Material selection is never easy in the high-stakes design of aerospace combustor and afterburner liners. A core challenge for every engineer lies in the trade-off between manufacturing processes and performance: "Should I choose a material that is easy to form into complex shapes, or one with superior resistance to thermal fatigue to extend engine on-wing time?"
Gnee Steel, a leading manufacturer specializing in aerospace-grade high-temperature alloys, can provide expert consultation to help you understand the nuances between GH3030 and GH3039. Both are solid-solution strengthened nickel-based alloys, but their performance ranges determine their ideal applications.
Contact us to obtain the GH3030 technology selection guide and samples
GH3030 and GH3039 steel plates: the best alloys for combustion chamber linings
GH3030 and GH3039 steel plates: the best alloys for combustion chamber linings
Both GH3030 and GH3039 are nickel-based solid solution strengthened superalloys designed for high-temperature applications, particularly suitable for aerospace combustion chamber linings, with operating temperatures up to 800-850°C (short-term exposure temperatures up to 1100°C). Although they are often used interchangeably, GH3039 generally outperforms GH3030 due to its higher nickel content and better oxidation and thermal fatigue resistance.
What is GH3039 material?
GH3039 is a high-temperature alloy, also known as Inconel 713C. It is a nickel-based high-temperature alloy with excellent high-temperature strength, oxidation resistance, and creep resistance.
1.GH3030 Steel Plate (NiCr20 / XH78T)
Characteristics: An early-developed 80Ni-20Cr type alloy, renowned for its simple chemical composition, stable microstructure, and low aging properties. It exhibits excellent oxidation resistance and high plasticity below 800℃.
Weldability: Good weldability and machinability make it widely used in manufacturing.
Applications: Ideal for combustion chamber components, afterburners, and other high-temperature components requiring high oxidation resistance and good weldability.
Combustion chamber lining
2.GH3039 Steel Plate (NiCr20AlTi)
Characteristics: A modified high-temperature alloy based on the Ni-Cr system, with higher thermal strength than GH3030 due to the addition of elements.
Advantages: Excellent creep resistance and high-temperature oxidation resistance compared to standard austenitic stainless steel.
Applications: Widely used in the aerospace industry for manufacturing combustion chamber and afterburner components operating under high heat loads, as well as other high-temperature structural components.
Aerospace afterburner components
3. Applications of GH3030 and GH3039 Alloy Plates
GH3030 Plate: If your bushing geometry is complex, including sharp bends or deep-drawn sections, GH3030 is the "king of forming." Its superior plasticity minimizes scrap rates during production.
GH3039 Alloy Plate: If your parts need to withstand intense and rapid thermal cycling up to 850°C, GH3039 is the "upgrade option." Its more stable matrix design effectively resists microcracks, thus preventing premature bushing failure.
Contact our professionals to recommend alloys suitable for your project
4. Technical Comparison: GH3030 vs. GH3039
Chemical Composition Comparison (Weight %)
| Element | GH3030 (The Workhorse) | GH3039 (The Specialized Evolution) |
| Nickel (Ni) | Balance (~80.0%) | Balance (~75-78%) |
| Chromium (Cr) | 19.0 - 22.0% | 19.0 - 22.0% |
| Titanium (Ti) | 0.15 - 0.35% | 0.35 - 0.75% |
| Aluminum (Al) | ≤ 0.15% | 0.35 - 0.75% |
| Niobium (Nb) / Mo | - | 1.8 - 2.2% (Nb+Mo) |
Both alloys utilize a high-nickel matrix and approximately 20% Chromium to provide excellent Oxidation Resistance up to 800°C. They both feature excellent Weldability (TIG, MIG, and resistance welding).
Mechanical Properties (Solution Treated Condition)
| Property | GH3030 Plate | GH3039 Plate |
| Tensile Strength (σbσb) | ≥ 735 MPa | ≥ 700 - 850 MPa |
| Yield Strength (σ0.2σ0.2) | ≥ 245 MPa | ≥ 300 MPa |
| Elongation (δ5δ5) | ≥ 35% (Exceptional) | ≥ 30% (Very Good) |
| Max Service Temp | 800°C | 850°C |
Click to download the GH3030 alloy PDF file now
5. How to choose between GH3030 and GH3039?
Choose GH3030 If: You are producing complex, thin-walled components (0.5mm - 4.0mm cold-rolled sheets) that require extensive cold-working, stamping, or deep drawing. It is the most Cost-Effective Solution for high-volume, complex-geometry production.
Choose GH3039 If: Your application involves higher mechanical loads or more aggressive thermal cycling. The addition of Al, Ti, and Nb in GH3039 provides better creep resistance and Thermal Fatigue Resistance, making it ideal for the "hot section" of advanced gas turbines.
Please request a price quote for GH3030 sheet metal
6.GH3030 vs GH3039: Key Differences
| Feature | GH3030 (Ni80Cr20) | GH3039 (NiCr22MoNb) |
|---|---|---|
| Primary Base | Nickel-Chromium (80Ni – 20Cr) | Nickel-Chromium (> 50Ni) |
| Max Working Temp | 800°C (up to 1100°C oxidation) | 800°C–850°C (1000°C oxid.) |
| Strength | Satisfactory below 800°C | Higher strength at >800°C |
| Thermal Fatigue | Good | Excellent |
| Main Usage | Combustor components (<800°C) | Combustor & Afterburner (<850°C) |
Contact us now to get the latest export price for GH3030 in 2026
Contact us for a quote on high-performance GH3030 tubing!
Stop paying exorbitant prices for Western brands. We can offer you the same aerospace-grade GH3030 superalloy tubing at a lower price. Our team is ready to provide you with a rapid quote (RFQ) within 12 hours.
Email: [ru@gneesteelgroup.com]
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FAQ
Q1: Which alloy has better weldability for combustion liner repairs?
A: Both exhibit excellent Weldability. However, GH3030 is slightly more forgiving during manual welding due to its higher ductility. GH3039 requires more precise control over the heat-affected zone (HAZ) to maintain its fatigue properties.
Q2: Can GH3039 be used as a direct "upgrade" for GH3030?
A: In terms of temperature and fatigue, yes. However, your tooling must be able to handle the slightly higher yield strength of GH3039. We recommend Expert Advice before performing a full Material Selection switch.
Q3: What is the typical surface finish for these aerospace plates?
A: Our cold-rolled sheets are typically delivered in Bright Annealed (BA) or Annealed & Pickled (AP) condition. The BA finish is preferred for aerospace applications to prevent carbon buildup during engine operation.
Q4: Do you provide Technical Datasheets for these grades?
A: Absolutely. Every order is accompanied by a full Material Test Certificate (EN 10204 3.1) and we can provide detailed Technical Datasheets upon request.
