Titanium TC21 vs Ti-6Al-6V-2Sn
Titanium · grade comparison
Titanium TC21 and Ti-6Al-6V-2Sn are both titanium grades. TC21 is the stronger of the two: yield strength 1,060 MPa (154 ksi) against 980 MPa (142 ksi) for Ti-6Al-6V-2Sn, about 8% more; tensile strength follows at 1,150 MPa (167 ksi) vs 1,050 MPa (152 ksi). In exchange, Ti-6Al-6V-2Sn is the more ductile: elongation 14% versus 10% for TC21, and TC21 is harder (38 HRC vs 36 HRC). TC21 runs hotter in service (350°C vs 315°C continuous). On the shop floor, TC21 welds better (50 vs 35 out of 100).
TC21Choose it when strength drives the design, or when the part sees heat.
Ti-6Al-6V-2SnChoose it when the part is bent, formed or impact-loaded.
TC21 vs Ti-6Al-6V-2Sn: 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)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
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)
Max Service Temperature (continuous)
Same in both: Latent Heat of Fusion 365 J/g157 BTU/lb · Min Service Temperature -196°C-321 °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
Castability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Water
Typical Recycled Content
Same in both: Embodied Carbon (primary production) 45 kg CO₂/kg
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 | TC21 | Ti-6Al-6V-2Sn |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 1 finish: Plasma Spray.
TC21 vs Ti-6Al-6V-2Sn — frequently asked
Is TC21 stronger than Ti-6Al-6V-2Sn?
Yes. TC21 has a typical yield strength of 1,060 MPa (154 ksi) against 980 MPa (142 ksi) for Ti-6Al-6V-2Sn — about 8% more. Tensile strength is 1,150 MPa (167 ksi) vs 1,050 MPa (152 ksi).
Which is cheaper, TC21 or Ti-6Al-6V-2Sn?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, TC21 or Ti-6Al-6V-2Sn?
TC21. Its weldability rates fair (50/100) against fair (35/100) for Ti-6Al-6V-2Sn.
Ready to make it?
Upload a CAD file and FabDigit prices the part in TC21 and Ti-6Al-6V-2Sn 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.