Titanium Ti-15Mo-2.7Nb-3Al-0.2Si vs Ti-8Mo-8V-2Fe-3Al
Titanium · grade comparison
Titanium Ti-15Mo-2.7Nb-3Al-0.2Si 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 810 MPa (117 ksi) for Ti-15Mo-2.7Nb-3Al-0.2Si, about 53% more; tensile strength follows at 1,300 MPa (189 ksi) vs 840 MPa (122 ksi). In exchange, Ti-15Mo-2.7Nb-3Al-0.2Si is the more ductile: elongation 18% versus 8% for Ti-8Mo-8V-2Fe-3Al, and Ti-8Mo-8V-2Fe-3Al is harder (40 HRC vs 28 HRC). Ti-8Mo-8V-2Fe-3Al is stiffer (110 GPa vs 80 GPa) and Ti-15Mo-2.7Nb-3Al-0.2Si runs hotter in service (480°C vs 315°C continuous). On the shop floor, Ti-15Mo-2.7Nb-3Al-0.2Si welds better (good vs fair).
Ti-15Mo-2.7Nb-3Al-0.2SiChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Ti-8Mo-8V-2Fe-3AlChoose it when strength drives the design.
Ti-15Mo-2.7Nb-3Al-0.2Si 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.
Ti-15Mo-2.7Nb-3Al-0.2SiTi-8Mo-8V-2Fe-3Al
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
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, Rockwell C
Hardness, Vickers
Hardness, Brinell
Same in both: Poisson's Ratio 0.33
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)
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Specific Heat Capacity 500 J/kg·K0.12 BTU/lb·°F · Latent Heat of Fusion 360 J/g155 BTU/lb
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)
Castability
Brazeability / Solderability
Same in both: Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Same in both: Embodied Energy (primary production) 700 MJ/kg300,946 BTU/lb
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-15Mo-2.7Nb-3Al-0.2Si | Ti-8Mo-8V-2Fe-3Al |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 1 finish: Plasma Spray.
Ti-15Mo-2.7Nb-3Al-0.2Si vs Ti-8Mo-8V-2Fe-3Al — frequently asked
Is Ti-8Mo-8V-2Fe-3Al stronger than Ti-15Mo-2.7Nb-3Al-0.2Si?
Yes. Ti-8Mo-8V-2Fe-3Al has a typical yield strength of 1,240 MPa (180 ksi) against 810 MPa (117 ksi) for Ti-15Mo-2.7Nb-3Al-0.2Si — about 53% more. Tensile strength is 1,300 MPa (189 ksi) vs 840 MPa (122 ksi).
Which is cheaper, Ti-15Mo-2.7Nb-3Al-0.2Si or Ti-8Mo-8V-2Fe-3Al?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Ti-15Mo-2.7Nb-3Al-0.2Si or Ti-8Mo-8V-2Fe-3Al?
Ti-15Mo-2.7Nb-3Al-0.2Si. Its machinability rates poor (20/100) against not recommended (14/100) for Ti-8Mo-8V-2Fe-3Al; for welding the order is Ti-15Mo-2.7Nb-3Al-0.2Si first (good, 60/100) then Ti-8Mo-8V-2Fe-3Al (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ti-15Mo-2.7Nb-3Al-0.2Si 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.