Inconel 718
Inconel 718
Inconel 718 is a nickel-ferrous-chromium-based superalloy designed to deliver strength at high temperatures up to 650°C. It combines toughness, weldability, and resistance to stress rupture. The alloy is age-hardenable, which makes it easy to fabricate into complex shapes without losing mechanical integrity. Inconel 718 has a perfectly balanced composition, with 50-55% nickel (with cobalt) forming the corrosion-resistant matrix, 17-21% chromium enhancing oxidation resistance, and niobium and molybdenum strengthening the alloy against creep and fatigue. Iron forms the balance and adds toughness, while small amounts of titanium and aluminum improve hardness through precipitation hardening. Even trace levels of elements like carbon, manganese, and copper affect the way this alloy handles forming and machining.
Parag Metals supplies this high-performance alloy to industries that demand durability under extreme conditions. The most effective process for alloy 718 involves solution annealing at 1700–1850°F, followed by rapid cooling usually in water. Precipitation hardening is then carried out at 1325°F for eight hours, followed by furnace cooling to 1150°F, holding for another 18 hours and then air cooling. This treatment encourages the formation of nickel-aluminum-titanium-niobium phases, which improve strength and rupture life while maintaining ductility. These methods ensure that Inconel 718 mechanical properties remain stable even under severe stress, and during a long service life, making it suitable for essential aerospace and power applications.
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Inconel 718 Sheet, Inconel 718 Plate, Inconel 718 Coils, Inconel 718 Rods, Inconel 718 Wires Suppliers in Mumbai, India.
The Inconel 718 density is about 0.296 lb/in³ in the annealed condition and slightly higher when aged.Its melting point is between 2300-2437°F (1260-1336°C), which is sufficient for turbine blades, jet engines, and reactor components. The alloy has good creep resistance and thermal stability. Combined with a favorable Inconel 718 hardness and thermal conductivity, it can handle both sustained heat and sudden thermal cycling without losing strength. This unique mix of stability, strength and corrosion resistance makes it stand out among high-temperature alloys.
Inconel 718 is supplied in many forms, such as sheets, plates, rods, bars and forged parts. It has a high tensile strength, corrosion resistance, and excellent weldability. Common Inconel 718 uses range from aerospace engine components, gas turbines, and nuclear reactors to oilfield equipment and chemical processing units. It is trusted where failure is not an option. As one of the leading Inconel 718 suppliers in India, we ensure consistent quality and availability for industries that demand precision and reliability.
Inconel 718 Specification
The Inconel 718 specification outlines the standards, forms and important requirements that enable this alloy’s constant performance in critical applications.
| Product | Inconel 718 |
|---|---|
| Equivalents | Alloy 718, UNS N07718, 2.4668 |
| Items | Bar, Rod, Wire, Plates, Nut & Bolts, Fasteners, Strip |
| Size | 1/4" – 10" |
| Specifications | ASTM, ASME, DIN, GOST, JIS |
| Fittings Type | NA |
| Other Fittings | Nuts, Bolts, Screws, Threaded Bars |
Inconel 718 Chemical Composition
The Inconel 718 chemical composition lists the exact percentages of nickel, chromium, iron, and other elements that give the alloy its strength, toughness, and resistance to high temperatures.
| Element | Inconel 718 |
|---|---|
| Ni | 50 – 55 |
| Fe | Bal |
| Cr | 17 – 21 |
| Cu | 0.3 max |
| Mo | 2.8 – 3.3 |
| Nb | 4.75 – 5.5 |
| C | 0.08 max |
| Mn | 0.35 max |
| P | 0.015 max |
| S | 0.015 max |
| Si | 0.35 max |
| Ti | 0.65 – 1.15 |
| Al | 0.2 – 0.8 |
| Co | 1.0 max |
| B | 0.006 max |
Inconel 718 Mechanical Properties
The Inconel 718 mechanical properties table shows the alloy’s tensile strength, hardness, and elongation values, which define how it performs under stress and extreme service conditions.
| Density | 8.2 g/cm³ |
|---|---|
| Melting Point | 1350 °C (2460 °F) |
| Tensile Strength | Psi – 135,000 , MPa – 930 |
| Yield Strength (0.2% Offset) | Psi – 70,000 , MPa – 482 |
| Elongation | 45 % |
Inconel 718 Physical Properties
The Inconel 718 physical properties include density, melting point, and thermal characteristics that make this alloy reliable for aerospace, power, and chemical processing industries.
| Property | L-PBF Processed Inconel 718 Alloy (Lateral YZ Plane) | L-PBF Processed Inconel 718 Alloy (Frontal XZ Plane) | L-PBF Processed Inconel 718 Alloy (Horizontal XY Plane) | Cast Inconel 718 Alloy |
|---|---|---|---|---|
| Hardness (HV0.3) | 330 ± 8.05 | 279.45 ± 9.45 | 349.18 ± 10.73 | 408.82 ± 13.03 |
| Hardness (MPa) | 337.52 ± 23.71 | 331.32 ± 17.30 | 372.5 ± 21.03 | 502.66 ± 21.95 |
| Young’s Modulus (GPa) | 88.65 ± 3.81 | 90.11 ± 2.43 | 92.78 ± 5.77 | 99.67 ± 6.94 |
Application of Inconel 718
