In high-stress environments such as aerospace turbine shafts, nuclear reactors, and oilfield downhole tools, the structural integrity of materials is paramount. For purchasing managers and engineers, key pain points when sourcing GH4169 hot-forged round bars include:
Internal segregation ("freckles"): Large-diameter bars often suffer from chemical composition imbalances, which can lead to catastrophic fatigue failure.
Inconsistent grain size: Poor forging control can result in coarse grains, significantly reducing high-cycle fatigue life.
Centerline porosity: Insufficient forging ratios can leave internal voids in the bar core.
At Gnee Steel, we eliminate these risks. As a Tier 1 manufacturer, we employ VIM+VAR processes and high-pressure reduction forging technology to ensure zero-defect quality.
Request today's GH4169 inventory list and wholesale price
Hot-forged AMS 5662 GH4169 (Inconel 718) aerospace-grade nickel alloy bars
Hot-forged AMS 5662 GH4169 (Inconel 718) aerospace-grade nickel alloy bars
Hot-forged GH4169 nickel-cobalt alloy round bars are a high-performance, heat-resistant, high-temperature alloy (similar to Inconel 718) suitable for harsh environments, exhibiting excellent tensile strength and creep resistance, with a maximum temperature resistance of 700°C. These forged bars play a crucial role in aero-engines, aerospace components, and petrochemical equipment due to their superior oxidation resistance.
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).
GH4169 Nickel Alloy Round Bar Hot Rolled Rod Description
| Form | Nickel Alloy Bars |
| Grade | GH4169 |
| Outer Diameter | 6mm-300mm or according to customer's requirement |
| Length | custom cutting any length as request |
| Standard | ASTM, ASME, EN, JIS, DIN, GB/T, etc |
| Process Method | Hot Rolled, Cold Drawn, Cold Rolled, Forged Round Bar & Rod |
| Surface Finish | Bright, Hot Rolled Pickled, Cold Drawn, Sand Blasting Finished, Polished, Hairline |
| Other Grade |
Hastelloy : B2 B3 C22 C276 G30 X |
| Price Item | EXW FOB CFR CIF |
| Payment | 30% TT inadvance, 70% TT Balance against copy of B/L |
| Delivery Time | It depends on your bars order total quantity and stock of these mother origin materials. Usually from the start of the order to the completion of production is about 3-4 weeks |
| Quality Requirement | Mill test certificate will be offered with shipment, the third party inspection is available |
| Main Markets | Europe, North America, Middle East, Southeast Asia |
| Metal Test | High or low temperature impact test, metallographic analysis |
| Chemical Analysis | As nickel alloy 718 bars standard |
1. Chemical composition table for GH4169 bars (Standard: AMS 5662 / ASTM B637):
| Element | Ni | Cr | Nb (Niobium) | Mo | Ti | Al | Co | P/S |
| Spec (%) | 50.0-55.0 | 17.0-21.0 | 4.75-5.50 | 2.80-3.30 | 0.65-1.15 | 0.20-0.80 | ≤ 1.00 | ≤ 0.010 |
GH4169 bars PMI date sheet
2. Mechanical properties of GH4169 alloy rod (fully aged state):
| Property | Value at 20°C | Value at 650°C (1200°F) | Why It Matters |
| Yield Strength (σp0.2) | ≥ 1030 MPa | ≥ 850 MPa | Resists permanent deformation. |
| Tensile Strength (σb) | ≥ 1240 MPa | ≥ 1000 MPa | Elite high-temp load capacity. |
| Elongation (δ5) | ≥ 12% | ≥ 15% | Exceptional ductility and safety. |
| Stress Rupture Life | - | ≥ 100 Hours (at 690MPa) | Guaranteed Long-term Service Life. |
Click to download the GH4169 alloy PDF file now
3. GH4169 Bar Manufacturing Process: VIM + VAR Advantages
Our GH4169 (equivalent to Inconel 718 / UNS N07718) is rigorously controlled at the atomic level.
Vacuum Induction Melting (VIM): Removes dissolved gases, ensuring ultra-low trace impurity content (P, S < 0.010%).
Vacuum Arc Remelting (VAR): Eliminates non-metallic inclusions, ensuring extremely high chemical homogeneity and avoiding the "spots" commonly found in standard materials.
High Forging Ratio (≥4:1): We use heavy-duty hydraulic presses to refine the microstructure to ASTM E112 Grade 8 or higher, ensuring the highest industrial durability.
VIM + VAR process
4. GH4169 alloy rod supply range and surface condition
We maintain a massive Wholesale Inventory of forged rods ready for Immediate Dispatch.
Diameter Range: 10 mm to 450 mm (Large diameter specialists).
Surface Finishes: Black (as forged), Peeled, or Precision Ground (h8-h11 tolerance).
Supply State: Solution Treated (Standard for machining) or Fully Aged (Ready for service).
Custom Fabrication: We offer Cut-to-Size services using precision bandsaws to match your assembly needs.
5. Gnee Steel GH4169 Alloy Rod Quality Guarantee
As a Reliable Supplier, we provide the documentation necessary to pass the most rigorous audits:
✅️100% NDT Inspection: Every bar undergoes Ultrasonic Testing (UT) to AMS 2154 Class A standards.
✅️MTC 3.1 & 3.2: Full Mill Test Certificates documenting grain size and mechanical verification.
✅️Global Compliance: Materials fully compliant with AMS 5662, AMS 5663, and ASTM B637.
Gnee Steel GH4169(inconel 718) Certificate
Contact us for the latest export price quote for GH4169 Alloy
FAQ
Q1: Is GH4169 exactly the same as Inconel 718 bar?
A: Yes. GH4169 is the Chinese designation that maps directly to the global UNS N07718 specification. Our material is globally interchangeable and is used by Tier-1 aerospace and energy companies worldwide.
Q2: Why should I choose forged bars over rolled bars for large diameters?
A: Forged bars (especially above 100mm) offer a much denser internal structure and better grain refinement than rolling, which is critical for the Structural Integrity of rotating engine shafts and turbine discs.
Q3: Can you provide GH4169 rods for NACE MR0175 sour gas environments?
A: Absolutely. When heat-treated to a maximum hardness of 40 HRC, our GH4169 is fully compliant with NACE MR0175, making it ideal for high-pressure oil and gas downhole tools.
