In the high-temperature core region of a gas turbine, components such as the combustion chamber lining, heat shield, and exhaust pipes face harsh thermal environments. For engineers and procurement managers, the primary pain point lies in the risk of material failure:
Thermal creep deformation: At constant temperatures of 650°C to 700°C, standard alloys can soften and warp, leading to assembly interference and system failure.
Scale: Inferior materials can form a brittle, easily flaking oxide layer (scale), potentially damaging downstream high-speed turbine blades.
Alternative compliance: Using "commercial-grade" materials that do not meet stringent aerospace-grade certification standards.
Our GH4169 (equivalent to Inconel 718) sheet metal, specifically designed using a VIM+VAR (double vacuum melting) process, eliminates these risks, ensuring the absolute structural integrity of your energy infrastructure.
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Supply Guidelines for Steel Sheets for GH4169 (Inconel 718) Combustion Chamber Lining
Supply Guidelines for Steel Sheets for GH4169 (Inconel 718) Combustion Chamber Lining
The supply guidelines for GH4169 (equivalent to Inconel 718) steel plates used for combustion chamber linings emphasize their high-temperature strength, excellent oxidation resistance, and superior weldability to withstand rapid temperature changes and high thermal stress. These plates are typically supplied in a solution-annealed condition for ease of processing, followed by age hardening to achieve maximum strength. Key specifications include compliance with ASTM B670/B637 or AMS 5662/5663 standards.
What is the material code for INCONEL 718?
UNS N07718
INCONEL Alloy 718 (UNS N07718/W.Nr. 2.4668) is a high-strength, corrosion-resistant nickel-chromium alloy with a service temperature range of -423°F to 1300°F. This age-hardening alloy is easy to machine, allowing for the manufacture of even complex parts.
1. Specifications Of high temperature Alloy GH4169 Plates
| Standards | ASTM B670 / ASME SB670 |
| Dimensions | ASTM, ASME, and API |
| Inconel 718 Plate Width Range | 30" to 240" |
| Sheets Plates Thickness | 7 gauge to 28 gauge or 3.664mm to .321mm |
| Inconel 718 Plate Length Range | Up to144" Non-Standard or Longer Lengths Available Upon Request |
| Value added services | Cladding, Heat Treatment, Annealed, Pickling, Polish, Rolling, Cutting, Bending, Forging, Minor Fabrication Etc. |
| Hardness | Half Hard, Quarter Hard, Soft, Hard, Spring Hard |
| Form | Coils, Foils, Rolls, Strip, Flats, Blank (Circle), Ring (Flange) |
2. Chemical Composition of GH4169 Alloy sheet
| C | Mn | P | S | Si | Cr | Ni | Mo | Cb | Ta | Ti | Al | Co | B | Cu |
| 0.08 | 0.35 | 0.015 | 0.015 | 0.35 | 17-21 | 50-55 | 2.8-3.30 | 4.75-5.50 | 0.05 | 0.65-1.15 | 0.20-0.80 | 1.00 | 0.006 | 0.30 |
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3. GH4169 gas turbine plate operating performance
| Property (at 650°C / 1200°F) | GH4169 Plate Performance | Industrial Benefit |
| Yield Strength (σp0.2) | ≥ 850 MPa | Prevents liner warpage & deformation. |
| Tensile Strength (σb) | ≥ 1000 MPa | High safety factor under pressure. |
| Oxidation Rate | ≤ 0.05 mm/year | Zero Scaling protects turbine blades. |
| Weldability | Superior (Delayed Aging) | Crack-free assembly for complex ducting. |
4. alloy GH4169 Plate Sizes
|
Stocked Sizes |
|
|---|---|
|
Size (in inches) |
Size (in mm) |
|
.125" |
3.18mm |
|
.134" |
3.40mm |
|
.156" |
3.96mm |
|
.187" |
4.75mm |
|
.250" |
6.35mm |
|
.312" |
7.92mm |
|
.375" |
9.53mm |
|
.500" |
12.7mm |
|
.600" |
15.9mm |
|
.750" |
19.1mm |
|
.875" |
22.2mm |
|
1" |
25.4mm |
|
1.125" |
28.6mm |
|
1.250" |
31.8mm |
|
1.500" |
38.1mm |
|
1.750" |
44.5mm |
|
2" |
50.8mm |
|
2.500" |
63.5mm |
|
3" |
76.2mm |
5. GH4169 Alloy Sheet Applications
Our high-strength GH4169 sheet powers the world's most advanced turbines:
Combustion chamber lining: Excellent resistance to thermal fatigue.
Exhaust ducts and manifolds: Maintain structural stability under temperature fluctuations.
Fasteners and structural rings: High-strength structural components for turbine housings.
Cryogenic components: Remains resilient at -253°C, suitable for special gas storage applications.
Contact us now to get the latest export price for GH4169 in 2026
Why choose to source GH4169 from Gnee Steel's Tier 1 plant?
As a Reliable Supplier and specialized manufacturer, we provide the commercial edge your project demands:
✅️High Purity VIM + VAR Melting: Our double-vacuum melting process removes non-metallic inclusions and "freckles," maximizing the fatigue life of your parts.
✅️Precision Cut-to-Size Services: We utilize high-precision Laser and Waterjet cutting to deliver blanks ready for your production line, reducing your material waste.
✅️Global Compliance: Every order is delivered with a full MTC 3.1 Traceability report, ensuring your project passes all third-party audits (SGS/TUV).
✅️Wholesale Inventory: We maintain a massive stock of thicknesses (0.5mm to 50mm) ready for Immediate Dispatch.
Gnee Steel GH4169 Plate certificate
Contact us for a quote on high-performance GH4169 tubing!
Stop paying exorbitant prices for Western brands. We can offer you the same aerospace-grade GH4169 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]
WhatsApp/WeChat: +86 15824687445
Website: [https://www.china-plate-steel.com/]
FAQ
Q1: Is GH4169 identical to Inconel 718 plate?
A: Yes. GH4169 is the technical designation used in Chinese GB standards (GB/T 14992) for the exact same metallurgical system as Inconel 718 (UNS N07718). It is globally interchangeable and meets AMS 5596 standards.
Q2: How do you ensure the flatness of large-format plates?
A: We use advanced Precision Leveling machines after the solution-annealing stage to guarantee "Dead Flat" sheets, essential for automated laser cutting and robot welding.
Q3: Can you provide GH4141 (Rene 41) if the temperature exceeds 700°C?
A: Absolutely. While GH4169 is the best choice for up to 700°C, we also supply GH4141 and GH3128 for even higher temperature requirements in extreme gas turbine zones.
Q4: Do you offer bulk discounts for major energy infrastructure overhauls?
A: Yes. As a direct Tier-1 Manufacturer, we offer tiered Wholesale Pricing and dedicated project management for large-tonnage procurement.