High Heat NI · Ni-Cr Superalloy
Nickel Alloy Inconel 718
Nickel Alloy Inconel 718 is a high heat ni nickel alloy — workhorse aerospace superalloy. Typical values: 1,100 MPa yield, 8.44 g/cm³, rated to 980 °C. Available for CNC machining, Sheet metal, 3D printing at FabDigit.
Properties
Typical room-temperature values in the Solution Annealed condition. Metric first, imperial in gray. The bars show where Inconel 718 sits against the other 11 nickel alloy grades in the catalog.
Datasheet
| Yield strength | 1,100 MPa160 ksi |
|---|---|
| Tensile strength | 1,240 MPa180 ksi |
| Hardness | 40 HRC≈ 371 HB |
| Density | 8.44 g/cm³0.305 lb/in³ |
| Specific strength (yield ÷ density) | 130 |
| Min service temp | -200 °C-328 °F |
| Max service temp | 980 °C1,796 °F |
| Electrical conductivity | 1.3 % IACS0.8 MS/m |
| Machinability | Poor20 / 100 |
| Weldability | Very good75 / 100 |
| Formability | Fair40 / 100 |
| ISO 513 machining group | S |
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Against other nickel alloy grades
Strength versus weight in the nickel alloy family
Yield strength against density for every nickel alloy grade FabDigit runs. Inconel 718 is highlighted; hover a dot for its name, or open the interactive family chart.
Manufacturability
The process limits FabDigit's quote engine applies to Inconel 718. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Poor20 / 100 |
|---|---|
| ISO material group | S.1 |
| Cutting speed (rough / finish) | 40 / 55 m/min |
| Minimum wall | 1.5 mm |
| Minimum internal radius | 2 mm |
| Drill depth limit | 3× diameter |
| Best surface (machined / polished) | Ra 1.6 / 0.8 µm |
| Hardenable after machining | Yes |
Sheet metal
| Formability | Fair40 / 100 |
|---|---|
| Weldability | Better75 / 100 |
| Bendable | Yes |
3D printing
| Technologies | DMLS |
|---|---|
| Layer height | 20 – 60 µmdefault 30 µm |
| Minimum wall / feature | 0.5 / 0.3 mm |
| Build envelope | 250 × 250 × 325 mm |
| Supports | Yes |
| Anisotropy | Mild |
| Mandatory post-processing | heat treatment |
Conditions and tempers
How Inconel 718 is supplied and what each state is for. The default is what FabDigit quotes unless your drawing says otherwise.
| Condition | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Solution AnnealedDefault Heat Treat State | Best corrosion resistance — food, chemical, marine hardware | — | — | — | — |
Stress Relieved Heat Treat State | Holds tight flatness/tolerance through heavy machining | — | — | — | — |
Aged Precipitation aged | Full strength delivered — nothing to do after machining | — | — | — | — |
As Printed Print State | Standard printed state — fine for prototypes and fixtures | — | — | — | — |
Heat treatment and post-processing
Operations FabDigit's suppliers routinely run on Inconel 718, ranked by how often they make sense for this grade.
Heat treatment
| Age (Inconel 718 standard) | Inconel 718 AMS 5662 cycle |
|---|---|
| Solution Anneal | Dissolve carbides; reset austenite (stainless) |
| Hot Isostatic Press (HIP) | Eliminate porosity in cast / 3DP parts |
Post-processing
| Manual Deburr | Deburrstandard |
|---|---|
| Edge Break (0.5mm) | Deburr |
| Shot Peen | Blast |
| Electropolish | Polish |
| CMM Inspection | Inspection |
| FAI Report | Inspection |
| Individual Bag | Packaging |
Surface finishes for Inconel 718
Coatings and treatments compatible with nickel alloy on the processes Inconel 718 runs on. Pick them in the quote configurator or call them out on the drawing.
Passivation
- Electropolishing
Plating
- Gold Plating
- Silver Plating
Marking / Decoration
- Chemical Etching
- Dot Peen Marking
- Electro-chemical Etching
- Embossing / Debossing
- Ink Stamping
- Laser Marking
- Mechanical Engraving
- Steel Stamping
- Vibro Engraving / Scribing
Thermal Spray
- HVOF Coating
- Plasma Spray
Equivalent designations
Standards and trade names that resolve to Nickel Alloy Inconel 718 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N07718
- Other
- Alloy 718GH4169IN718
Stock forms
Raw-material forms FabDigit sources Inconel 718 in.
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.