Combustion chamber liners are among the most stressed components in an aero-engine. Operating at sustained high temperatures, these liners face two devastating failure modes:
Thermal fatigue cracking: Repeated engine start-stop cycles generate strong temperature gradients, leading to microcracks that compromise structural integrity.
Scale buildup: At temperatures up to 800°C, inferior alloys can form loose scale that flakes off, thinning the liners and potentially damaging downstream turbine blades.
Our aerospace-grade GH3030 sheet metal is specifically designed to address these challenges. GH3030 is the base high-temperature alloy for flame tubes and liners, providing the reliability your engine design requires.
Request a GH3030 price list and AS9100 compliance documents immediately
Guide to GH3030 high-temperature alloy for combustion chamber lining
Guide to GH3030 high-temperature alloy for combustion chamber lining
GH3030 sheet is a nickel-based solid solution strengthened high-temperature alloy sheet (containing approximately 80% nickel and 20% chromium), widely used in sheet metal processing in the aerospace and industrial fields, especially suitable for combustion chamber linings. It is highly praised for its excellent oxidation resistance, thermal fatigue performance, and superior welding/stamping properties.
What is alloy 75 material?
nickel-chromium alloy
NIMONIC alloy 75 (UNS N06075/W.Nr. 2.4951 & 2.4630) is an 80/20 nickel-chromium alloy with controlled additions of titanium and carbon.
Common Product Forms of GH3030
This alloy is supplied in various forms, including cold-rolled sheets, bars, and tubes, with thicknesses typically ranging from 0.08 mm to 200 mm.
GH3030 alloy plate technical performance
Our GH3030 material retains its single-phase austenitic structure, ensuring excellent ductility and stability even after thousands of hours of flight.
| Property | GH3030 Performance | Benefit to Combustion Liner |
| Max Service Temp | 800°C - 900°C | Resists localized hot spots and thermal distortion. |
| Oxidation Rate | ≤ 0.05 mm/year (at 800°C) | Zero Scaling prevents part thinning and downstream damage. |
| Weldability | Superior (TIG/Plasma) | Crack-free assembly for complex flame tube shapes. |
| Fatigue Life | High Thermal Fatigue Strength | Extends MTBO (Mean Time Between Overhaul). |
GH3030 - UNS GH30 / XH78T High Temperature Alloy Chemical Composition
| C | Cr | Ni | Ti | Al | Fe | Mn | Si | P | S | Cu |
| ≤0.12 | 19.0-22.0 | Bal. | 0.15-0.35 | ≤0.15 | ≤1.5 | ≤0.7 | ≤0.8 | ≤0.02 | ≤0.02 | ≤0.20 |
Mechanical strength of GH3030 high-temperature alloy plate at high temperatures
| Value | |
|---|---|
| Tensile Strength (σb) at 800°C | ≥ 140 MPa |
| Yield Strength (σp0.2) at 800°C | ≥ 100 MPa |
| Elongation (δ5) at 800°C | ≥ 50% |
Click to download the GH3030 alloy PDF file now
High-purity manufacturing of GH3030 plates: Advantages of VIM + ESR
In the aerospace sector, material purity is the difference between mission success and catastrophic failure. We eliminate trace impurities (like Phosphorus and Sulfur) that trigger fatigue cracks by utilizing a dual-refining process:
VIM + ESR process
VIM (Vacuum Induction Melting): Ensures precise elemental control and removes dissolved gases.
ESR (Electroslag Remelting): Refines the grain structure and removes non-metallic inclusions, significantly extending the Material Life Cycle under thermal cycling.
Result: A GH3030 sheet with guaranteed grain size (Level 5 or finer) that offers maximum plasticity and crack resistance during deep drawing and welding.
Advantages of GH3030 over other materials
GH3030 is commonly used in combustion chambers as a direct upgrade to 310S stainless steel. It exhibits superior resistance to thermal fatigue and creep deformation, and its service life is typically 2-4 times that of 310S.
Inquire for Aerospace-Grade GH3030 Sheets & Fast Quote
Why choose to source GH3030 from Gnee Steel?
As a Tier-1 Supplier to the global aerospace industry, we provide more than just metal; we provide total Quality Assurance:
✅️AS9100 & ISO 9001 Certified: Full compliance with the most rigorous aerospace management standards.
✅️Precision Rolling: We offer thicknesses from 0.5mm to 3.0mm with ultra-tight tolerances for weight-sensitive designs.
✅️Full Traceability: Every sheet is delivered with a complete 3.1 Mill Test Certificate (MTC) detailing heat analysis and grain size.
✅️Wholesale Pricing: Benefit from Direct Factory Pricing and a massive In-Stock Inventory for Fast Global Shipping.
Gnee Steel GH3030 Certificate
📦 Packaging and Shipping
All Nickel Based Alloy products are packaged using the following methods:
Wooden pallets or crates
Moisture-proof packaging
Labels with furnace number, standard, and size labels
Shipped worldwide by sea, air, or express
Contact us for the latest export price quote for GH3030 Alloy
FAQ
Q1: Can GH3030 handle 1000°C hotspots?
A: Yes, GH3030 can withstand localized hotspots up to 1000°C for short durations without melting. However, if your design requires continuous service at 950°C+, we recommend an upgrade to GH3128 or GH3044 for superior high-temp strength.
Q2: What is the recommended surface finish for combustion liners?
A: We recommend a Bright Annealed or Pickled finish. Our sheets feature a roughness of Ra ≤ 0.8μm, which is ideal for subsequent thermal barrier coating (TBC) applications.
Q3: How do you guarantee the fatigue life of the sheets?
A: Fatigue resistance is highly dependent on grain size and purity. By using ESR refining and controlled solution treatment, we guarantee a uniform grain structure that resists crack initiation.
Q4: Do you offer custom laser cutting for complex liner shapes?
A: Absolutely. We provide Custom Fabrication services, including high-precision laser cutting based on your CAD drawings, saving you time in your assembly line.
