Gnee Steel is a professional manufacturer of Inconel 718 products. Gnee Steel's 718 alloy products are packaged in various ways, including: steel strapping: pipes with an outer diameter not exceeding 3 inches are typically bundled together with polypropylene film to prevent rusting during sea transport, then secured with steel straps; wooden crates/crates: pipes are usually packaged in wooden crates or crates for protection during transport, especially for longer or larger diameter pipes; seaworthy export packaging: suppliers typically use standard seaworthy export packaging methods, which may include various materials and techniques to protect the pipes during transport; and tarpaulin packaging: to prevent rainwater, seawater, etc., from seeping into the export wooden crate packaging during transport. Gnee Steel specializes in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power, automotive, and nuclear energy fields, and customized alloy material solutions can be provided according to customer needs. For alloy material price inquiries or to obtain customized alloy material solutions, please feel free to contact us at ss@gneesteel.com for a quote.
What are the physical properties of Inconel 718?
What are the physical properties of Inconel 718?
Inconel 718 is a high-strength, corrosion-resistant nickel-chromium-iron-based superalloy (containing 50-55% nickel and 17-21% chromium), renowned for its excellent stability at temperatures up to 700°C (1300°F). Its key physical properties include a density of approximately 8.19-8.23 g/cm³ (0.296 lb/in²), a melting point range of 1260-1336°C (2300-2440°F), and a magnetic permeability of less than 1.002. It exhibits high tensile strength, good ductility, and excellent resistance to post-weld cracking.
What type of metal is Inconel 718?
Nickel-chromium alloy
Inconel 718 is a precipitation-hardening nickel-chromium alloy containing significant amounts of iron, niobium, and molybdenum, as well as small amounts of aluminum and titanium.
Inconel 718 Alloy
Inconel 718 is a precipitation-hardening nickel-chromium alloy containing significant amounts of iron, niobium, and molybdenum, and minor amounts of aluminum and titanium. It combines corrosion resistance with high strength and excellent weldability, including resistance to post-weld cracking. This alloy exhibits excellent creep rupture strength at temperatures up to 700°C (1300°F). It is widely used in gas turbines, rocket engines, spacecraft, nuclear reactors, pumps, and tools.
Chemical Composition of Inconel 718
Typical chemical analysis of Inconel 718.
|
Element
|
Percentage |
| Carbon |
0.08 max |
| Manganese |
0.35 max |
| Phosphorus |
0.015 max |
| Sulfur |
0.015 max |
| Silicon |
0.35 max |
| Chromium |
17-21 |
| Nickel |
50-55 |
| Molybdenum |
2.80-3.30 |
| Columbium |
4.75-5.50 |
| Titanium |
0.65-1.15 |
| Aluminum |
0.20-0.80 |
| Cobalt |
1.00 max |
| Boron |
0.006 max |
| Copper |
0.30 max |
| Tantalum |
0.05 max |
| Iron |
Balance |
Corrosion Resistance and Oxidation Resistance of Inconel 718
In the atmospheres encountered during the operation of jet engines and gas turbines, Inconel 718 exhibits good oxidation and corrosion resistance within the effective strength range of the alloy.
Physical Properties of Inconel 718 Alloy
The typical physical properties of Inconel 718 are summarized in the table below.
|
Solution Treated |
Solution Treated and Aged |
|
| Density |
0.296 lb/in3 (8.192 g/cm3) |
0.297 lb/in3 (8.22 g/cm3) |
| Specific Gravity |
8.19 |
8.22 |
| Melting Range |
2500-2600°F |
1370-1430°C |
Thermal Conductivity of Inconel 718
The table below shows the thermal conductivity of Inconel 718 at different temperatures.
|
Temperature Range |
Co-Efficients |
||
|
°C |
°F |
W/m.K |
Btu.ft/ft2.hr.°F |
|
0-100 |
532-212 |
6.5 |
11.2 |
Mechanical properties of Alloy 718
As shown in the following data, precipitation heat treatment can significantly improve the room temperature strength of Inconel 718 alloy. These values are performance specifications for sheet, strip, and plate materials as defined in AMS 5596 and AMS 5597 standards.
|
Yield Strength |
Ultimate Tensile Strength |
Elongation |
|
|
Sheet and strip |
80,000 psi (550 MPa) |
140,000 psi (965 MPa) |
30 (min) |
|
Plate |
105,000 psi (725 MPa) |
150,000 psi (1,035 MPa) |
30 (min) |
Solution treatment followed by precipitation heat treatment.
|
Yield Strength |
Ultimate Tensile Strength |
Elongation |
|
150,000 (1,035 MPa) |
180,000 psi (1,240 MPa) |
12 (min) |
About Gnee Steel
Gnee Steel is a professional manufacturer of nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy 800, Incoloy 800H/HT, Incoloy 825, Monel 400, Monel K500, and other high-temperature alloy materials. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power generation, automotive, nuclear energy, and other fields, and we can provide customized alloy material solutions according to customer needs. For inquiries about alloy material prices or customized alloy material solutions, please feel free to contact us via email at ss@gneemetal.com for a quote.
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