For engineers and purchasing managers in the aerospace and energy industries, sourcing large-size GH4169 nickel alloy sheets (equivalent to Inconel 718) presents numerous technical risks. The most common industrial challenges include:
Poor flatness: Warping or bending of the sheet can cause collisions with automated CNC vacuum chucks and laser cutting heads.
Material waste: Purchasing standard-sized sheet for small, complex parts results in high costs and excessive scrap.
Surface integrity: Scratches and dents on "commercial-grade" sheet can affect the industrial durability of combustion chamber linings.
At Gnee Steel, we eliminate these risks. As a specialized supplier, we offer precision-leveled GH4169 sheet and professional custom-sized cutting services based on your specific drawings.
Request Today's GH4169 Plate Stock List & Wholesale Pricing
ALLOY STEEL GH4169 PLATE Suppliers Factory
ALLOY STEEL GH4169 PLATE Suppliers Factory
GH4169 alloy sheet is a high-strength nickel-based precipitation-hardening superalloy sheet (equivalent to Inconel 718), renowned for its excellent corrosion resistance, high tensile strength, and fatigue resistance below 650°C. It is widely used in the manufacture of high-temperature structural components in aerospace, gas turbine, and nuclear engineering fields.
What is GH4169 equivalent to?
Inconel 718
GH4169 (equivalent to the American brand Inconel 718) is a precipitation-hardening nickel-based superalloy widely used in the aerospace industry due to its excellent mechanical properties (Lu et al., 2014).
1. Chemical composition (%) of GH4169 sheet
| Ni | Cr | Nb (Niobium) | Mo | Ti | Al | P/S |
| 50-55% | 17-21% | 4.75-5.50% | 2.8-3.3% | 0.65-1.15% | 0.20-0.80% | ≤0.010% |
Click to download the GH4169 alloy PDF file now
2. GH4169 Material Specifications
| Feature | Cold Rolled Sheet | Hot Rolled Plate | Commercial Advantage |
| Thickness Range | 0.5 mm - 4.0 mm | 4.0 mm - 50.0 mm | Comprehensive size coverage. |
| Standard | AMS 5596 / AMS 5597 | ASTM B670 / SB670 | Global engineering compliance. |
| Surface Finish | Bright Annealed (BA) | Pickled (No.1) / Sandblasted | Optimized for coating or welding. |
| Supply State | Solution Treated | Solution or Fully Aged | Ready for your production line. |
3. Mechanical properties of GH4169 alloy plate (typical fully aged state)
These values represent the peak performance of the material after our specialized double-aging heat treatment.
| Temperature (℃/°F) | Yield Strength (0.2% MPa) | Tensile Strength (MPa) | Elongation (δ5 %) | Hardness (HRC) |
| 20°C (Room Temp) | ≥ 1030 | ≥ 1240 | ≥ 12 | 36 - 44 |
| 650°C (1200°F) | ≥ 850 | ≥ 1000 | ≥ 15 | - |
| 700°C (1292°F) | ≥ 750 | ≥ 950 | ≥ 18 | - |
4. Common dimensions of GH4169 alloy plate
Standard Thickness Range
| Type | Thickness (mm) | Thickness (inches) | Tolerance |
|---|---|---|---|
| Thin Plate / Sheet | 0.5 – 4.0 | 0.020 – 0.156 | ±0.05 – ±0.10 mm |
| Medium Plate | 4.0 – 20.0 | 0.156 – 0.787 | ±0.10 – ±0.30 mm |
| Thick Plate | 20.0 – 80.0 | 0.787 – 3.150 | ±0.30 – ±0.80 mm |
| Extra Thick Plate | 80.0 – 150.0 | 3.150 – 5.906 | ±0.80 – ±1.50 mm |
Standard Width Range
| Width (mm) | Width (inches) | Typical Use |
|---|---|---|
| 500 – 1000 | 20 – 40 | Small components, precision parts |
| 1000 – 1500 | 40 – 60 | General fabrication |
| 1500 – 2000 | 60 – 80 | Large structural components |
| 2000 – 2500 | 80 – 100 | Heavy industrial applications |
Standard Length Range
| Length (mm) | Length (inches) | Notes |
|---|---|---|
| 2000 – 4000 | 80 – 160 | Standard |
| 4000 – 6000 | 160 – 240 | Extended |
| 6000 – 8000 | 240 – 315 | Custom (upon request) |
Contact us to customize GH4169 plate sizes to suit your project
5. Surface treatment and processing options for GH4169 alloy plates
Choose the optimal finish for your Custom Fabrication and assembly requirements.
| Finish Name | Condition / Treatment | Typical Application |
| Bright Annealed (BA) | Vacuum heat treated, mirror-like | Aerospace liners, high-precision reflectors. |
| No.1 Finish | Hot rolled, annealed, and pickled | Heavy structural furnace parts, baffles. |
| 2B / Polished | Cold rolled, smooth grey finish | General high-temp industrial equipment. |
| Sandblasted | Mechanical surface cleaning | Components requiring high coating adhesion. |
| PVC Protected | Double-sided PVC/PE film | Preventing scratches during laser cutting. |
6. GH4169 alloy sheet inspection equipment
Our Quality Assurance department ensures every sheet is delivered with a 3.1 Mill Test Certificate (MTC).
| Testing Category | Equipment Used | Industrial Significance |
| Chemical Analysis | Direct Reading Spectrometer (PMI) | Verified elemental balance (Ni, Cr, Nb). |
| Mechanical Test | High-Temp Tensile Testing Machine | Guaranteed strength at 650°C. |
| Internal Integrity | Ultrasonic Flaw Detector (UT) | Zero voids or "freckles" (Macro-segregation). |
| Microstructure | Metallographic Microscope (ASTM E112) | Verified uniform grain size (Level 8 or finer). |
| Surface Inspection | Dye Penetrant (FPI) / Profilometer | Zero surface stress initiators or cracks. |
| Pressure Verification | Hydrostatic Testing Bench | Critical for high-pressure reactor components. |
Why choose to source GH4169 plates from Gnee Steel?
✅️Direct Factory Pricing: Skip the middlemen and secure Tier-1 Supplier rates.
✅️VIM+VAR Melting: We use double-vacuum melting to eliminate impurities and maximize fatigue life.
✅️Global Logistics: Fast and secure shipping to USA, Europe, and Asia with 100% traceability.
✅️Small Order Support: We provide small-batch specimens and coupons for laboratory validation.
Contact us now to get the latest export price for GH4169 in 2026
FAQ
Q1: Can GH4169 plates be welded successfully for aerospace liners?
A: Yes. GH4169 is considered one of the most weldable superalloys. Its delayed aging response prevents "strain-age cracking" during the fabrication of complex combustion chambers.
Q2: Is GH4169 equivalent to Inconel 718 plate?
A: Absolutely. GH4169 is the Chinese designation that maps directly to the global UNS N07718 (Alloy 718) specification. Our plates are globally interchangeable.
Q3: Do you offer PVC film protection for bright annealed sheets?
A: Yes. For BA (Bright Annealed) sheets used in precision medical or aerospace parts, we provide double-sided PVC or PE film to ensure a zero-defect surface during shipping and laser cutting.
Q4: Can you provide cut-to-size rings or discs from thick plates?
A: Yes. Using our high-precision waterjet systems, we can provide precision-cut GH4169 rings, flanges, and irregular shapes to minimize your material waste.
