Titanium Ti-6Al-2Sn-4Zr-2Mo-0.1Si Mill Annealed vs Ti-6Al-2Sn-4Zr-2Mo-0.1Si-STA
Titanium · Ti-6Al-2Sn-4Zr-2Mo-0.1Si temper comparison
Ti-6Al-2Sn-4Zr-2Mo-0.1Si Mill Annealed and Ti-6Al-2Sn-4Zr-2Mo-0.1Si-STA are two conditions of the same titanium grade, Ti-6Al-2Sn-4Zr-2Mo-0.1Si: Mill Annealed (790–815 °C, 1–2 h, air cool) versus STA (solution treated and aged). The chemistry is identical, so every difference below comes from the condition. Ti-6Al-2Sn-4Zr-2Mo-0.1Si-STA is the stronger of the two: yield strength 1,000 MPa (145 ksi) against 910 MPa (132 ksi) for Ti-6Al-2Sn-4Zr-2Mo-0.1Si Mill Annealed, about 10% more; tensile strength follows at 1,100 MPa (160 ksi) vs 1,000 MPa (145 ksi). In exchange, Ti-6Al-2Sn-4Zr-2Mo-0.1Si Mill Annealed is the more ductile: elongation 14% versus 12% for Ti-6Al-2Sn-4Zr-2Mo-0.1Si-STA, and Ti-6Al-2Sn-4Zr-2Mo-0.1Si-STA is harder (35 HRC vs 31 HRC).
Ti-6Al-2Sn-4Zr-2Mo-0.1Si Mill AnnealedChoose it when the part is bent, formed or impact-loaded.
Ti-6Al-2Sn-4Zr-2Mo-0.1Si-STAChoose it when strength drives the design.
Ti-6Al-2Sn-4Zr-2Mo-0.1Si Mill Annealed vs Ti-6Al-2Sn-4Zr-2Mo-0.1Si-STA: 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-6Al-2Sn-4Zr-2Mo-0.1Si Mill AnnealedTi-6Al-2Sn-4Zr-2Mo-0.1Si-STA
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
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
Same in both: Elastic (Young's) Modulus 114 GPa16.5 Msi · Shear Modulus 44.5 GPa6.5 Msi · Bulk Modulus 107 GPa15.5 Msi · Poisson's Ratio 0.32
Physical
Density and transition temperatures.
Same in both: Density 4.54 g/cm³0.16 lb/in³ · Melting Point (Solidus) 1,650°C3,002 °F · Liquidus Temperature 1,705°C3,101 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 7 W/m·K4 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 7.7 µm/m·K4.3 µin/in·°F · Latent Heat of Fusion 365 J/g157 BTU/lb · Max Service Temperature (continuous) 480°C896 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 0.87 % IACS · Electrical Resistivity 1.98×10⁻⁶ Ω·m78 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V · Corrosion Resistance 85 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 65 / 100 · Castability 30 / 100 · Brazeability / Solderability 35 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 680 MJ/kg292,348 BTU/lb · Embodied Carbon (primary production) 40 kg CO₂/kg · Embodied Water 800 L/kg95.9 gal/lb · Typical Recycled Content 25%
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.
Ti-6Al-2Sn-4Zr-2Mo-0.1Si Mill Annealed vs Ti-6Al-2Sn-4Zr-2Mo-0.1Si-STA — frequently asked
Is Ti-6Al-2Sn-4Zr-2Mo-0.1Si-STA stronger than Ti-6Al-2Sn-4Zr-2Mo-0.1Si Mill Annealed?
Yes. Ti-6Al-2Sn-4Zr-2Mo-0.1Si-STA has a typical yield strength of 1,000 MPa (145 ksi) against 910 MPa (132 ksi) for Ti-6Al-2Sn-4Zr-2Mo-0.1Si Mill Annealed — about 10% more. Tensile strength is 1,100 MPa (160 ksi) vs 1,000 MPa (145 ksi).
Which condition does FabDigit quote by default, Mill Annealed or STA?
Duplex Annealed is the default Ti-6Al-2Sn-4Zr-2Mo-0.1Si condition in the FabDigit quote flow (neither Mill Annealed nor STA). The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
When should I choose Ti-6Al-2Sn-4Zr-2Mo-0.1Si Mill Annealed over Ti-6Al-2Sn-4Zr-2Mo-0.1Si-STA?
Pick Ti-6Al-2Sn-4Zr-2Mo-0.1Si Mill Annealed when the part is bent, formed or impact-loaded. Pick Ti-6Al-2Sn-4Zr-2Mo-0.1Si-STA when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ti-6Al-2Sn-4Zr-2Mo-0.1Si Mill Annealed and Ti-6Al-2Sn-4Zr-2Mo-0.1Si-STA 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.