ437Б (Russian designation), and is similar to Nimonic 80A in terms of base composition and application. It is a Ni-Cr base precipitation-hardening wrought superalloy that has been widely used in Chinese aero-engine turbine blade applications since the 1950s.
Q: What is the maximum operating temperature for GH4033?
A: GH4033 is suitable for continuous service up to 750°C (1380°F) with sufficient high-temperature strength. It offers good oxidation resistance below 900°C (1650°F). For service above 750°C, other superalloys such as GH4169 or Inconel 718 are recommended.
Q: What is the difference between GH4033 and GH4169 (Inconel 718)?
A: GH4033 is a Ni-Cr base precipitation-hardening alloy strengthened by γ′ (Ni₃(Al,Ti)) precipitates, optimized for service up to 750°C (1380°F). GH4169 (Inconel 718) is strengthened by γ″ (Ni₃Nb) precipitates, offering higher tensile strength (up to 1200 MPa) and better weldability for complex fabricated structures. GH4033 has a proven history in turbine blade applications, while GH4169 is more commonly used for turbine discs and welded assemblies.
Q: What are the typical applications for GH4033?
A: Aerospace (aero-engine turbine blades, turbine discs, combustion chambers, jet pipes, high-temperature fasteners); gas turbines and power generation (turbine blades, combustor components, seals, fasteners); petrochemical industry (reactors, heat exchangers, furnace components, valve stems, pump shafts); nuclear industry (structural components, fasteners); and industrial furnaces (radiant tubes, heating elements, furnace rollers).
We are a trusted GH4033 Supplier and GH4033 Manufacturer, China‑based, serving aerospace manufacturers, gas turbine builders, petrochemical equipment fabricators, and power generation contractors worldwide. All products comply with GB/T 14992 / GB/T 14993 / GJB 1953A with full mill test certificates, PMI verification, and dimensional inspection reports. We offer GH4033 round bar, plate, sheet, pipe, tube, wire, welding wire, forgings, flanges, and fasteners in custom sizes, with cut‑to‑length, precision machining, forging, and heat treatment services. Hot rolled, cold rolled, bright drawn, and precision ground options available. Contact us at info@monokj.com for size chart, pricing, or custom requirements.
