For procurement managers and aerospace engineers, the most critical pain point lies in the reliability of alternatives. When project blueprints specify Inconel 718 (AMS 5662), but the supply chain provides GH4169, a series of significant issues arise:
Does its chemical purity meet the stringent requirements of vacuum melting?
Can its mechanical properties pass rigorous aerospace quality audits?
Can the manufacturer provide globally recognized documentation?
Our GH4169 superalloy bars are the ideal alternative to Inconel 718, conforming to global standards UNS N07718 and W.Nr. 2.4668. Our materials ensure full compliance with global standards in mission-critical high-temperature, high-pressure projects, eliminating the risks associated with substitution.
Download Full GH4169 vs. Inconel 718 Technical Comparison PDF
GH4169 Inconel 718 bars conforming to AMS 5662 and ASTM B637 standards
GH4169 Inconel 718 bars conforming to AMS 5662 and ASTM B637 standards
GH4169 (Inconel 718) bars, conforming to AMS 5662 and ASTM B637 standards, are high-strength, corrosion-resistant nickel-chromium superalloys suitable for the aerospace and oil and gas industries, maintaining excellent strength at temperatures up to 700°C. These bars are typically produced using vacuum ion melting (VIM) and vacuum argon arc welding (VAR) processes, exhibiting excellent high-temperature stability, good weldability, and high creep rupture strength.
What are the differences between Inconel 718 AMS 5662 and 5663?
AMS 5662 is the original state of the 718 alloy and the softest state in the AMS series. It can be heat-treated to transform into AMS 5663. This heat treatment can be achieved in two ways to obtain specific properties, such as optimal impact resistance or optimal tensile and creep rupture properties.
1. Comparison of chemical composition of GH4169 bars (typical percentage analysis)
| Element | Symbol | Our GH4169 Spec | AMS 5662 / ASTM B637 | Role in Performance |
| Nickel | Ni | 52.5% | 50.0 - 55.0% | Provides the base for thermal stability. |
| Chromium | Cr | 19.0% | 17.0 - 21.0% | Essential for oxidation resistance. |
| Niobium | Nb | 5.15% | 4.75 - 5.50% | Primary strengthening phase. |
| Molybdenum | Mo | 3.05% | 2.80 - 3.30% | Enhances creep-rupture strength. |
| Titanium | Ti | 0.95% | 0.65 - 1.15% | Works with Al for aging response. |
| Iron | Fe | Balance | Balance | Cost-effective matrix stability. |
Click to download the GH4169 alloy PDF file now
2. GH4169 Alloy Round Bar Specifications
| Form | Standard |
|---|---|
| Metal Type | UNS N07718 |
| Bar | ASTM B637 / AMS 5662 / AMS 5663 / AMS 5664 / ASTM B670 |
| Thickness | 50 mm to 6000 mm Long |
| Length | 1 To 6 Meters, Custom Cut Length |
| Diameter | 0.1 mm to 100 mm |
| Finish | Bright, Polish & Black |
3. GH4169 Round Bars Mechanical Properties
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
|---|---|---|---|---|---|
| Inconel 718 | 8.2 g/cm3 | 1350 °C (2460 °F) | Psi – 1,35,000 , MPa – 930 | Psi – 75,000 , MPa – 482 | 45 % |
4. Nickel Alloy GH4169 Round Bar Tolerances
| Alloy(s) | (over(+)/under(-)) Diameter Tol. | in. Spec. Diameter | |
|---|---|---|---|
| 718 | Hot Rolled | + 0.125", - 0.063" | Over 4 |
| 718 | Hot Rolled | + 0.031", - 0.016" | Over 1 to 2, incl. |
| 718 | Hot Rolled | +/- 0.016" | Up to 1, incl. |
| 718 | Hot Rolled | + 0.047", - 0.031" | Over 2 to 4, incl. |
5. GH4169 Global Standard
Our GH4169 is globally compatible, perfectly matching your design drawings whether they originate from the US, Europe, or Asia.
USA (Aerospace): Fully compliant with AMS 5662 and AMS 5663 (solution and aging requirements).
Industry and Energy: Compliant with ASTM B637, the industry benchmark for high-temperature fasteners.
Oil and Gas: Compliant with NACE MR0175 / ISO 15156, suitable for acidic gas environments.
European Equivalent Standard: Directly corresponds to W.Nr. 2.4668 (NiCr19NbMo) and DIN 17752.
6. Common Applications of GH4169 Rods
Aerospace: Gas turbine engine components, rotating parts, and high-speed airframe assemblies.
Oil & Gas: High-strength fasteners, wellhead assemblies, gate valves, and throttle valve stems.
Others: Nuclear reactors and chemical equipment.
7. Why source GH4169 from the primary manufacturer Gnee Steel?
In the world of superalloys, documentation is as critical as the metal. We provide the transparency your audit demands:
✅️VIM + VAR Purity: Double vacuum melting ensures zero internal inclusions, which is the key to maximizing High-Cycle Fatigue life.
✅️MTC 3.1 & 3.2 Traceability: Every bar is delivered with an EN 10204 3.1 Mill Test Certificate documenting heat analysis and mechanical parity with AMS standards.
✅️Industrial Durability: Our rods are tested for Stress Rupture Life (≥100 hours at 650°C/690MPa) before dispatch.
✅️Wholesale Pricing: Benefit from Direct Factory Prices while securing the highest international quality grade.
Gnee Steel GH4169(inconel 718) 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
Gnee Steel GH4169 Product Packing
Contact us for the latest export price quote for GH4169 Alloy
FAQ
Q1: Is GH4169 exactly the same as Inconel 718?
A: Yes. GH4169 is the Chinese designation that maps directly to the global UNS N07718 (Alloy 718) specification. Chemically and mechanically, they are the same material and are used interchangeably in global aerospace blueprints.
Q2: Will using GH4169 affect my project's certification?
A: Not if provided with proper documentation. We provide full MTC 3.1 Traceability and our material meets ASTM B637 and AMS 5662 requirements, which are accepted by most international engineering inspection bodies.
Q3: Can you provide GH4169 bars in the Solution-Treated (AMS 5662) state?
A: Absolutely. We supply bars in the Solution Treated condition for easier machining, or Fully Aged (AMS 5663 condition) if you require immediate high-strength structural performance.
Q4: Do you offer bulk discounts for major energy infrastructure projects?
A: Yes. As a leading Wholesale Supplier, we offer tiered pricing and long-term supply contracts for large-scale energy and aerospace projects.
