Titanium Ti-4Al-4Mo-2Sn-ANN vs Ti-4Al-4Mo-2Sn-STA
Titanium · Ti-4Al-4Mo-2Sn temper comparison
Ti-4Al-4Mo-2Sn-ANN and Ti-4Al-4Mo-2Sn-STA are two conditions of the same titanium grade, Ti-4Al-4Mo-2Sn: ANN (annealed) versus STA (solution treated and aged). The chemistry is identical, so every difference below comes from the condition. Ti-4Al-4Mo-2Sn-STA is the stronger of the two: yield strength 1,030 MPa (149 ksi) against 900 MPa (131 ksi) for Ti-4Al-4Mo-2Sn-ANN, about 14% more; tensile strength follows at 1,150 MPa (167 ksi) vs 1,010 MPa (146 ksi). In exchange, Ti-4Al-4Mo-2Sn-ANN is the more ductile: elongation 16% versus 13% for Ti-4Al-4Mo-2Sn-STA, and Ti-4Al-4Mo-2Sn-STA is harder (332 HB vs 302 HB).
Ti-4Al-4Mo-2Sn-ANNChoose it when the part is bent, formed or impact-loaded.
Ti-4Al-4Mo-2Sn-STAChoose it when strength drives the design.
Ti-4Al-4Mo-2Sn-ANN vs Ti-4Al-4Mo-2Sn-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-4Al-4Mo-2Sn-ANNTi-4Al-4Mo-2Sn-STA
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
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: Shear Modulus 43 GPa6.2 Msi · Bulk Modulus 108 GPa15.7 Msi · Poisson's Ratio 0.32 · Compressive Strength 1,080 MPa157 ksi
Physical
Density and transition temperatures.
Same in both: Density 4.6 g/cm³0.17 lb/in³ · Melting Point (Solidus) 1,620°C2,948 °F · Liquidus Temperature 1,660°C3,020 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 7.1 W/m·K4.1 BTU/hr·ft·°F · Specific Heat Capacity 540 J/kg·K0.13 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 9.4 µm/m·K5.2 µin/in·°F · Latent Heat of Fusion 365 J/g157 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.1 % IACS · Electrical Resistivity 1.6×10⁻⁶ Ω·m63 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 %)
Weldability
Formability (cold)
Same in both: Castability 25 / 100 · Brazeability / Solderability 35 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 700 MJ/kg300,946 BTU/lb · Embodied Carbon (primary production) 45 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-4Al-4Mo-2Sn-ANN vs Ti-4Al-4Mo-2Sn-STA — frequently asked
Is Ti-4Al-4Mo-2Sn-STA stronger than Ti-4Al-4Mo-2Sn-ANN?
Yes. Ti-4Al-4Mo-2Sn-STA has a typical yield strength of 1,030 MPa (149 ksi) against 900 MPa (131 ksi) for Ti-4Al-4Mo-2Sn-ANN — about 14% more. Tensile strength is 1,150 MPa (167 ksi) vs 1,010 MPa (146 ksi).
Which condition does FabDigit quote by default, ANN or STA?
STA is the default Ti-4Al-4Mo-2Sn condition in the FabDigit quote flow. 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.
Which welds better, Ti-4Al-4Mo-2Sn-ANN or Ti-4Al-4Mo-2Sn-STA?
Ti-4Al-4Mo-2Sn-ANN. Its weldability rates fair (35/100) against poor (28/100) for Ti-4Al-4Mo-2Sn-STA.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ti-4Al-4Mo-2Sn-ANN and Ti-4Al-4Mo-2Sn-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.