Inconel 718 material properties
Inconel 718 material properties
Inconel 718 is a high-strength, corrosion-resistant nickel-chromium superalloy known for its excellent mechanical properties (tensile strength, fatigue resistance, creep resistance) over a wide temperature range, from cryogenic temperatures to high temperatures (up to approximately 700°C/1300°F). It also possesses good weldability and machinability, making it an ideal material for aerospace (jet engines, airframes) and energy applications. Its key characteristics include high tensile strength, good creep rupture life, a density of approximately 0.296 lb/in³ (8.19 g/cm³), and excellent oxidation and corrosion resistance. Its main components are nickel, chromium, iron, molybdenum, and niobium.
What are the disadvantages of Inconel 718?
Disadvantages and alternatives to Inconel 718
Despite its excellent mechanical properties and corrosion resistance, Inconel 718 also has some drawbacks: Cost: Due to its complex manufacturing process, Inconel 718 is expensive. Difficult to machine: Its high hardness makes material removal difficult and accelerates tool wear.
Properties of Inconel 718
Inconel 718 is a nickel-based superalloy that is ideal for applications requiring high strength at temperatures ranging from cryogenic temperatures up to 1400°F (approximately 760°C). Inconel 718 also possesses excellent tensile strength and impact strength.
Chemical Composition 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 and Oxidation Resistance of Inconel 718
Inconel 718 alloy exhibits good oxidation and corrosion resistance in the environments encountered during the operation of jet engines and gas turbines, within its effective strength temperature range.
Physical Properties of Inconel 718
|
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 |
Inconel 718 Mechanical properties
| Cold worked % |
Yield strength |
Ultimate tensile strength |
Elongation |
| 0 | 655 MPa [95 ksi] | 876 MPa [127 ksi] | 47 |
| 20 | 910 MPa [132 ksi] | 1138 MPa [165 ksi] | 2.2 |
| 37 | 1076 MPa [156 ksi] | 1310 MPa [190 ksi] | 2.5 |
|
50 |
1317 MPa [191 ksi] | 1538 MPa [223 ksi] | 1.9 |
|
60 |
1420 MPa [206 ksi] | 1669 MPa [242 ksi] | 2.2 |
|
68 |
1462 MPa [212 ksi] | 1744 MPa [253 ksi] | 2.4 |
|
75 |
1510 MPa [219 ksi] | 1813 MPa [263 ksi] | 2.9 |
|
80 |
1600 MPa [232 ksi] | 1889 MPa [274 ksi] | 2.4 |
|
84 |
1565 MPa [227 ksi] | 1931 MPa [280 ksi] | 2.7 |
|
87 |
1675 MPa [243 ksi] | 2013 MPa [292 ksi] | 2.7 |
|
90 |
1662 MPa [241 ksi] | 2048 MPa [297 ksi] | 2.8 |
|
92 |
1737 MPa [252 ksi] | 2096 MPa [304 ksi] | 2.7 |
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
📦 Packaging and Shipping
All stainless steel 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
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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