GH4169 (Inconel 718) Round Bar | Wholesale Black and Glossy Stock
Global wholesale suppliers offer high-temperature resistant GH4169 (Inconel 718) round bars in two finishes: black (hot-rolled/annealed) and bright (polished). These nickel-based superalloys are commonly used in industries such as aerospace, oil and gas, and turbines.
What are the disadvantages of Inconel 718?
Disadvantages and alternatives of Inconel 718
While Inconel 718 boasts excellent mechanical and corrosion resistance properties, it also has some drawbacks: High cost: Due to its complex manufacturing process, Inconel 718 is expensive. Difficult to process: Its high hardness makes material removal difficult and accelerates tool wear.
1. Gnee Alloy currently has GH4169 in stock and specifications (2026)
Material: GH4169 / NiCr19NbMo / UNS N07718 / 2.4668.
Sizes: Diameters range from 3mm to over 254mm; custom lengths are available from stock, including 0.2m, 0.5m, and up to 6000mm.
Surface Finish: Black/Rough: Hot-rolled (HR) or annealed, typically with an oxide layer.
Bright/Glossy: Centerless grinding (CG), polishing (Ra ≤ 0.8 μm), or cold drawing.
Standards: AMS 5662, 5663, 5664, ASTM B637, GB/T.
2. Chemical composition (by weight) of GH4169 rod
| Element | Content (%) | Function |
|---|---|---|
| Nickel (Ni) | 50.0 – 55.0 | Matrix element; high-temperature stability |
| Chromium (Cr) | 17.0 – 21.0 | Oxidation and corrosion resistance |
| Iron (Fe) | Balance (~18-20) | Fe-Ni-Cr base alloy |
| Niobium (Nb) | 4.75 – 5.50 | Core strengthening element – forms γ″ phase (Ni₃Nb) |
| Molybdenum (Mo) | 2.80 – 3.30 | Solid-solution strengthening; creep resistance |
| Titanium (Ti) | 0.65 – 1.15 | Forms γ′ strengthening phase |
| Aluminum (Al) | 0.20 – 0.80 | Forms γ′ strengthening phase; improves oxidation resistance |
| Carbon (C) | ≤ 0.08 | Low carbon for toughness |
| Manganese (Mn) | ≤ 0.35 | Deoxidizer |
| Silicon (Si) | ≤ 0.35 | Deoxidizer |
| Phosphorus (P) | ≤ 0.015 | Ensures toughness |
| Sulfur (S) | ≤ 0.015 | Ensures hot workability |
| Boron (B) | 0.002 – 0.006 | Grain boundary strengthener |
| Cobalt (Co) | ≤ 1.00 | Residual element |
| Copper (Cu) | ≤ 0.30 | Residual element |
3. GH4169 room temperature mechanical properties (aging condition - both are the same)
| Property | Value | Test Standard |
|---|---|---|
| Tensile Strength, Ultimate | ≥ 1275 MPa (185 ksi) | ASTM E8 / AMS 2370 |
| Tensile Strength, Yield (0.2% Offset) | ≥ 1035 MPa (150 ksi) | ASTM E8 / AMS 2370 |
| Elongation at Break (4D) | ≥ 12% | ASTM E8 / AMS 2370 |
| Reduction of Area | ≥ 15% | ASTM E8 |
| Hardness (Rockwell C) | 35 – 40 HRC | ASTM E18 |
| Modulus of Elasticity | ~200 GPa (29.0 × 10⁶ psi) | ASTM E111 |
| Poisson's Ratio | 0.29 – 0.30 | – |
| Impact Toughness (Charpy V-notch, RT) | ≥ 20 J | ASTM E23 |
Click to download the GH4169 alloy PDF file now
4. Comparison of Surface Dimensions of GH4169 Round Bars
GH4169 Black Bar (Hot Rolled / Forged)
| Diameter Range (mm) | Diameter Range (in) | Length (mm) | Tolerance Grade |
|---|---|---|---|
| 10 – 18 | 0.375 – 0.750 | 2000 – 6000 | h9 – h10 |
| 18 – 30 | 0.750 – 1.200 | 2000 – 6000 | h9 – h10 |
| 30 – 50 | 1.200 – 2.000 | 2000 – 6000 | h9 – h10 |
| 50 – 80 | 2.000 – 3.150 | 2000 – 6000 | h9 – h10 |
| 80 – 100 | 3.150 – 4.000 | 2000 – 6000 | h10 – h11 |
| 100 – 150 | 4.000 – 6.000 | 2000 – 4000 | h10 – h11 |
| 150 – 200 | 6.000 – 8.000 | 2000 – 4000 | h10 – h11 |
GH4169 Bright Bar (Cold Drawn / Ground)
| Diameter Range (mm) | Diameter Range (in) | Tolerance Grade | Surface Roughness (Ra) | Straightness (mm/m) |
|---|---|---|---|---|
| 3 – 6 | 0.125 – 0.250 | h6 – h8 | ≤ 0.4 µm | ≤ 0.3 |
| 6 – 10 | 0.250 – 0.375 | h6 – h8 | ≤ 0.4 µm | ≤ 0.3 |
| 10 – 18 | 0.375 – 0.750 | h6 – h8 | ≤ 0.8 µm | ≤ 0.3 |
| 18 – 30 | 0.750 – 1.200 | h6 – h8 | ≤ 0.8 µm | ≤ 0.3 |
| 30 – 50 | 1.200 – 2.000 | h6 – h8 | ≤ 1.6 µm | ≤ 0.5 |
| 50 – 80 | 2.000 – 3.150 | h6 – h8 | ≤ 1.6 µm | ≤ 0.5 |
| 80 – 100 | 3.150 – 4.000 | h7 – h9 | ≤ 1.6 µm | ≤ 0.5 |
Contact us to customize GH4169 products to fit your project dimensions
5. Typical Pricing and Characteristics of GH4169 Bars
Price Range: Wholesale prices are typically quoted per kilogram or smaller pre-cut lengths, with bulk prices ranging from approximately $15-35/kg.
Characteristics: Excellent creep rupture strength, superior fatigue resistance, and good corrosion resistance at high temperatures (< 650°C-700°C).
Why should we source GH4169 from our wholesale stock at Gnee Alloy?
As a Tier 1 manufacturer, Gnee Alloy offers a completely transparent supply chain and rapid supply chain services:
✅️Wholesale Pricing: Benefit from Direct Factory Price on bulk orders of both black and bright rods.
✅️Fast Global Shipping: We stock diameters from 10mm to 300mm ready for immediate dispatch to 50+ countries.
✅️MTC 3.1 Traceability: Full heat analysis and dimensional verification documented for every surface condition.
✅️Custom Fabrication: We offer precision Cut-to-Length services to deliver blanks that fit your automated bar feeders perfectly.
Gnee Alloy 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 Alloy GH4169 Product Packing
Contact us for the latest export price quote for GH4169 Alloy
FAQ
Q1: Is the "Black Surface" material lower quality than the "Bright Surface"?
A: No. The internal metallurgy (refined via VIM+VAR) is identical. The only difference is the final surface processing. Black surface is ideal if you plan to re-forge or perform heavy rough machining yourself.
Q2: Can I get h9 tolerance on a black hot-rolled bar?
A: No. Hot-rolled bars have loose tolerances due to thermal expansion during cooling. If your CNC requires tight tolerance, we recommend ordering our Precision Ground bright rods to prevent tool damage and feeding jams.
Q3: Is your GH4169 interchangeable with Inconel 718?
A: Absolutely. GH4169 is the technische equivalent to UNS N07718. We provide compliance documents proving parity with AMS 5662 and ASTM B637.
Q4: Do you support small trial orders for different surface finishes?
A: Yes. We support R&D by offering Flexible MOQs on our in-stock inventory, allowing you to test both surface types before committing to a full wholesale order.
