Titanium Ti-15-3 vs Ti-8Mo-8V-2Fe-3Al
Titanium · grade comparison
Titanium Ti-15-3 and Ti-8Mo-8V-2Fe-3Al are both titanium grades. Ti-8Mo-8V-2Fe-3Al is the stronger of the two: yield strength 1,240 MPa (180 ksi) against 790 MPa (115 ksi) for Ti-15-3, about 57% more; tensile strength follows at 1,300 MPa (189 ksi) vs 820 MPa (119 ksi). In exchange, Ti-15-3 is the more ductile: elongation 20% versus 8% for Ti-8Mo-8V-2Fe-3Al, and Ti-8Mo-8V-2Fe-3Al is harder (370 HB vs 265 HB). Ti-8Mo-8V-2Fe-3Al is stiffer (110 GPa vs 82 GPa) and Ti-8Mo-8V-2Fe-3Al runs hotter in service (315°C vs 260°C continuous). On the shop floor, Ti-15-3 welds better (very good vs fair) and Ti-8Mo-8V-2Fe-3Al sits in a lower cost tier (high, $$$$) than Ti-15-3 (specialty, $$$$$).
Ti-15-3Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
Ti-8Mo-8V-2Fe-3AlChoose it when strength drives the design, or when the part sees heat.
Ti-15-3 vs Ti-8Mo-8V-2Fe-3Al: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all titanium grades 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 titanium grades 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Physical
Density and transition temperatures.
Density
Same in both: Melting Point (Solidus) 1,600°C2,912 °F · Liquidus Temperature 1,650°C3,002 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Specific Heat Capacity 500 J/kg·K0.12 BTU/lb·°F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 1.2 % IACS
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
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 titanium grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | Ti-15-3 | Ti-8Mo-8V-2Fe-3Al |
|---|---|---|
| CNC machining | Yes | — |
| Sheet metal | Yes | — |
| Default condition | O | — |
| Relative cost | $$$$$ Specialty | $$$$ High |
| Min. machined wall | 1 mm | — |
| Best machined surface | Ra 1.6 µm | — |
| AlCrN | Yes | — |
| AlTiN | Yes | — |
| Anodizing Type II | Yes | — |
| CVD Al2O3 | Yes | — |
| CVD TiCN | Yes | — |
| CVD TiN | Yes | — |
| Cerakote | Yes | — |
| CrN | Yes | — |
| DLC | Yes | — |
| Electropolishing | Yes | — |
| HVOF Coating | Yes | — |
| MoS2 | Yes | — |
| Multilayer CVD | Yes | — |
| TiAlN | Yes | — |
| TiB2 | Yes | — |
| TiCN | Yes | — |
| TiN | Yes | — |
| WC/C | Yes | — |
They share 1 finish: Plasma Spray.
Ti-15-3 vs Ti-8Mo-8V-2Fe-3Al — frequently asked
Is Ti-8Mo-8V-2Fe-3Al stronger than Ti-15-3?
Yes. Ti-8Mo-8V-2Fe-3Al has a typical yield strength of 1,240 MPa (180 ksi) against 790 MPa (115 ksi) for Ti-15-3 — about 57% more. Tensile strength is 1,300 MPa (189 ksi) vs 820 MPa (119 ksi).
Which is cheaper, Ti-15-3 or Ti-8Mo-8V-2Fe-3Al?
Ti-8Mo-8V-2Fe-3Al is the lower-cost material: it sits in the high tier ($$$$) while Ti-15-3 is specialty ($$$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, Ti-15-3 or Ti-8Mo-8V-2Fe-3Al?
Ti-15-3. Its machinability rates poor (20/100) against not recommended (14/100) for Ti-8Mo-8V-2Fe-3Al; for welding the order is Ti-15-3 first (very good, 70/100) then Ti-8Mo-8V-2Fe-3Al (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ti-15-3 and Ti-8Mo-8V-2Fe-3Al 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.