There are significant challenges in the combustion chamber liner, a core component of aero engines. For engineers and purchasing managers, the main pain points lie in material failures during manufacturing and use:
Forming cracks: The geometry of the combustion chamber liner is complex. Low-ductility alloys are prone to cracking during deep drawing or power spinning, leading to high scrap rates.
Surgical fatigue (SAC): Continuous heating and cooling cycles generate intense localized stresses, causing premature cracking at cooling holes and welds.
Oxide scale: Surface degradation thins the walls of precision parts, compromising structural integrity.
Our aerospace-grade GH3030 is designed to solve these challenges. As a Tier 1 supplier, Gnee Alloy can provide the plasticity and purity required for your flight safety components.
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Nickel alloy for combustion chamber lining of aerospace-grade GH3030
Gnee Alloy
Nickel alloy for combustion chamber lining of aerospace-grade GH3030
GH3030 is a solid solution strengthened nickel-chromium superalloy (containing approximately 80% Ni and 20% Cr) used for aerospace combustion chamber linings. It exhibits excellent oxidation resistance and thermal fatigue performance up to 1100°C, and maintains good mechanical properties under loads below 800°C.
Gnee Alloy
What is GH3030 material?
GH3030 is a high-temperature nickel-based superalloy primarily used in components requiring high oxidation resistance and thermal stability. Due to its excellent performance in high-temperature environments, GH3030 is widely used in the aerospace and power generation industries.
1. GH3030 Global Equivalent Standard
| Region / Country | Equivalent Standard / Grade |
|---|---|
| China | GB/T 14992 / GB/T 15062 – GH3030 |
| UK / USA | Nimonic 75 / UNS N06075 / Alloy 75 |
| Russia | XH78T / EI435 (ЭИ435) |
| Europe | W.Nr. 2.4951 / NiCr20Ti |
2. Chemical composition of GH3030 alloy for aircraft combustion chamber lining
| Element | Content (%) | Notes |
|---|---|---|
| Nickel (Ni) | Balance (≥ 75.0) | Matrix element; provides high-temperature stability |
| Chromium (Cr) | 19.0 – 22.0 | Provides oxidation and corrosion resistance |
| Iron (Fe) | ≤ 1.0 | Tube specification requires ≤1.0% (stricter than bar/plate) |
| Titanium (Ti) | 0.15 – 0.35 | Supplementary solid-solution strengthening |
| Aluminum (Al) | ≤ 0.15 | Residual element; strictly limited |
| Carbon (C) | ≤ 0.12 | Ensures good weldability and workability |
| Manganese (Mn) | ≤ 0.70 | Deoxidizer |
| Silicon (Si) | ≤ 0.80 | Deoxidizer |
| Phosphorus (P) | ≤ 0.015 | Tube specification requires ≤0.015%; ensures toughness |
| Sulfur (S) | ≤ 0.010 | Tube specification requires ≤0.010%; ensures hot workability |
| Copper (Cu) | ≤ 0.007 | Tube specification has stricter Cu limit (≤0.007%) |
3. Mechanical properties of GH3030 alloy (solution treated state)
| Property | Value at 20°C | Value at 800°C (1472°F) | Industrial Advantage |
| Tensile Strength (σb) | ≥ 590 MPa | ≥ 140 MPa | Elite high-temp load support. |
| Yield Strength (σp0.2) | ≥ 245 MPa | ≥ 100 MPa | Resists distortion at peak heat. |
| Elongation (δ5) | ≥ 35% (Peak 45%) | ≥ 50% | Zero Cracking during forming. |
| Hardness (HB) | 130 - 180 | - | Optimized for CNC Machining. |
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4. Gnee Alloy GH3030 Core Advantages
The most outstanding feature of our GH3030 (equivalent to Nimonic 75 / Alloy 75) is its superior formability. Through a special cold rolling and annealing process, we achieve:
Elongation (δ5) ≥ 35%: This exceptional ductility enables high draw ratios and complex spinning processes without frequent intermediate annealing.
Uniform Grain Structure: We guarantee grain size to ASTM E112 Grade 8 or finer, ensuring consistent performance during stamping and welding, thus reducing your custom machining costs.
5. GH3030 Industrial Applications
As a reliable supplier, Gnee Alloy provides the following services to aerospace original equipment manufacturers (OEMs) and service centers worldwide:
Combustion Chamber Liners: Forged and sheet-metal liners handling 700°C-900°C gas.
Flame Tubes & Afterburners: Providing high Industrial Durability against cyclic heat.
Exhaust Ducting: Precision seamless tubing and sheets for manifolds.
High-Temp Gaskets: Stable structural rings and seals.
Why Source From a Tier-1 Manufacturer? (Commercial Value)
✅️Direct Factory Pricing: Skip the middleman markups and secure the best wholesale rates for bulk aviation projects.
✅️MTC 3.1 Traceability: Full heat-analysis and mechanical verification certificates included with every shipment.
✅️Wholesale Inventory: We maintain a large stock of 0.5mm to 3.0mm sheets and Sch 10/40 pipes ready for Fast Global Shipping.
✅️100% NDT Inspection: Every aerospace order is Ultrasonic (UT) and Eddy Current tested to ensure Zero Defect internal integrity.
Gnee Alloy GH3030 certificate
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FAQ
Q1: How do you prevent "Thermal Fatigue" in your GH3030 sheets?
A: Thermal fatigue resistance is tied to material purity and grain stability. Our VIM+ESR process removes trace Phosphorus and Sulfur (≤0.010%), preventing the grain-boundary embrittlement that triggers fatigue cracks during engine operation.
Q2: Is GH3030 easier to weld than GH4169 (718)?
A: Yes. GH3030 is a solid-solution strengthened alloy with a very slow aging response. It is notoriously easy to weld without the risk of "Strain-Age Cracking," making it the most Cost-effective Solution for complex welded assemblies.
Q3: Can I get h9 tolerance precision tubes in GH3030?
A: Absolutely. We offer Precision Ground seamless tubing for fuel sensors and actuators with tolerances as tight as h8-h11 and a mirror BA finish.
Q4: Do you support small trial orders for aircraft prototype development?
A: Yes. As a Tier 1 supplier, Gnee Alloy supports innovation. We offer flexible minimum order quantities (MOQs) for standard inventory to help your R&D projects achieve certification faster.
