Nickel Alloy Inconel 718 vs Titanium Grade 5
Cross-family material comparison
Nickel Alloy Inconel 718 is a nickel alloy grade and Titanium Grade 5 is a titanium grade — different families, so density, stiffness and cost move together with strength. Grade 5 is the stronger of the two: yield strength 880 MPa (128 ksi) against 550 MPa (79.8 ksi) for Inconel 718, about 60% more. In exchange, Inconel 718 is the more ductile: elongation 45% versus 14% for Grade 5, and Grade 5 is harder (334 HB vs 200 HB). Grade 5 is lighter (4.43 g/cm³ vs 8.19 g/cm³ for Inconel 718) and Inconel 718 is stiffer (200 GPa vs 113.8 GPa).
Inconel 718Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Grade 5Choose it when strength drives the design, or when weight is the constraint.
Inconel 718 vs Grade 5: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all grades of the two families in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all grades of the two families in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Compressive Strength
Hardness, Rockwell C
Same in both: Shear Strength 620 MPa89.9 ksi
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Same in both: Min Service Temperature -253°C-423 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Brazeability / Solderability
Polishability
Same in both: Castability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
Strength versus weight
Yield strength against density for every grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | Inconel 718 | Grade 5 |
|---|---|---|
| Default condition | Solution Annealed | O |
| Relative cost | $$$ Premium | $$$ Premium |
| Min. machined wall | 1.5 mm | 1 mm |
| Best machined surface | Ra 1.6 µm | Ra 1.6 µm |
| AlCrN | — | Yes |
| AlTiN | — | Yes |
| Anodizing Type II | — | Yes |
| CVD Al2O3 | — | Yes |
| CVD TiCN | — | Yes |
| CVD TiN | — | Yes |
| Cerakote | — | Yes |
| CrN | — | Yes |
| DLC | — | Yes |
| Gold Plating | Yes | — |
| MoS2 | — | Yes |
| Multilayer CVD | — | Yes |
| Silver Plating | Yes | — |
| TiAlN | — | Yes |
| TiB2 | — | Yes |
| TiCN | — | Yes |
| TiN | — | Yes |
| WC/C | — | Yes |
Both are offered for CNC machining, Sheet metal and 3D printing. They share 3 finishes: Electropolishing, HVOF Coating, Plasma Spray.
Inconel 718 vs Grade 5 — frequently asked
Is Grade 5 stronger than Inconel 718?
Yes. Grade 5 has a typical yield strength of 880 MPa (128 ksi) against 550 MPa (79.8 ksi) for Inconel 718 — about 60% more. Tensile strength is 950 MPa (138 ksi) vs 965 MPa (140 ksi).
Which is cheaper, Inconel 718 or Grade 5?
Both sit in the same relative cost tier ($$$, premium); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, Inconel 718 or Grade 5?
Grade 5. Its weldability rates very good (75/100) against very good (70/100) for Inconel 718.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Inconel 718 and Grade 5 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.