GH4169 is undoubtedly the "King of Superalloys." Also known globally as Inconel 718 or UNS N07718, it is the cornerstone of modern aerospace propulsion systems and high-pressure energy systems.
For customers, the greatest risk lies in material segregation (pitting) and non-metallic inclusions present in low-quality single-melted bars. These hidden defects can lead to catastrophic fatigue failure of rotating components. As a Tier 1 supplier, Gnee Alloy eliminates this risk through a professional VIM (Vacuum Induction Melting) + VAR (Vacuum Arc Remelting) dual vacuum refining process.
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GH4169 (Inconel 718) Nickel-Based Superalloy Tier 1 Supplier
GH4169 (Inconel 718) Nickel-Based Superalloy Tier 1 Supplier
GH4169 is the Chinese equivalent of Inconel 718 (UNS N07718). It is a high-strength, corrosion-resistant nickel-based superalloy commonly used in aerospace, nuclear energy, and petrochemical fields, with a maximum operating temperature of 1300°F (700°C).
How strong is Inconel 718?
Inconel 718 is a nickel-based superalloy ideal for applications requiring high strength over a temperature range from low temperatures to 1400°F (760°C). Inconel 718 also exhibits excellent tensile and impact strength.
Classification and Naming of GH4169
| Category | Type | Grade | Designations |
|---|---|---|---|
| Grades | Superalloys | GH4169 | China - GB , GB/T 14992 (2005) - Classification and designation for superalloys and high temperature intermetallic materials GB/T 14994 (2008) - Cold brawn heat-resisting superalloy bars |
Comparison of chemical composition of GH4169 and Inconel 718 (Aerospace grade vs. Standard industrial grade)
| Element | GH4169 (Our Premium Spec) | Standard UNS N07718 | Why it Matters |
| Niobium (Nb) | 5.0% - 5.3% | 4.75% - 5.50% | Critical for the stable γ′′ hardening phase. |
| Phosphorus (P) | ≤ 0.010% | ≤ 0.015% | Zero Hot Cracking during high-precision welding. |
| Sulfur (S) | ≤ 0.005% | ≤ 0.015% | Maximizes High-Cycle Fatigue life in engines. |
| Melting Route | VIM + VAR (Double Vacuum) | EAF + ESR (Single Vacuum) | Eliminates "freckles" and internal voids. |
Gnee Alloy Nickel Based Alloy PMI Test
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GH4169 Technical Specifications and Industrial Durability
| Property | Value |
|---|---|
| Temperature Range | Cryogenic down to -253°C up to turbine heat at 700°C |
| Yield Strength (at 650°C) | ≥ 850 MPa |
| Tensile Strength (at 20°C) | ≥ 1240 MPa |
| Hardness (Aged) | 36 – 44 HRC |
| Standards Compliance | Fully compliant with AMS 5662, AMS 5596, and ASTM B637 |
Mechanical properties of grade GH4169
| Proof strength Rp0.2 (MPa) |
Tensile strength Rm (MPa) |
Impact energy KV (J) |
Elongation at fracture A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 777 (≥) | 985 (≥) | 13 | 43 | 24 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 313 |
Physical properties of grade GH4169
| Property | Density kg/dm3 |
Temperature T °C/F |
Specific heat J / kgK |
Thermal conductivity W/mK |
Electric resistance µΩ·cm |
Modulus of elasticity kN/mm2 |
Expansion rate |
|---|---|---|---|---|---|---|---|
| 581 (≥) | 287 (≥) | 22 | 43 | 23 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 321 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 151 | 625 | 645 |
Gnee Alloy GH4169 Product Supply Capabilities
We are a reliable supplier to global aerospace and oil giants, offering the following products:
Forged Round Bars: Large diameter (up to 450 mm), 100% ultrasonically tested (UT Class A).
Seamless Tubes: High-pressure grade, suitable for fuel and hydraulic lines.
Precision Sheets: Cold-rolled precision sheets, suitable for combustion chamber linings.
Custom Machining: Offers fixed-length cutting and precision grinding (H8-H11) services.
GH4169 - Form of Supply
| Product type | Products | Dimension | Processes | Deliver Status |
|---|---|---|---|---|
| Plates / Sheets | Plates / Sheets | 0.08-200mm(T)*W*L | Forging, hot rolling and cold rolling | Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting |
| Steel Bar | Round Bar, Flat Bar, Square Bar | Φ8-1200mm*L | Forging, hot rolling and cold rolling, Cast | Black, Rough Turning, Shot Blasting, |
| Pipes / Tubes | Seamless Pipes/Tubes, Welded Pipes/Tubes | OD:6-219mm x WT:0.5-20.0mm | Hot extrusion, Cold Drawn, Welded | Annealed, Solution and Aging, Q+T, ACID-WASHE |
Gnee Alloy GH4169 Product Qualification Certificate
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Contact us for a quote on high-performance GH4169 !
Stop paying exorbitant prices for Western brands. We can offer you the same aerospace-grade GH4169 superalloy at a lower price. Our team is ready to provide you with a rapid quote (RFQ) within 12 hours.
Email: [ss@gneemetal.com]
WhatsApp/WeChat: +86 15824687445
Website: [https://www.superstainlessalloys.com/]
FAQ
Q1: Is GH4169 completely interchangeable with Inconel 718?
A: Yes. GH4169 is the technical equivalent of Inconel 718. It shares the same chemical DNA (UNS N07718 / 2.4668) and is globally accepted in aerospace and nuclear blueprints.
Q2: Why does the melting process affect the price per kg?
A: VIM+VAR (Double Melting) is a premium process that ensures ultra-clean steel. While it carries a higher initial cost, it provides a significantly longer Material Life Cycle and eliminates the million-dollar risk of component failure.
Q3: Do you offer wholesale pricing for bulk infrastructure projects?
A: Absolutely. As a Direct Factory Manufacturer, we offer tiered Wholesale Pricing and dedicated inventory reserves for long-term contract partners.
Q4: Are your materials NACE MR0175 compliant for sour gas?
A: Yes. When heat-treated to specific hardness levels, our GH4169 is the premier choice for Oil & Gas downhole tools requiring high-strength and H2S resistance.
