Gnee Steel is a leading supplier and exporter of GH4169 round bars, a nickel-based alloy known for its exceptional strength, corrosion resistance, and durability. GH4169 round bars are widely used due to their superior oxidation and corrosion resistance, as well as their ability to withstand high temperatures in a variety of extreme environments. We employ not only modern manufacturing processes but also reputable raw material suppliers.
All of this ensures the reliability and precision of the final product. Whatever your specific requirements for size, width, or shape, our GH4169 round bars can meet your needs in multiple industries, including aerospace, marine, and chemical, as they can be tailored to your specific specifications. Choose GH4169 round bars to meet your long-term application needs.
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GH4169 (Inconel 718) Round Bar Size Guide
GH4169 (Inconel 718) Round Bar Size Guide
GH4169 round bar (also known as Inconel 718, UNS N07718, or DIN 2.4668) is a nickel-chromium-molybdenum precipitation-hardening alloy bar. It is typically supplied in round bar form for high-temperature and high-strength applications, with typical diameters ranging from 3 mm to 800 mm.
Why is Inconel 718 difficult to machine?
Inconel 718 nickel-based superalloys exhibit excellent properties at high temperatures, making them widely used in the aerospace, marine, and automotive industries. However, Inconel 718 has poor thermal conductivity and is prone to rapid strain hardening, resulting in poor machinability and poor surface finish.
1. GH4169 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 |
2. GH4169 Round Bar Chemical Composition
| Chemical Requirements | |||||||
|---|---|---|---|---|---|---|---|
| Ni | Fe | Mo | Mn | Si | Cr | C | |
| Max | 55.0 | Bal | 3.30 | 0.35 | 0.35 | 21.0 | 0.08 |
| Min | 50.0 | 2.80 | 17.0 | ||||
3. GH4169 Round Bars Mechanical Properties
Inconel 718 round bars possess excellent tensile strength, yield strength, and hardness, as well as superior creep resistance and fatigue resistance. They are ideal for high-temperature, high-stress applications in aerospace and industrial fields.
| 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 % |
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4. Nickel Alloy 718 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. High temperature Alloy gh4169 Bars Dimensions
| Metric | US Bar | ASTM/ Canadian | Japanese | ||||
|---|---|---|---|---|---|---|---|
| Bar Size | Diam. (mm) | Bar Size | Diam. (Inch) | Bar Size | Diam. (mm2) | Bar Size | Diam. (mm) |
| 5 | 5 | #2 | 0.250 | 10M | 100 | 6 | 6 |
| 5.5 | 5.5 | #3 | 0.375 | 15M | 200 | 10 | 10 |
| 6 | 6 | #4 | 0.500 | 20M | 300 | 13 | 13 |
| 7 | 7 | #5 | 0.625 | 25M | 500 | 16 | 16 |
| 8 | 8 | #6 | 0.750 | 30M | 700 | 19 | 19 |
| 9 | 9 | #7 | 0.875 | 35M | 1000 | 22 | 22 |
| 10 | 10 | #8 | 1.000 | 45M | 1500 | 25 | 25 |
| 11 | 11 | #9 | 1.125 | 55M | 2500 | 29 | 29 |
| 12 | 12 | #10 | 1.250 | 32 | 32 | ||
| 14 | 14 | #11 | 1.375 | 35 | 35 | ||
| 16 | 16 | #12 | 1.500 | 38 | 38 | ||
| 18 | 18 | #13 | 1.625 | 41 | 41 | ||
| 20 | 20 | #14 | 1.750 | 44 | 44 | ||
| 22 | 22 | #15 | 1.875 | 48 | 48 | ||
| 25 | 25 | #16 | 2.000 | 51 | 51 | ||
| 28 | 28 | #18 | 2.250 | 57 | 57 | ||
| 32 | 32 | ||||||
| 36 | 36 | ||||||
| 40 | 40 | ||||||
| 44 | 44 | ||||||
| 50 | 50 | ||||||
6. Thickness Chart of gh4169 Round Bar
| Thickness | Weight (kg/m) |
|---|---|
| 1/8″ | 0.0062 |
| 1/2″ | 0.0062 |
| 4 mm | 0.0098 |
| 5 mm | 0.0154 |
| 6 mm | 0.0223 |
| 7 mm | 0.0298 |
| 8 mm | 0.0398 |
| 9 mm | 0.0498 |
| 10 mm | 0.0620 |
| 11 mm | 0.0748 |
| 12 mm | 0.0889 |
| 13 mm | 1.0043 |
| 14 mm | 1.0207 |
| 15 mm | 1.0391 |
7. UNS N07718 Round Bar Size Chart
| ASTM/Canadian Bar Size | Diameter (mm²) | Metric Bar Size | Diameter (mm) | Japanese Bar Size | Diameter (mm) | US Bar Size | Diameter (Inch) |
|---|---|---|---|---|---|---|---|
| 10M | 100 | 5 | 5 | 6 | 6 | #2 | 0.250 |
| 15M | 200 | 5.5 | 5.5 | 10 | 10 | #3 | 0.375 |
| 20M | 300 | 6 | 6 | 13 | 13 | #4 | 0.500 |
| 25M | 500 | 7 | 7 | 16 | 16 | #5 | 0.625 |
| 30M | 700 | 8 | 8 | 19 | 19 | #6 | 0.750 |
| 35M | 1000 | 9 | 9 | 22 | 22 | #7 | 0.875 |
| 45M | 1500 | 10 | 10 | 25 | 25 | #8 | 1.000 |
| 55M | 2500 | 11 | 11 | 29 | 29 | #9 | 1.125 |
| - | - | 12 | 12 | 32 | 32 | #10 | 1.250 |
| - | - | 14 | 14 | 35 | 35 | #11 | 1.375 |
| - | - | 16 | 16 | 38 | 38 | #12 | 1.500 |
| - | - | 18 | 18 | 41 | 41 | #13 | 1.625 |
| - | - | 20 | 20 | 44 | 44 | #14 | 1.750 |
| - | - | 22 | 22 | 48 | 48 | #15 | 1.875 |
| - | - | 28 | 28 | 57 | 57 | #18 | 2.250 |
| - | - | 32 | 32 | - | - | - | - |
Click to contact us to customize the GH4169 round bar size you need.
Why Choose Gnee as Your Nickel-Based Alloy Supplier
✅ Over 18 years of export experience, products sold to more than 80 countries
✅ Certified by ISO, SGS, and BV
✅ Global inventory of Inconel, Hastelloy, Incoloy, and Monel alloy tubing, plates, and bars
✅ Custom processing services available – including cutting, polishing, CNC machining, and packaging
✅ Fast delivery within 7-15 days, supported by global logistics partners
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: Why is AMS 5662 the preferred standard for GH4169 bars?
A: AMS 5662 ensures the material is supplied in the solution-treated condition with controlled grain size. This provides the best balance of machinability and the potential to reach peak strength after final double-aging.
Q2: Can your GH4169 bars be used for aerospace fasteners?
A: Absolutely. Our bright bars are centerless ground with a Smooth Finish and tight tolerances (h9/h10), making them ideal for high-speed thread rolling and CNC turning of aerospace bolts and studs.
Q3: What is the benefit of the VIM+VAR process?
A: VIM+VAR (Double Melting) removes harmful trace elements (Pb, Bi, Se, Te) and ensures a homogeneous chemical distribution. This is essential for preventing premature fatigue failure in rotating engine parts.
Q4: Do you offer trial orders for non-standard diameters?
A: Yes. We support prototype development and can provide custom forged round rods for non-stock sizes with flexible MOQ options.
