Learn about Inconel 718 alloy round bar
Inconel 718 round bar (or Alloy 718) is an age-hardenable nickel-chromium superalloy bar valued for its high tensile, fatigue, fracture, and creep strengths up to 1300°F (704°C), as well as its oxidation resistance up to 1800°F (982°C). It also offers excellent corrosion resistance, good weldability due to its low carbon content, and exceptional performance at low temperatures. Inconel 718 round bar is widely used in demanding applications such as aerospace fasteners, aircraft components, and chemical processing.
What is the composition of Inconel 718 round bar?
Inconel 718 round bar is a nickel-chromium alloy bar with a nickel content of up to 55%. It also contains 17% chromium, 4.9% niobium, at least 6.6% iron, as well as aluminum, boron, carbon, cobalt, copper, manganese, phosphorus, lead, sulfur, and silicon.
Inconel Alloy 718 Round Bar Specification
| Standard | ASTM B637, ASME SB637 |
| Round Bar Size | 3mm~ 800mm |
| Square Bar Size | 4mm* 4mm ~100mm* 100mm |
| Flat Bar Size | 2mm ~ 100mm |
| Hex Bar Size | 2mm ~ 100mm |
| Angle Size | 3mm* 20mm* 20mm~ 12mm* 100mm* 100mm |
| Thickness | 50 mm to 6000 mm Long |
| Length | 1 To 6 Meters, Custom Cut Length |
| Form | Round, Square, Hex(A/F), Rectangle, Billet, Ingot, Forging Etc |
Inconel 718 Bar / Rods Chemical Properties
| Grade | C | Mn | Si | Cu | S | Fe | Mo | Ni | Cr |
| Inconel 625 | 0.08 max | 0.35 max | 0.35 max | 0.30 max | 0.15 min | – | – | 50.0-55.0 min | 17.0–21.0 |
Inconel 718 Round Bars Mechanical Properties
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.2 g/cm3 | 1.350 °C (2460 °F) | Psi – 1,35,000 , MPa – 930 | Psi – 75,000 , MPa – 482 | 45 % |
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. |
Inconel 718 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 | ||
Other Types of Inconel 718 Round Bars
| Inconel 718 Bright Bar | Inconel 718 Hex Bar |
| Inconel 718 Flat Bar | Inconel 718 Black Bar |
| ASTM B637 Inconel 718 Forged Round Bar | Inconel 718 Hot Rolled Round Bar |
| N07718 Inconel Round Bars | Inconel 718 Black Bar |
| High Quality Inconel 718 Rods | Industrial Inconel 718 Rectangular Bars |
| Inconel Alloy 718 Square Bars | Alloy 718 Forged Bar |
| Inconel 718 Threaded Round Bar | Inconel 718 Hot Rolled Bars |
Key Properties of Inconel 718 Alloy Rod
High Strength: Inconel 718 alloy rod exhibits exceptional strength, including tensile, fatigue, and creep-rupture strength, maintaining excellent strength at elevated temperatures up to approximately 650°C (1200°F).
Excellent Corrosion Resistance: It exhibits excellent corrosion resistance even in harsh environments, particularly in high-temperature oxidation, carburizing, seawater, and sour gas environments.
Age Hardenability: The alloy can be heat-treated (age-hardened) to achieve excellent mechanical properties.
Fabrication: Due to its relatively low carbon content, it is easily fabricated and exhibits good weldability.
Typical Applications of 718 Alloy Rod
Oil and Gas: Wellhead components, downhole components, fasteners, packers, and tubing hangers for corrosive environments.
Aerospace: High-temperature bolts, fasteners, and components for jet engines and high-speed aircraft fuselages.
Chemical Process Industries: Components for gas scrubbers, acid handling equipment, and pulp and paper processing.
Others: cryogenic tanks, rocket fuel bottles, seawater cooling equipment.
Gnee Steel specializes in the production of various nickel-based alloys. Gnee Steel's product packaging includes steel strapping: Pipes with an outer diameter of 3 inches or less are typically strapped together with polypropylene film to prevent rust during sea transportation, and then secured with steel strapping. Wooden boxes/crates: Pipes are typically packaged in wooden boxes or crates to protect them during transportation, especially those that are longer or have larger diameters. Seaworthy export packaging: Suppliers typically use standard seaworthy export packaging methods, which may include a variety of materials and techniques to protect the pipes during transportation. Tarpaulin packaging: This prevents rainwater, seawater, and other external factors from penetrating the export wooden crates during transportation. Gnee Steel specializes in the production and sale of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power, automotive, and nuclear energy industries, and we can provide customized alloy material solutions based on customer needs. For alloy material pricing inquiries or customized alloy material solutions, please contact us for a quote at ss@gneemetal.com
