Titanium Ti-5Al-5Sn-2Zr-2Mo BSTA vs Ti-5Al-5Sn-2Zr-2Mo-STA
Titanium · Ti-5Al-5Sn-2Zr-2Mo temper comparison
Ti-5Al-5Sn-2Zr-2Mo BSTA and Ti-5Al-5Sn-2Zr-2Mo-STA are two conditions of the same titanium grade, Ti-5Al-5Sn-2Zr-2Mo: BSTA (beta STA) versus STA (solution treated and aged). The chemistry is identical, so every difference below comes from the condition. Ti-5Al-5Sn-2Zr-2Mo-STA is the stronger of the two: yield strength 1,050 MPa (152 ksi) against 960 MPa (139 ksi) for Ti-5Al-5Sn-2Zr-2Mo BSTA, about 9% more; tensile strength follows at 1,150 MPa (167 ksi) vs 1,060 MPa (154 ksi). Ti-5Al-5Sn-2Zr-2Mo-STA is the more ductile: elongation 9% versus 7% for Ti-5Al-5Sn-2Zr-2Mo BSTA, and Ti-5Al-5Sn-2Zr-2Mo-STA is harder (37 HRC vs 35 HRC). Ti-5Al-5Sn-2Zr-2Mo BSTA runs hotter in service (500°C vs 450°C continuous).
Ti-5Al-5Sn-2Zr-2Mo BSTAChoose it when the part sees heat.
Ti-5Al-5Sn-2Zr-2Mo-STAChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
Ti-5Al-5Sn-2Zr-2Mo BSTA vs Ti-5Al-5Sn-2Zr-2Mo-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-5Al-5Sn-2Zr-2Mo BSTATi-5Al-5Sn-2Zr-2Mo-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
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: Shear Modulus 44 GPa6.4 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.32
Physical
Density and transition temperatures.
Same in both: Density 4.55 g/cm³0.16 lb/in³ · Melting Point (Solidus) 1,600°C2,912 °F · Liquidus Temperature 1,660°C3,020 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 530 J/kg·K0.13 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 9 µm/m·K5 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 88 / 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 35 / 100 · Brazeability / Solderability 40 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 700 MJ/kg300,946 BTU/lb · Embodied Carbon (primary production) 42 kg CO₂/kg · Embodied Water 1,200 L/kg144 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-5Al-5Sn-2Zr-2Mo BSTA vs Ti-5Al-5Sn-2Zr-2Mo-STA — frequently asked
Is Ti-5Al-5Sn-2Zr-2Mo-STA stronger than Ti-5Al-5Sn-2Zr-2Mo BSTA?
Yes. Ti-5Al-5Sn-2Zr-2Mo-STA has a typical yield strength of 1,050 MPa (152 ksi) against 960 MPa (139 ksi) for Ti-5Al-5Sn-2Zr-2Mo BSTA — about 9% more. Tensile strength is 1,150 MPa (167 ksi) vs 1,060 MPa (154 ksi).
Which condition does FabDigit quote by default, BSTA or STA?
DA is the default Ti-5Al-5Sn-2Zr-2Mo condition in the FabDigit quote flow (neither BSTA 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.
Which welds better, Ti-5Al-5Sn-2Zr-2Mo BSTA or Ti-5Al-5Sn-2Zr-2Mo-STA?
Ti-5Al-5Sn-2Zr-2Mo-STA. Its weldability rates good (55/100) against fair (48/100) for Ti-5Al-5Sn-2Zr-2Mo BSTA.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ti-5Al-5Sn-2Zr-2Mo BSTA and Ti-5Al-5Sn-2Zr-2Mo-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.